Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Poulan => Topic started by: Cut4fun on November 28, 2012, 01:12:35 pm

Title: Poulan 4620
Post by: Cut4fun on November 28, 2012, 01:12:35 pm
Had a poulan 4620 dropped off  today.  Also has a bunch of letters before and after numbers, will get them later.
 Haven't really looked at it yet, just a quick glance.  Seems to look a lot like a  295.

The complaint is the chains wont stay tensioned. Said there was some weird tensioner system on it.  All I noticed was a tool less   clutch cover when I glanced at it.

Any known issues or suggestions?

If he does want me to replace with a older style clutch cover if this turns out to be the problem, what all models   work on this? 295 and ?
Title: Re: Poulan 4620
Post by: 660magnum on November 28, 2012, 01:44:59 pm
I was thinking the 4620 was the Poulan and the 295 was the Poulan Pro?

Seems I remember one was chromed and the other was Nikasil?
Title: Re: Poulan 4620
Post by: Cut4fun on November 28, 2012, 02:06:46 pm
4620 is a poulan pro and looks to be a newer 295.
Title: Re: Poulan 4620
Post by: Cut4fun . on November 28, 2012, 04:31:40 pm
PP4620AVX  if my memory is right.  Pics loading to tell for sure.

NOT a fan of this cheap flimsy clutch cover tool less thing that tightens on 1 bar stud.  ::)

Also the reason it dont keep the chain tight. There is 2 metal gears and 1 plastic gear using 3 gears to adjust tension. Guess which one is stripped.   Why a plastic gear there.

Has anyone tried to put a regular poulan tensioner in these?  Thinking about trying that route.


(http://i59.photobucket.com/albums/g289/doemaster789/200T/pp4620avx002.jpg)
(http://i59.photobucket.com/albums/g289/doemaster789/200T/pp4620avx004.jpg)


Interesting they have went with coil on topside now.

(http://i59.photobucket.com/albums/g289/doemaster789/200T/pp4620avx001.jpg)
(http://i59.photobucket.com/albums/g289/doemaster789/200T/pp4620avx003.jpg)
Title: Re: Poulan 4620
Post by: Cut4fun . on November 28, 2012, 04:45:35 pm
After seeing how these are made I might be able to just flip the plastic gear and put bad side gear away and use the good end. Know here in a bit.   ;)

Part number 545090501   http://www.ebay.com/itm/Bar-Adjustment-Wheel-For-POULAN-PRO-PP4620-545090501-/200639414969


Hmmmm I might have the old style one. See there is a update to the 2 piece one now.  :'(

New and Improved bar adjuster wheel is used on the POULAN PRO PP4620  Part Number 525884202 Replaces Part Number 545090501

Title: Re: Poulan 4620
Post by: Cut4fun . on November 28, 2012, 05:00:44 pm
No such luck. The one I am working on is the old style  and molded one piece plastic.
Title: Re: Poulan 4620
Post by: Cut4fun . on November 28, 2012, 05:56:18 pm
Poulan 4620avx IPL   http://www.poulanpro.com/ddoc/PPOI/PPOI2008_AAaa/PPOI2008_AAaa_PP4620AVX_952802146.pdf
Title: Re: Poulan 4620
Post by: Cut4fun on December 03, 2012, 03:02:31 pm
Just a little Grrrrrr moment. Part came in. You see the 2 parts for the new updated 1 in pic. Well all they sent was the silver metal gear.  :-X ::) >:( :D

(http://chainsawrepair.createaforum.com/index.php?action=dlattach;topic=1324.0;attach=1780;image)

Title: Re: Poulan 4620
Post by: Chris J. on December 06, 2012, 10:32:55 pm
Some folks have drilled the AVX cover to convert it to the standard tensioner.  I've never tried it,  I would lean toward replacing the AVX cover with a AVHD cover.   You'd need to dig through some IPLs to find out which others covers (295, 2900, 4218, etc.) would work.

http://www.barrettsmallengine.com/partslist/poulanpropp4620avhdchainsaw.pdf

http://www.barrettsmallengine.com/poulan/prochainsawpartslist.html
Title: Re: Poulan 4620
Post by: Cut4fun on December 07, 2012, 07:17:54 am
Some folks have drilled the AVX cover to convert it to the standard tensioner.  I've never tried it,  I would lean toward replacing the AVX cover with a AVHD cover.   You'd need to dig through some IPLs to find out which others covers (295, 2900, 4218, etc.) would work.

http://www.barrettsmallengine.com/partslist/poulanpropp4620avhdchainsaw.pdf

http://www.barrettsmallengine.com/poulan/prochainsawpartslist.html


I ask. Owner dont want me switching things, even the crap plastic bar stud clamp.  ::)  Said he got it for Christmas 07-08 and wants to keep it original.  Oh well I tried. 

Still waiting on the 2nd part of the new updated 2 piece part when they sent just 1 of the parts  >:(. Heck I even ordered another here in Ohio hoping one would show up soon. 
Title: Re: Poulan 4620
Post by: Chris J. on December 07, 2012, 12:15:22 pm
If the owner insists on keeping it as an AVX.........:o.

Hopefully the updated parts will be more durable the originals.   Thankfully my 4620 is an AVHD.
Title: Re: Poulan 4620
Post by: Cut4fun on December 07, 2012, 04:05:55 pm
One of the complete parts sets I ordered came in. Works good now with the metal updated gear over the plastic gear that was pushing the 2 metal gears before.  8)

I would be changing covers or modding this cover and tensioner myself if mine.
Title: Re: Poulan 4620
Post by: Cut4fun on December 09, 2012, 05:12:08 pm
Both sets of parts came in so now I'll have a extra on hand.

Test cutting with the 4620 I noticed I do not like that very soft top right side spring AV mounted to the cylinder. Way to soft and feels like my hand is going to hit the moving chain in bucking cuts, even though I know it isnt.
Title: Re: Poulan 4620
Post by: oldpart on December 10, 2012, 05:17:19 pm
Poulan Pro went from the 295 to the 4620. Main difference is a different coil and flywheel. The 295 was a 3 magnet flywheel, the 4620 is a 2 magnet. The AVX adjustment is for those who want to cut a broken apple tree limb once a year. They just will not stay tight. These saws will jump a chain in a heartbeat. I actually have (6) 35 gal. barrels of new chains that jumped off and got burred before ever sawing wood. Parts will interchange on the Poulan 2750, 2775, 2900 and P.Pro 295, 315, and 4620. They are basically the same. The 295, 315, 2775, and 4620 have the chrome plate. The older of these saws with the black muffler were some good saws. It was originally built as a Partner.
Title: Re: Poulan 4620
Post by: Cut4fun . on December 10, 2012, 05:23:08 pm
Poulan Pro went from the 295 to the 4620. Main difference is a different coil and flywheel. The 295 was a 3 magnet flywheel, the 4620 is a 2 magnet. The AVX adjustment is for those who want to cut a broken apple tree limb once a year. They just will not stay tight. These saws will jump a chain in a heartbeat. I actually have (6) 35 gal. barrels of new chains that jumped off and got burred before ever sawing wood. Parts will interchange on the Poulan 2750, 2775, 2900 and P.Pro 295, 315, and 4620. They are basically the same. The 295, 315, 2775, and 4620 have the chrome plate. The older of these saws with the black muffler were some good saws. It was originally built as a Partner.

Now that was some great sharing and info.  Especially this  :o, It was originally built as a Partner. Never heard that before.

Welcome aboard and hope you enjoy the site.
Title: Re: Poulan 4620
Post by: 3000 FPS on December 23, 2012, 11:01:26 am
I am not real familiar with Partner.   Which model number was it that was built as a Partner.  Is it the 315.


Poulan Pro went from the 295 to the 4620. Main difference is a different coil and flywheel. The 295 was a 3 magnet flywheel, the 4620 is a 2 magnet. The AVX adjustment is for those who want to cut a broken apple tree limb once a year. They just will not stay tight. These saws will jump a chain in a heartbeat. I actually have (6) 35 gal. barrels of new chains that jumped off and got burred before ever sawing wood. Parts will interchange on the Poulan 2750, 2775, 2900 and P.Pro 295, 315, and 4620. They are basically the same. The 295, 315, 2775, and 4620 have the chrome plate. The older of these saws with the black muffler were some good saws. It was originally built as a Partner.
Title: Re: Poulan 4620
Post by: Cut4fun on December 23, 2012, 11:49:36 am
I am not real familiar with Partner.   Which model number was it that was built as a Partner.  Is it the 315.

Here is a cool page with newer looking partners listed on the right side.  Maybe from the UK. http://outdoor-power-equipment.net/chainsaw-gas/partner/462/
Title: Re: Poulan 4620
Post by: Chris J. on January 09, 2013, 10:49:08 am
Poulan Pro went from the 295 to the 4620. Main difference is a different coil and flywheel. The 295 was a 3 magnet flywheel, the 4620 is a 2 magnet. The AVX adjustment is for those who want to cut a broken apple tree limb once a year. They just will not stay tight. These saws will jump a chain in a heartbeat. I actually have (6) 35 gal. barrels of new chains that jumped off and got burred before ever sawing wood. Parts will interchange on the Poulan 2750, 2775, 2900 and P.Pro 295, 315, and 4620. They are basically the same. The 295, 315, 2775, and 4620 have the chrome plate. The older of these saws with the black muffler were some good saws. It was originally built as a Partner.

My 4620AVHD came from a neighbor,  hasn't had even a full tank of fuel ran through it.  Apparantly if came from the factory with the wrong chain,  then my neighbor & his son bought another incorrect chain.   Yesterday I bought a low-hour Poulan Pro 295 via CL (for $25.00 I was pleasantly surprised at how little use it shows).  Once I get some photos taken of the two,  I'll post them in case anyone is interested is seeing (spotting?) any differences.
Title: Re: Poulan 4620
Post by: Eccentric on January 11, 2013, 01:12:28 am
Hi Chris!
Title: Re: Poulan 4620
Post by: 3000 FPS on January 11, 2013, 01:36:23 am
My 4620AVHD came from a neighbor,  hasn't had even a full tank of fuel ran through it.  Apparantly if came from the factory with the wrong chain,  then my neighbor & his son bought another incorrect chain.   Yesterday I bought a low-hour Poulan Pro 295 via CL (for $25.00 I was pleasantly surprised at how little use it shows).  Once I get some photos taken of the two,  I'll post them in case anyone is interested is seeing (spotting?) any differences.

I am interested in the differences.   I have a couple of the 295's and really like them.   Post what you find between the two Chris.
Title: Re: Poulan 4620
Post by: Chris J. on January 11, 2013, 09:31:08 am
Hi Chris!

Howdy, Aaron! 

I'm really liking this site, now I just need to get some photos and figure out how to post them.   From what I've read, putting them on PB (I have an account), then posting the link here works best.


3000, I'll see if I can get some comparison/side-by-side photos, my phtography skills are lacking, to say the least.   
Title: Re: Poulan 4620
Post by: Eccentric on January 11, 2013, 05:41:42 pm
Hi Chris!

Howdy, Aaron! 

I'm really liking this site, now I just need to get some photos and figure out how to post them.   From what I've read, putting them on PB (I have an account), then posting the link here works best.


3000, I'll see if I can get some comparison/side-by-side photos, my phtography skills are lacking, to say the least.   

That's what I do.
Title: Re: Poulan 4620
Post by: 660magnum on January 11, 2013, 11:48:00 pm
With Photo Bucket, you just left click on the "img" icon and then right click and paste it in your post on Chainsaw Repair. It requires two open tabs in your browser. One for Chainsaw Repair and one for Photo Bucket .
Title: Re: Poulan 4620
Post by: johnhenryrolf on March 22, 2013, 01:45:45 pm
Hello all...I have both a 295 and a 4620avl.  Visually they are the same, parts seem to all interchange thus far.  I got my 295 first, and absolutely LOVED it!  Had a 2150 that the bar bolts pulled out of, so I got a 4620 and switched it over to the the 3/8 lp chain and bar (off of my 2150).  Cuts like a "blanked" ape, but doesn't oil very good.  The 295 runs oil everywhere all over the bar if I let it idle very long.  The 4620 will run about 20 tanks of gas to one oil, I've tried blowing it out and running some thinned oil through it, I guess the next option would be a new oiler?  Gears are both good, just don't know if anyone else has had trouble with this "cheesy" type of oiler.
Title: Re: Poulan 4620
Post by: Cut4fun . on March 22, 2013, 01:51:12 pm
No 1st hand experience. But I have  read that the 295 saws had stingy oiler issues.    Maybe one of the guys here in the know have a fix.

Welcome to the site.  8)

Title: Re: Poulan 4620
Post by: 3000 FPS on March 22, 2013, 01:54:34 pm
I have a couple of 295's and about three 260's.   I believe they use the same oiler.    If they do not work I just replace them.   They are not expensive and very easy to replace.   

I would however pull the old oiler out and give it a good look and look inside the tank also to see if there could be anything in there to slow the flow of oil. 
Title: Re: Poulan 4620
Post by: johnhenryrolf on March 22, 2013, 07:55:46 pm
Thanks, yeah I've taken the oiler out and blown air through the port.  It's kinda weird because I can take the oil canal plate off and blow air into the oiler and it flows like a river...Then put it all together, and nothing (shouldn't say nothing, I'm still getting oil, just not very much).  I've looked inside the tank, looks good, but there is some sort of springy dingy thing where the port is and I can't quite grasp how to get that all out of there to give the tank a good flushing (any ideas?).  Anyhow, thanks again, I bought my first Poulan 11 years ago, and I love them!  I've bought two others since, didn't have trouble (other than the bar bolts on the 2150) until this one!  They have good motors, just a few little engineering flaws that kinda gives them a "cheap" label.
Title: Re: Poulan 4620
Post by: 3000 FPS on March 22, 2013, 08:07:16 pm
I think because it has been awhile since I had one apart, that the springy dingy thing you refer to is the oil filer pickup.   If that is not attached to your pickup line or if you have not cleaned it to see if it is plugged up that could be your problem. 
Do you have a parts list for the saw.
Title: Re: Poulan 4620
Post by: johnhenryrolf on March 22, 2013, 08:18:08 pm
I've got an exploded view pulled up in another tab, just trying to figure out how to get the pickup out of the tank.  I've had the oiler out several times, but all before I had seen the diagram.  I guess that I'll just have to dive in head-first and find out.  Thanks.
Title: Re: Poulan 4620
Post by: Cut4fun on April 28, 2015, 01:48:52 pm
Poulan Pro 4620AVX PP4620AVX just dropped off.   New bar appears on saw with no chain. New chain in a box. 

Has that weird tool less bar adjuster on the clutch cover. 

Hope it is a easy one to go through. I'm whooped at the moment.

Title: Re: Poulan 4620
Post by: Cut4fun . on April 28, 2015, 04:01:01 pm
This 4620 couldnt have been used but a couple times and very light work if that.  Like new. 

The mix looked like white mold particles growing in it. Dumped 1st thing. 

Taking plug out to check cylinder was a chore. never seen one this tight. Has to have come from factory this way.  Try scrench and not even budging, tap scrench with hand nothing, tapped scrench with ball peen hammer nothing. Now I was getting worried of doing harm.  Pulled out the 17" or so 3/8 breaker bar and plug socket.  Took some doing but it finally broke loose.  Will say that plug is not going back in the saw.

Tuned carb to my mix and saw is ready to go. 
Title: Re: Poulan 4620
Post by: Cut4fun on April 29, 2015, 01:08:36 pm
Got story on saw. His dad had bought new used to drop some what he called bigger trees on their property.  Must be why the 20" .325 set up was missing.  Saw has set since and dad has passed  I am guessing. He talked about him in past tense.  Saw was like new looking.

Only thing I found wrong was he brought me wrong bar 3/8LP and chain pitch 3/8LP.   Good thing I had .325 stuff on hand.   Showed him what he needed to get.

When did the PP4620AVX switch from 295. Just trying to get idea when it might have been bought first year.


For folks learning.  COPY PASTE

How to Determine Size of Replacement Saw Chain

There are three basic measurements needed to determine the replacement chain. The first is the pitch, or the distance between drive lugs on the chain and it determines whether the chain will fit the sprocket. Most saws use 0.325", 3/8", or 0.404" pitch, with 1/4" less common. Most consumer saws use a type of 3/8" chain called "low profile". We call it Picco. A few older saws use 1/2" pitch chain. The second is the gauge, or the thickness of the drive lugs. 0.050" (1.3 mm) and 0.058" (1.6 mm) are most common, 0.043" (1.1 mm) and 0.063" (1.5mm) less common. Pitch and gauge together determine the size of chain. Length is determined by counting the number of drive links, also called drive lugs.

http://www.planopower.com/reference_materials/saw_chain_info.shtml

(http://www.planopower.com/store/images/chain.jpg)
Title: Re: Poulan 4620
Post by: 3000 FPS on April 29, 2015, 01:25:56 pm
I do not have conclusive information but based on reviews and parts lists it looks like the 4620 started around 2006 and 2007.
Title: Re: Poulan 4620
Post by: 660magnum on April 29, 2015, 03:53:25 pm
They had both Poulan and PP 46cc w/20" clamshell engines some 6 or 7 years before that? Don't remember the numbers. There was a series with bolt on carbs and a later one with boots.
Title: Re: Poulan 4620
Post by: 3000 FPS on April 29, 2015, 06:16:02 pm
They had both Poulan and PP 46cc w/20" clamshell engines some 6 or 7 years before that? Don't remember the numbers. There was a series with bolt on carbs and a later one with boots.

Right it was called the PP 295
Title: Re: Poulan 4620
Post by: Eccentric on April 29, 2015, 07:17:35 pm
The green 46cc Poulan variants were the 2700, 2775 and 2900.  Maybe other models too.  There were also black, red, and green Craftsman variants.  Some of these saws had plated cylinders and bare pistons (like a PP295/4620) while others had a plated piston and bare bore.   Most variants seem to have had the plated cylinders, with some of the 2775, 2900, and Craftsman variants having the plated pistons.

Then there's the 49cc versions (Poulan 3050, PP310 and PP315).

Then there's the 36cc and 40cc versions (Poulan 2500, PP255, etc) and the Jonsered and Partner versions of those......................and then there's the 36-141 series Husqvarnas that use those same 36cc and 41cc engines in a completely different chassis...
Title: Re: Poulan 4620
Post by: Chris-PA on April 30, 2015, 10:51:07 am
Actually on this series of saw (P600) they have all been plated cylinders.  It's the other series (mostly 42cc) like is used in the Wild Thing and PP260 that were only plated for Poulan Pro versions (maybe Partner in Euope too?). 
Title: Re: Poulan 4620
Post by: aclarke on April 30, 2015, 10:58:17 am
Are the pistons plated on the saws with non plated bores?  Odd system...
Title: Re: Poulan 4620
Post by: 3000 FPS on April 30, 2015, 11:34:16 am
Are the pistons plated on the saws with non plated bores?  Odd system...

Yes they are.   Even some of the saws with bigger cc' like the Poulan 3300 and the 3400 had plated Pistons and plain bores.  I my self do not care for them but there are some people who do like them and run them.   I have a couple of Poulan 3800's that are plated piston and plain bore that I dropped the cylinders on.  They are around 61 cc and they seem to do ok, but I do not believe they run as strong as their counter part that has the plated cylinder and plain piston version.   They are the Poulan 3700 and are 60 cc.
Title: Re: Poulan 4620
Post by: Cut4fun . on April 30, 2015, 12:43:09 pm
Adam my dad has a  plated piston 3300 54cc he bought new late 80's.  Heavy land use only (not daily like tree guys) but IMO over it's head cutting alot.
 The piston and cylinder from what I could see through exhaust and plug hole were great looking still.  Reason for not pulling it down that far while replacing intake boot and av's.
Title: Re: Poulan 4620
Post by: Cut4fun . on April 30, 2015, 12:55:04 pm
Owner got new b+c and cut yesterday for the 4620. He was smiling saying she does run and cut good for his uses. 

Also told him another friend we work with that could use those 2 new carlton 3/8LP chains and 16" new bar.  Seen him handing them to him today.
Title: Re: Poulan 4620
Post by: Chris-PA on April 30, 2015, 12:58:02 pm
There are some advantages of the chromed piston/bare bore approach:

There is less surface area on the piston, so it makes some sense to give it the harder coating.

The chrome plating will reduce thermal conductivity a bit.

The rings run on the bare cylinder which would seem to be a disadvantage, but in practice does not seem to be a problem.

The worst aspect is if foreign objects get into the cylinder (carbon chunks, etc.), as then they get dragged along the unplated cylinder walls by the piston/ring and plow grooves into it.
Title: Re: Poulan 4620
Post by: Eccentric on April 30, 2015, 01:53:22 pm
Actually on this series of saw (P600) they have all been plated cylinders.  It's the other series (mostly 42cc) like is used in the Wild Thing and PP260 that were only plated for Poulan Pro versions (maybe Partner in Euope too?). 

I have seen bare bore cylinders (and plated pistons) for a few of these 46cc saws.  I would not have said they existed if I had not seen them.  I also know the difference between this series and the one that includes the WT.


Title: Re: Poulan 4620
Post by: Eccentric on April 30, 2015, 02:15:02 pm
For example.....


Plated cylinder, bare piston.  What we're used to seeing in this series.


http://www.ereplacementparts.com/poulan-2900-type-gas-chainsaw-parts-c-16962_17147_130237.html



(http://www.ereplacementparts.com/images/part_530071490.gif)

http://www.ereplacementparts.com/assycylcrankcase-p-641198.html



(http://www.ereplacementparts.com/images/part_530069548.gif)

http://www.ereplacementparts.com/piston-kit-p-248120.html



(http://www.ereplacementparts.com/images/part_530037380.gif)

http://www.ereplacementparts.com/piston-ring-p-248131.html



Bare bore, plated piston.  Seen in the 2900 Type 3 and 4, 2775 Type 3 and 4, some Craftsman 46cc saws, and maybe others.  Seems to be most common in Craftsman versions from what I've seen.  Cylinder, piston kit, and ring are all different part #'s.

http://www.ereplacementparts.com/poulan-2900-type-gas-chainsaw-parts-c-16962_17147_17278.html



(http://www.ereplacementparts.com/images/part_530071491.gif)

http://www.ereplacementparts.com/assycylcrankcase-p-248612.html



(http://www.ereplacementparts.com/images/part_530071496.gif)

http://www.ereplacementparts.com/kitpiston-p-248611.html



(http://www.ereplacementparts.com/images/part_530037380.gif)

http://www.ereplacementparts.com/piston-ring-p-248131.html


Unfortunately, these pics don't show the cylinder bores.  I've seen ebay listings for new 530071491 cylinders with clear pics of the unplated bore.
Title: Re: Poulan 4620
Post by: Chris-PA on April 30, 2015, 02:47:21 pm
Interesting - my 2775 is chromed bore.  I wonder if it's just the replacement sets? 
Title: Re: Poulan 4620
Post by: Eccentric on April 30, 2015, 03:25:04 pm
Look at the MN/SN decal.  There should be a Type #.  IIRC, it precedes the SN.  For example, 1-12234556 would be a Type-1. 

The 2775 Type-1 and 2775 Type-2 both have the normal plated bore and bare piston.  Type-3 and Type-4 are the bare bore, plated piston versions.  Don't think they made many 2775 and 2900 Type-3 and Type-4 saws. 

My guess is that Poulan built those versions to use up the excess bare bore/plated piston sets left over from the Craftsman saw production runs.  I've seen far more bare bore Craftsman 46cc saws than their Poulan branded brothers.

Only reason why I knew the bare bore/plated piston versions exist is because I've researched this series pretty thoroughly.  I put the 46cc engines into the Husky 36-141 chassis, and needed to figure out what would be good donors (and what new/NOS parts on ebay to grab) for my PoulVarnas...  8)
Title: Re: Poulan 4620
Post by: Chris-PA on April 30, 2015, 04:22:38 pm
Thanks, that's good to know and I stand corrected - I had not run into any of the unplated bore versions in this series yet.  It's something I'll have to pay attention to if I ever get any Craftsman versions. 

Oh, and my 2775 is a Type1 so that is consistent.
Title: Re: Poulan 4620
Post by: aclarke on April 30, 2015, 05:41:02 pm
Seems like a neat  set up.  Is the bore fairly rough when new for oil retention?  Normal cross hatch?
Title: Re: Poulan 4620
Post by: Eccentric on April 30, 2015, 06:27:44 pm
Thanks, that's good to know and I stand corrected - I had not run into any of the unplated bore versions in this series yet.  It's something I'll have to pay attention to if I ever get any Craftsman versions. 

Oh, and my 2775 is a Type1 so that is consistent.

I'm not surprised that you hadn't ran into any of them, as they seem to be uncommon.

Seems like a neat  set up.  Is the bore fairly rough when new for oil retention?  Normal cross hatch?

There's some sort of hard coating process.  Something to do with high silicon content aluminum.  If it's like the Briggs and Tecumseh engines with the same sort of finish, then it's only a few thousandths thick.  Not really cross-hatched, but more of a 'frosted' look.  Poulan has produced many 2-stroke engines with this same bore finish. 

The 3400 and 3800 CounterVibe saws, most of the Micro series saws, many of the 33-42cc series consumer saws (including the WildThing), and many blowers and weedeaters have this finish.  It's proven to be much more durable than we'd expect.  Just seems "wrong" to have steel rings riding in a bare aluminum bore..............but it has held up very well over the decades.  Technically, the rings are supposed to ride on a film of oil rather than the bore anyways.  Only thing that seems to kill them is severe 'dusting' from dirt ingestion and running WAY too lean due to air leaks and/or incorrect adjustment.  The 4-stroke lawnmowers with this bore finish seem to be less durable than the Poulan 2-strokes, at least from what I've seen.
Title: Re: Poulan 4620
Post by: aclarke on April 30, 2015, 06:40:37 pm
Thanks Aaron,  maybe be some sort of chemical conversion process that creates a hard oxide layer? I'll Research this more and pass on any info...
Title: Re: Poulan 4620
Post by: aclarke on April 30, 2015, 08:55:46 pm
From what ive read, the Briggs process uses a special high silicon content aluminum and the bore is either  chemically etched to remove the aluminum, leaving the hard silicon as a wear surface.  I've another article saying their is a way to mechanically machine the bore the cylinder while maintaining the hard silicon particles, not sure I buy that...


Is the Poulan process similar to the Briggs?

Wasn't there a 70-80's Vega car using a similar process?
Title: Re: Poulan 4620
Post by: Eccentric on April 30, 2015, 10:06:35 pm
I do remember the POS Vega engine.  We had a dead Vega with that engine in my HS Auto Shop yard.  I believe the process is similar.  Don't know how close the Poulan and Briggs processes are.  Just from my own experience, the Briggs cylinders weren't anywhere near as durable as the Poulans.
Title: Re: Poulan 4620
Post by: aclarke on April 30, 2015, 10:26:05 pm
Cosworth motor version was pretty slick!  I think the block had the same aluminum bores though!   Trying to find info on the Poulan process. Would they be Electrolux mfg or other for that class of motor? (Plain bore)
Title: Re: Poulan 4620
Post by: Eccentric on April 30, 2015, 11:05:00 pm
1970's through 1990's for the 3400-4000 and Micro series saws (and the bare bore versions of the 2800-3600 series that I just now remembered)..............and onward through the 2000's with the 33-42cc WT series.


IIRC, Emerson Electric bought Poulan/Weedeater in 1972 or so from Beaird.  Electrolux bought Poulan/Weedeater in 1979, and then sold the Husqvarna Group (which included Poulan and others) in 2006 or so.
Title: Re: Poulan 4620
Post by: Eccentric on April 30, 2015, 11:06:02 pm
Cosworth motor version was pretty slick!  I think the block had the same aluminum bores though!   Trying to find info on the Poulan process. Would they be Electrolux mfg or other for that class of motor? (Plain bore)

The Cosworth version of just about anything has been pretty slick. 8)
Title: Re: Poulan 4620
Post by: Cut4fun . on March 06, 2017, 07:12:46 pm
Saving clutch cover # for a saw coming in. Getting rid of that tool less BS cover. ;)  530054819
Title: Re: Poulan 4620
Post by: Fishnuts2 on March 11, 2017, 09:30:49 am
I was able to get a free 4620 AVX going again by using the updated metal gear and the newer style tool less "nut".  It holds bar tension like any other and I've cut a couple of tanks worth and not had to adjust the chain.

I also put a 16" bar on it like it should have had in the beginning, and kept the .325 chain.  Made a nice little saw.
Title: Re: Poulan 4620
Post by: Cut4fun . on March 11, 2017, 02:21:37 pm
This one has a like new cover still on it with new parts I installed in 2012.  I think it is just operator error, but he says he cant keep the chain tight with this tensioner set up.

I have new oem old school clutch cover and chain brake in hand. Along with 2 new LPX 325 chains I have grown fond of since the 325 chain build off. Like them stock and modded.

Also hope I have the right new bar nuts I ordered in bulk for my poulans. Knowing my luck they will be different.
Title: Re: Poulan 4620
Post by: Cut4fun . on March 11, 2017, 07:16:50 pm
Nope didnt use the bar nuts I bought for my older poulans I run. But it did take the husqvarna bar nuts I keep in stock too. :)

That regular metal clutch cover with front tensioner is much nicer to use.  Owner will like.
Title: poulan 4620 avx
Post by: stubnail67 on September 03, 2018, 10:34:06 am
Anyone know the last year this saw was made or sold? i have not seen them in awhile they had them at my local sears out let  a few years back not sure how many wish i woulda bought them when the went on sale.... for the new models..... I have a fellow says he bought one new at tractor supply last year but the last ones i saw were around 2011-2012???I asked him to send me a pic of the sticker with the date below the choke knob ... but he said he was not home .....I tried to look it up but could not find the last time they were made or sold....would like to know for my own education .... and i will post back if i find out myself...
Title: Re: poulan 4620 avx
Post by: stubnail67 on September 03, 2018, 10:45:12 am
So far 2012 is what im seeing....what i thought... i do think you could still buy them online for a year or 2 after that....but not last year brand new from a store right after irma 2017... if he said ebay nos i would believe him.....Guess im getting tired of People and the BS ...
Title: Re: Poulan 4620
Post by: Cut4fun . on September 06, 2018, 11:04:03 am
I just got back into town myself. I would think Roger or Aaron would know.

I never looked at the stickers on the ones that came through. But one like new one the guy said he got it for Christmas around 08. 
Title: Re: Poulan 4620
Post by: Cut4fun . on September 06, 2018, 11:08:44 am
I was looking at this IPL and see 2012 too.  https://www.partstree.com/parts/poulan/parts/530071490/


    Poulan PP295 (Type 3) - Poulan Pro Chainsaw - Engine Assembly Type 3
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    Poulan PP4620AVHD - Poulan Pro Chainsaw - Engine Assembly
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    Poulan PP4620AVX (952802169) - Poulan Pro Chainsaw (2012-01) - ENGINE
    Poulan PP4620AVX - Poulan Pro Chainsaw - Engine Assembly
Title: Re: Poulan 4620
Post by: 3000 FPS on September 07, 2018, 10:09:28 pm
I have never checked any dates so sorry did not know. 
Title: Re: Poulan 4620
Post by: Cut4fun . on September 09, 2018, 11:33:48 am
I have never checked any dates so sorry did not know. 

Any of yours have date on sticker on back?