Author Topic: Poulan 4620  (Read 1424 times)

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Offline aclarke

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Re: Poulan 4620
« Reply #50 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?

Offline Eccentric

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Re: Poulan 4620
« Reply #51 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.
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline aclarke

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Re: Poulan 4620
« Reply #52 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)

Offline Eccentric

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Re: Poulan 4620
« Reply #53 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.
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Eccentric

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Re: Poulan 4620
« Reply #54 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)
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Cut4fun .

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Re: Poulan 4620
« Reply #55 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
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Online Fishnuts2

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Re: Poulan 4620
« Reply #56 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.
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Offline Cut4fun .

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Re: Poulan 4620
« Reply #57 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.
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Offline Cut4fun .

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Re: Poulan 4620
« Reply #58 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.
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Offline stubnail67

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poulan 4620 avx
« Reply #59 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...

 

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