Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Dolmar Makita => Topic started by: 660magnum on April 15, 2013, 02:36:29 pm

Title: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on April 15, 2013, 02:36:29 pm
Converting a Dolmar 111i from a open port cylinder and non window single ring piston to a closed port Dolmar 115i closed port cylinder and a Meteor double ring window piston. 

I was in the process of converting my Dolmar 111i to a 115i with the addition of a closed port cylinder from one of my model airplane engines. I have already changed the clutch over to the wrap coil spring clutch of the 115 and changed the rim over to 3/8" X 7 pin and have a 59 DL 16" bar on it. I also put a new 3.4mm  double braid pull cord in the starter. I would like to make note here that the very last 111i's made had closed port 44mm cylinders and window pistons from the factory just like the 115i.

The cylinder is a used one that is in nice shape. It also has a Mahle single ring piston.

I originally intended to clean up a straight gassed cylinder I had but decided to use the cylinder from the model airplane engine. I bought a Meteor 44mm 2 ring window piston form the Israeli for $35 incl shipping. It has the same squish height as the OEM Mahle window piston but the Meteor is domed. It also has a short skirt. The Meteor is a nice piston except for the skirt that is about 1 1/2 mm short. As a result, it free ports about .010" about half way across the bottom of the exhaust port. Essentially just enough to say it free ports!

Some people like Neil Murphy proclaim that this small amount free porting will not hurt anything? What do you think about the free porting?

I cannot understand why Meteor pistons have the short skirts?

I also noticed that both rings of the Meteor piston come down into the intake port port but the pins do not show. On the OEM piston, the single ring also completely shows in the intake port. I would like to use the Meteor piston because it is new and has the dome and more intake timing but I don't like the two rings instead of one and I don't like the short skirt.

I can just use the OEM Mahle piston which does not free port? I like the idea that it is single ring but it is flat top.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 15, 2013, 02:55:18 pm
ditch the bottom ring, throw it together and run it. .010 freeport aint gonna do anything but screw with yer head. i've had saws here with a good chunk of the skirt missing from the exhaust side (really big free port) and you wouldn't notice it while running. of course, when found, it was fixed, and you had a few beers wondering how far from fully coming apart that piston was.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 15, 2013, 04:23:23 pm
Thanks
Title: Re: FREE PORTING PISTON
Post by: adam32 on April 15, 2013, 05:50:09 pm
How about a bit of freeport on the side of the exhaust port...?
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 15, 2013, 09:41:36 pm
it's never a good idea to do that. bad infact. totaly different can of worms.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 15, 2013, 10:04:31 pm
Well, earlier in the week I had a broken tooth exactly as you did. This afternoon was my day to go to the dentist. I got there 35 min early and had to wait an hour to get in the chair where I sat for two hours. I now have a temporary tooth for a couple weeks. The dentist cut me a deal of 10% off so it was only $1147.50 for the one tooth.

Now I've got this strange thing in my mouth that I keep feeling of with my tongue.

Anyway, the Dolmar 111 with the closed port cylinder started right up and ran like it had never been apart - free porting exhaust and all.

My new 115 clutch assembly didn't work so well. It wasn't together correctly - the big sheet metal disk behind the shoes was out of position on one shoe and jammed up and wouldn't release. Snapped it together correctly and I spent some time on the clutch tonight inspecting everything and the new bell wasn't relieved correctly in the hub to drive the worm and made everything tight. The oiler did work though. Examining the old bell, there was nothing wrong with it so I just used the old bell and now everything seems fine.

Now I've got to secure what's left of the model airplane engine and the old parts.

Examining the OEM piston and closed port cylinder, all the interrelational timing factors are not thought out as well and as close on the 115 as they were on the 116S/120S/6000/6800 swap I did a couple weeks ago.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 15, 2013, 11:00:25 pm
 ;D yeah i have one of them 'temp toofs'. waiting on the infection to totaly clear up and the root to heal, or something like that. i wasn't listening as i  was enjoying the non pain at that moment :) mine has a small area where there is a little pressure point that wasn't there before, but i can live with that. pure heaven compared to before.

do the top ends from the 115 bolt on directly? never been into a 115. lots of 111's, have one myself. and it's a good saw. but you know. always looking for a little more ooomph.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 15, 2013, 11:13:35 pm
The 111 and the 115 are the same saw frame.

The 111 clutch had the two "U" shaped springs and the 115 had the coil spring loop. They were both two shoe designs. The last ones in that series had a 3 shoe design with the loop spring.

As a general rule the 111 was open port and the 115 was closed port.

111 came with a 15" bar 8 pin on 325 and 7 pin on 3/8"

The 115 had a 18" bar.

The closed and open port cylinders are interchangeable but the closed port piston has windows. There's no difference in the carbs, ignition or mufflers.

The Meteor piston is a window piston and will work on either cylinder.

Cylinders and pistons are no longer available at the USA distributors.

The "i" versions had Tillotson carbs.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 15, 2013, 11:19:32 pm
 >:( great. now i'm going to have to find a good 115 topend. juuuuuust great.
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 12:44:09 am
I did not know that about the 115 being closed port and the 111 being an open port design.   I have two 111i's but have never taken the cylinders off.     Something to look out for.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 06:30:56 am
i've ran a couple few of the 115's, but never had to go into one. and they do feel like they have a bit more zip. never paid any attention as to why. just thought they were a good dolly that ran well for it's size.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 07:56:09 am
People reading this and trying to get The Dolmars sorted out . . . .

This family of chainsaws is the Dolmar and some times Makita 109, 110, 111, & 115. They all had a common crank shaft and crankcase.
The 109 & 110 had a 40mm bore 43cc and the 111 & 115 had a 44mm bore 52cc. They all had the same crankshaft. The 110 and 115 were supposedly closed port and the 109 and 111 were open port. It appears that the 111i was the most popular of all these? Later renditions became the 520 and also there was a 45mm bore 54cc 540 orphan that existed at the end. My open port 111i had a Kolbenschmidt cylinder and I have four closed port cylinders and they are all Mahle. Also there were later versions made as the PS43 & PS52 that had aluminum rather than magnesium crankcases as non pro price point chainsaws.

These chainsaws were made from the mid 80's until somewhere around 2004 or for close to 20 years. Most are now 15 yrs old or older. So, keep in mind that some one with a pile of old chainsaws may have mixed and matched some parts here and there and you may very well have a Frankensaw odd ball?

Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 08:21:31 am
bought my 111i new on 1991. the yguy was clearing out the sachs-dolmar stuff to make room for jonny and echo. if i remember corectly, i paid just under 400bux plus tax. :) was 15 going on 16, and was cutting wood for money. friends neighbor had a 123 and let me run it for a while and i was impressed. so went to the dealer to have a looksee. no idea why i ended up with the 111, but i ain't complaining what so ever. that girl and i cut alot of firewood over the years. even had a couple other friends go and buy them before that guy sold out. good saws.
now i'll have to go snap some pics. she is rather photegenic :)
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 09:38:28 am
Here is my Dolmar 111i from 1997. It was a freebe given to me by the local chainsaw dealer as it had a blown high speed nozzle check valve and had gone through a flood but the water was just up on it a couple inches. Due to all the oil on the lower part of the saw, there was no actual water damage. One of those situations where it started right up at home but didn't actually run correctly.

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar111i.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar111i.jpg.html)

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar111i1997.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar111i1997.jpg.html)
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 09:57:44 am
The closed port cylinder I used on this chainsaw came from a Brison 6.4 opposed twin model airplane engine. It is 104cc. The engine had been run on Amsoil oil at 100 to one. The right cylinder looked as though it had been straight gassed. I got it cheep and the guy told me he had put a new cylinder and piston on the right side. After pulling that cylinder, it appears that the new cylinder was only new to him as it had been used quiet a bit. It may have originally come from a single 3.2cc Brison?

There were several companies that made Sachs Dolmar based model airplane engines of all sizes back in the late 80's up through about 2005. They used the Dolmar cylinder and piston assemblies. These model airplane engines were all different combinations of cut down Dolmar cranks and cases to custom bottom ends.

I also have a never run Brison 3.2 single cylinder model airplane engine from 2005. The 3.2 single from Brison was probably the most popular of these.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 11:49:21 am
here's mine. older version.
and that meens it's faster! :D
(http://i50.tinypic.com/28braea.jpg)
(http://i48.tinypic.com/2ch71vk.jpg)
(http://i45.tinypic.com/123p552.jpg)
(http://i49.tinypic.com/59u2k0.jpg)
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 12:34:59 pm
660Magnum nice pictures.    It seems to me that those engines from R/C  planes is another whole world of engine modifying that some of the chain saw guys never even thought of.


Brokenbudget nice 111i.    I really like the ones I have which are older like yours.    Right now they are all sitting up in Wyoming.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 02:52:31 pm
Budget, very nice 111. They stay nicer as a one owner saw.

Mine had two years of shop grime on it from setting under a work bench in addition to never having been wiped off by the original owner.

It cleaned up OK but then I dropped and cut up 6 pines and got it all dirty again.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 03:09:46 pm
thanks! it's the only saw i "baby" :) must be the 'first new saw for me' symdrome. it's never really been banged around. it wa always the one that rode in the back of the cab in the truck, or had it's special little space in the box or trailer cleared and kept stuff away from hitting it.
i would like to get a new sticker for the clutch cover.
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 03:16:20 pm
You find one of those stickers please let me know, I would like a couple myself.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 03:18:44 pm
maybe ;D
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 03:41:49 pm
Those little stickers are NLA
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 03:42:54 pm
oh yeah i know. but i have seen them on ebay here and there. just waiting for the next go round :)
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 05:08:02 pm
maybe ;D

Who put that funny looking pipe on your exhaust?    Maybe,  I will put one on mine like that.   
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 05:12:26 pm
I was out cutting with mine a little bit ago and thinking about that outlet on your muffler for the originals just blow straight down across the bolt head.

(http://i48.tinypic.com/2ch71vk.jpg)
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 05:36:22 pm
Plus I think the original is a bit restrictive.    I put pipes on alot of my saws.   It is usually one of the first mods I will do when I get a saw.   Heck I have even used an old shower curtain rod before.   
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 05:43:09 pm
Took me awhile to find the pics.   
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 05:53:36 pm
There's two different oil pump drives on these. The change point was Dec 96.

I only have the later one. On this one, there is a recess counter bore in the end of the clutch drum under the rim gear drive. This part of the clutch drum extends over a small spacer the diameter of the needle bearing so the drum can extend back to drive the nylon worm gear for the oil pump. You can see a corresponding recess in the plastic worm gear almost like an imprint of the end of the clutch drum showing the teeth of the hub.

There is another older clutch drum with no recess and there is a spacer and big finder washer between the oil pump worm gear and the clutch bell

This pdf image is from 2004. The top illustration is of the new 3 shoe clutch but in it you can see the new style worm gear drive that was used on all three clutches from December 96 on . . .

The bottom of the image shows the old style clutch drive.

The older system is a full time oil pump drive and the newer system only pumps oil when the clutch is engaged and the chain is turning. I've had several chainsaws with full time oil pumps and they are just fine and not noticeable unless you just let the chainsaw set there and idle a long time.

This has nothing to do with which style spider you are running.
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 06:25:59 pm
That is alot of different models all using the same pump.   
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 06:29:26 pm
I've got to work on the chain on my Dolmar a little. It is the old style Oregon semi chisel chain with the straight front rakers.

It's a old one that came in a box of chainsaw junk that someone had rocked. I filed it back enough that it should have cut good and took the rakers down some but it doesn't cut like I'm used to at all. It is just a semi chisel not a full chisel but there are a need for these sometimes.

I measured the raker height tonight and they are only down about .010" so I need to go over the teeth once again and then take the rakers down where they should be.
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 06:36:04 pm
That chain on my 111i is a .325 that came with the saw.   It is a 18' bar and the chain is a chisel.   It is one of the chains that I converted to square grind with the gray wheel.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 06:37:01 pm
That is alot of different models all using the same pump.

I think the pumps are pretty much the same through those twenty years but the drive is different. I notice in this pdf they are saying 1994 was the change point for the drive set up but in another ipl they are saying Dec 1996.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 06:39:38 pm
the mufflers are rather restrictive. didn't want to take the muffler off tonight, but hee's some pics of the 'deflector'. when you remove the deflector, it's pretty straight forward what needs to be done. :) the paint is smudged on the muffler and makes it look like it's squashed. it's straight as an arrow :)
(http://i49.tinypic.com/ne8end.jpg)
(http://i46.tinypic.com/vdjsir.jpg)
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 06:43:17 pm
Mine was originally .325 8 pin and in the picture is the original 15" X .058" bar which I quickly replaced with a 18" bar with Carlton chisel chain.

But now I have 3/8" X 7 pin rim on it. The bar was a .325 but I put a 3/8" nose on it. The bar is 16" X .050 and the chain is 59DL.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 16, 2013, 06:44:46 pm
My muffler has shiny places on the black also
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 16, 2013, 06:49:05 pm
Hey brokenbudget did you leave a spark arrestor in the muff?
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 16, 2013, 06:56:27 pm
no. but i do have a stihl screen to put on the tube if needed. haven't used it as of yet, not really worried about starting fires on the swamp in the winter or out in the yard blocking wood. :)
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 17, 2013, 07:26:28 pm
I sharpened the old style Oregon semi chisel chain without the extra bumper on every other DL last night and took the rakers down where they ought to be. All the top plates are not completely cleaned up as someone filed a half dozen left hand ones at 40 degrees.

Sawed with it some this afternoon and it cuts like it should.

I have the mixture set at 12700 free running at where it four cycles. It cleans up nicely in the cut. Sure seems to carry a lot of rpm in the cut like my Dolmar 6800.

In spite of all the goody talk about old Dolmar rpm, keep in mind that these figures are down a thousand from a 346.

Needless to say, to have a 6800iH and 115i pair out in the woods would be a fine combination. Your dog would not be ashamed to be out there with you.

The Ole 6800 (new style Dolmar 120Si) started right up, first pull, with the choke on after setting a couple weeks.
Title: Re: FREE PORTING PISTON
Post by: brokenbudget on April 17, 2013, 08:41:28 pm
i can let that 111i sit for a month or 2 and she will light off on the 3rd pull and be happily running on the 4th. if it's started regularly (if i'm using it) it'll go on the second. it pulls the chain almost as good as the 5105.
Title: Re: FREE PORTING PISTON
Post by: 660magnum on April 18, 2013, 12:00:45 am
When playing with the clutch on the 111i family of chainsaws, the ones with rim sprockets have two different drive set up for the worm gear. Not exactly sure when the change over date was but one ipl proclaims 12-96?

The old worm is metal and the new one plastic. The plastic one has a shadow of the end the clutch hub on the outer end.

The hub of the new style clutch drum has a counter bore that extends over the shoulder on the end of the crankshaft to engage the oil pump worm.

The old style metal worm is a interference fit on the crank and this oil pump system is full time, even when idling and the chain not running. I've had saws like this and you would not notice in normal use.

The new style oil pump drive has the plastic worm with a sintered bronze Oilite bushing inside that floats on the crankshaft and is driven by the hub of the clutch drum. This oil pump only works when the chain is spinning. Possibly a EPA thingy?
Title: Re: FREE PORTING PISTON
Post by: 3000 FPS on April 18, 2013, 12:06:39 am
I see that difference on the clutch drum and is something to look out for.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on April 18, 2013, 01:32:09 am
DOLMAR 111 OPEN PORT CYLINDER AND PISTON

Notice the straight transfer outsides on the outside of the cylinder instead of the bulging transfer outsides like on a closed port cylinder. Notice the piston has no windows. AFAIK the window piston will work in a open port cylinder. Which cylinder is on a 111i chainsaw is difficult to see unless you remove the top cover. This is a Kolbenschmidt brand OEM cylinder which is typical of the open port cylinder.

(http://img.photobucket.com/albums/v11/jamesirl/DolmarOpenPortCylinderr.jpg) (http://smg.photobucket.com/user/jamesirl/media/DolmarOpenPortCylinderr.jpg.html)

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar111OpenPortCylinderInside.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar111OpenPortCylinderInside.jpg.html)

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar111OpenPortCylinderClose.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar111OpenPortCylinderClose.jpg.html)

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar111OpenPort44mmPistonOEM.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar111OpenPort44mmPistonOEM.jpg.html)
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on April 18, 2013, 01:44:19 am
CLOSED PORT DOLMAR 115 CYLINDER

Closed port cylinders generally have more torque. They are unusual to be seen on a chainsaw less than 45cc in size.

Notice the bulging outsides of the transfers and the windows in the piston. This is a Mahle cylinder and the OEM piston is also Mahle. The carb and muffler fittings all fasten right into place on a Dolmar 111i. Also the cylinder bolt patterns and all the gaskets are the same.

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar115closedPortCylinderInside.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar115closedPortCylinderInside.jpg.html)

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar115ClosedPortCylinderR-1.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar115ClosedPortCylinderR-1.jpg.html)

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar115ClosedPortWindowPistonMeteor.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar115ClosedPortWindowPistonMeteor.jpg.html)

(http://img.photobucket.com/albums/v11/jamesirl/Dolmar115ClosedPortCylinderL.jpg) (http://smg.photobucket.com/user/jamesirl/media/Dolmar115ClosedPortCylinderL.jpg.html)

Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 3000 FPS on April 18, 2013, 01:56:41 am
Looking at the base of those two cylinders they look like a match.   Like you pointed out the bulge in the cylinder is the give away.  Very good info, thanks.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on April 22, 2013, 04:40:38 pm
Is a beautiful day. I did a bunch of pruning with the Dolmar 111i with the 115 closed port P&C, clutch, and 3/8" X 16" bar. Pulled the limbs to the brush pile. The chainsaw ran perfect.  The old Oregon 3/8" semi chisel chain cut OK but it cramps my style to use that rocked chain when I can see the outside damage on some of the cutters.

I need to get a new loop of Oregon CL?
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 3000 FPS on April 22, 2013, 07:02:35 pm
The saw sounds nice.   As far as the chain goes you know where I am at.   If it needs sharpening it gets square ground anymore unless its semi chisel.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on April 22, 2013, 07:45:41 pm
Haven't decided what I'm going to do. I have several Oregon CL's that are 60DL. I guess I need to find a 60DL bar? Most of my 3 cube saws are 3/8" X 60DL. I also have three big cookie cutters that are 60DL.

The present bar is a 58 or 59 DL. It's a new bar but was a 16" X .325 power match and I put a 3/8" tip on it. I bought the bar as a 160RNDKO95 but it was .325" so I changed the nose. I could also get a 58DL square chain from one of the members here?

I have a square grinder and a ATOP but I use the Oregon Professional guide racks to round file chains.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 3000 FPS on April 22, 2013, 08:53:02 pm
It is funny you mention that about the bar and tip since I did the same thing myself and ended up with I think 59 drive links.   I took a oregon chain I had and broke it down for the 59 drive links and put a new link in it.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on April 22, 2013, 10:01:13 pm
I tried a 60 DL chain on that Frankenbar but ran out of adjustment. The only thing that bothers me is that the throat of the bar was tapered down for a 7 pin .325 rim so it is a little small for a 7 pin 3/8" rim. The 111i has had a 8 pin X .325 rim on it all its life until a couple weeks ago. I had been running a John Deere bar on it for a couple years and it was small too. The .325 chain never jumped off the bar for me. So far the 3/8" chain has not jumped.

I happened to see, some time later, a short chain hanging on my 3/8 X 60 nail. It was 59 DL's and fit up pretty good but it had been rock'd. I have no clue where it came from? I think it was on a Homelite 150XL a guy gave me? The chain has straight raker posts, it is not made like the current Oregon 3/8" semi chisel chain.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 3000 FPS on April 23, 2013, 12:15:49 am
The one I did went on my Poulan 335 predator.  I have not used it alot but no problems so far.

Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on April 23, 2013, 01:56:21 pm
That looks like my Frankenbar which was originally for a G450 Redmax ??? for it said "Redmax" all over it and didn't have any Oregon #'s.

I bought it from Ebay as being a160RNDKO95 bar but it was a 160RNBK095 . I talked to the seller over the phone about it being a bad number but rated the transaction OK for bad Karma can go both ways even if you are correct about a bad transaction. I never bought anything else from that NJ guy. He took the rest of the bars off Ebay.

I scratched the "Redmax" logo stencil away with a 3M pad. Now it is a black bar with a gray tip.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on May 01, 2013, 11:18:34 am
I changed the bar on the Dolmar 111i/115i to a Power Match 160RNDKO95 bar. I didn't think I had another RSC chain and was going to use a LGX that was ground square.

When I went to the chain nail on the wall, I found a nice loop of RSC. So with the new Stihl RSC 60DL loop on the Dolmar, it cut as I liked.

That was last week.

Today I went to use my Husqvarna 545 and after using it, I discovered that it had the LGX chain that was ground square. Apparently I had swapped chains a month ago? My memory is not like it used to be?
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 3000 FPS on May 01, 2013, 11:25:22 am
Too many saws and too many chains.   I have to write everything down myself.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on May 06, 2013, 08:07:54 am
My grandson used the Dolmar 111i/115i saw to limb a 50' black ash that we dropped Saturday. The chainsaw worked flawless.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 3000 FPS on May 06, 2013, 01:00:09 pm
You cannot ask for more then that.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on May 07, 2013, 06:09:35 pm
I must say that it was a pleasure to be cutting green wood for a change after cutting dry wood for so long. The last green wood I had cut was a year and a half ago and it was three 18" DBH yellow pines and two 12" arborvitaes which I went on to noodle all the larger pieces of the pine with the 111i. I had to then clean the sap from the saw.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: David Young on July 05, 2013, 12:15:27 pm
I have a 540,
would I get a performance boost by putting a smaller cp jug on there? 
that cp jug looks like some of Jonsereds last jugs they made like the 2055 and 2077.
any one port the 115 jug?

maybe i should just sell it off and find a different project.

Thanks for your help

David
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on July 05, 2013, 12:58:15 pm
There's not much port widening that can be done to the 115 jug.

Due to the exhaust bolt spacing and the piston skirt width, it just doesn't leave any room.

With a stock piston you can drop the jug a little to get the squish approaching .5mm or .020"

They run pretty good stock. You will like them and will pull a 8 pin rim on .325 or they will run 3/8" chain with pride. 18" is the practical maximum bar length.

I have not looked at a 54cc jug so I know nothing about their timing or even port type. But I understand the 540 to be a mild runner?

Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: David Young on July 05, 2013, 01:10:38 pm
Thank you,
the 540 is a mild runner.  open port jug, I don't know the port timing,  every saw is mild and disappointing once you run a ported saw. 

I will say i have been very impressed with the new 421 dolmar 8)

you have to run one!
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on July 05, 2013, 01:15:29 pm
The 421 is a nice chainsaw as it is the larges member of that family.
Title: Re: FREE PORTING PISTON Dolmar 111 & 115 family
Post by: 660magnum on July 05, 2013, 01:18:47 pm
My experience with the 111/115 family and a closed port cylinder is that the cylinders are no longer available from Dolmar.

You will need to find a NOS (new old stock) one or a good used one.

On a used piston, unless you can see most of the machining marks, I would get a new Meteor piston for it.