Author Topic: FREE PORTING PISTON Dolmar 111 & 115 family  (Read 2266 times)

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Offline 3000 FPS

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Re: FREE PORTING PISTON
« Reply #40 on: April 18, 2013, 12:06:39 am »
I see that difference on the clutch drum and is something to look out for.
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Offline 660magnum

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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #41 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.







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Offline 660magnum

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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #42 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.









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Offline 3000 FPS

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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #43 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.
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Offline 660magnum

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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #44 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?
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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #45 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.
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Offline 660magnum

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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #46 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.
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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #47 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.
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Offline 660magnum

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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #48 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.
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Re: FREE PORTING PISTON Dolmar 111 & 115 family
« Reply #49 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.

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