Author Topic: Dolmar 112  (Read 1325 times)

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Offline 3000 FPS

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Re: Dolmar 112
« Reply #20 on: April 13, 2015, 07:35:49 pm »
Well I got the PTO side seal in.   Turns out that the PS 6800i uses the same seal on the PTO side. 
Part # 962 900 053.   So that number is the same for a Dolmar 112 or the PS 6800i.

I also found when removing the worm gear for the oiler that I did not have puller that would fit it.   But I did find that a 3/4 inch pipe thread Union would screw on to the worm gear close enouph that I could get a 2 jaw puller on it and remove the worm gear.  That is a large diameter worm gear used on the 112.
PP 505, 475, 445.

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Re: Dolmar 112
« Reply #21 on: April 14, 2015, 07:58:14 pm »
Well I got the flywheel side crank seal today and got it installed.   I had to remove the points of course to get the old seal out and put the new one in.   Figured out a way to set the points and saw fired right up.   The best part is no more erratic idle and saw runs great.  Titled the saw in all directions and idle remains constant.   
PP 505, 475, 445.

Offline 660magnum

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Re: Dolmar 112
« Reply #22 on: April 14, 2015, 08:00:13 pm »
Good to hear of the success.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 3000 FPS

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Re: Dolmar 112
« Reply #23 on: April 14, 2015, 08:15:12 pm »
I have a question.   Does the gap size of the points also affect timing.   Let say I set them at .015 and then change them to .017.    Does the timing also change by 2 degrees and if so does a wider gap advance the timing or retard the timing.
I have not worked with points on saws very much so I was curious.
PP 505, 475, 445.

Offline Eccentric

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Re: Dolmar 112
« Reply #24 on: April 14, 2015, 10:54:59 pm »
Wider gap will indeed advance the timing.  Don't think there's a direct/constant correlation between the gap increase and the timing change however.  Lots of variables involved.  You'd have to set it by trial/error to get the advance you're looking for.
-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.

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Re: Dolmar 112
« Reply #25 on: April 14, 2015, 11:14:13 pm »
Wider gap will indeed advance the timing.  Don't think there's a direct/constant correlation between the gap increase and the timing change however.  Lots of variables involved.  You'd have to set it by trial/error to get the advance you're looking for.

Thanks Aaron.

  I bet there is a direct relationship between the two but it would have to take a lot of testing to figure it out. 
So I will just let it be.   Not that important.   
PP 505, 475, 445.

Offline 660magnum

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Re: Dolmar 112
« Reply #26 on: April 14, 2015, 11:56:46 pm »
A wider gap advances the timing
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

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Re: Dolmar 112
« Reply #27 on: April 15, 2015, 09:47:38 am »
A wider gap advances the timing

Thanks Jim.
PP 505, 475, 445.

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Re: Dolmar 112
« Reply #28 on: April 15, 2015, 06:26:39 pm »
I took the Dolmar 112 out and noodled some rounds with it and I think that is the best I have seen this saw run since I have owned it.   I was going to reset the points a little wider but have changed my mind seeing how good it is running and how well it now idles. 
Thanks for the replies guys.
PP 505, 475, 445.

Offline 660magnum

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Re: Dolmar 112
« Reply #29 on: April 15, 2015, 06:36:05 pm »
+1
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

 

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