Author Topic: Old Gaskets  (Read 283 times)

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Offline rayvil01

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Old Gaskets
« on: January 03, 2015, 11:34:48 am »
Working on an old Dolmar 112.  Nice saw.  There are a couple of fiber gaskets on the carb that I'd like to replace.  They are intact, but are very compressed.   The gaskets  are no longer available.  I guess the preferred method is to get some gasket material and try to hand-make replacements.  I'm not the best at that.   Are there any other tricks of the trade for this situation?  I'm leery of Permatex for this application.  But, I may be too cautious. 

The two gaskets are important aside from the obvious because the impulse port is milled into the intake and runs through these two gaskets and a plastic boot between them.  This thing passed pressure and vacuum tests like a champ.  But, then it acted on the high end like it had an air leak.  With re-used gaskets this looks to be the best place to start. 

Thanks for your help.

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Offline Cut4fun .

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Re: Old Gaskets
« Reply #1 on: January 03, 2015, 12:01:44 pm »
I dont know much on this. But here is a thread on gasket material  http://chainsawrepair.createaforum.com/ported-saws/looking-for-gasket-material/
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Offline rayvil01

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Re: Old Gaskets
« Reply #2 on: January 03, 2015, 12:11:05 pm »
Thanks.  That's a start.  I appreciate it.

Online jmester

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Re: Old Gaskets
« Reply #3 on: January 03, 2015, 09:34:12 pm »
i have used thin cardboard like a cereal box to seal up a fuel tank on a homelite super wiz 66. just try and get the same thickness. should work just fine.
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Offline 660magnum

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Re: Old Gaskets
« Reply #4 on: January 03, 2015, 10:11:22 pm »
Reinforce paper or cardboard with cling free dryer cloths glued on with gasket maker.
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Offline rayvil01

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Re: Old Gaskets
« Reply #5 on: January 04, 2015, 08:53:06 am »
Thanks, All.  Dryer Sheets.  Never would have thought of that. 

Offline 3000 FPS

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Re: Old Gaskets
« Reply #6 on: January 04, 2015, 10:35:48 pm »
I have a Dolmar 112 I made those same gaskets for.
I went on eBay and bought some fuel resistant gasket material.
I also used a leather punch for the holes.   Like you said the impulse goes through there and a leather punch has a variety of hole sizes.   I have also used a single hole paper punch if a hole that large is needed.
The rest of it I cut out with a razor blade on top of a piece of cardboard.
Take your time and you can make a good looking gasket when done.
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Offline 660magnum

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Re: Old Gaskets
« Reply #7 on: January 05, 2015, 04:44:38 am »
I made those same gaskets for my Dolmar 111/115 a few years ago. I used poly coted card stock from a blister pack.

It has never given any trouble.
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That knowledge can live after us... and that "Pays It Forward".
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Offline farmboy

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Re: Old Gaskets
« Reply #8 on: January 05, 2015, 04:44:23 pm »
Get me the PN's for the gaskets you need I may have them.  I just bought a "Lot" of NOS Sachs Dolmar parts.
Shep

Offline rayvil01

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Re: Old Gaskets
« Reply #9 on: January 05, 2015, 07:29:12 pm »
Thanks for the advice, Everyone.  Great info.   I used to make gaskets on the submarine years and years ago.  But, those were for pipe flanges and were really easy.  A friend got me some hi-temp Garlock.  And, I've broken out the old gasket-punches.  So, I should be good-to-go

Thanks for the parts offer, Shep.  I'm all geared up to give this a whirl.  I'll be in touch if I don't have any luck.  What I could not find for this saw was a chain tensioner screw and pin.  119 213 030, 901 506 554.  If you have those, let me know please.  Thanks again.

 

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