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Trimmer Blowing out rubber pieces

Posted by gght z7a AL (My Page) on
Thu, Aug 16, 12 at 21:26

I thought it was flooded, so I took out the spark plug and pulled the rope a few times to clean out any gas. I noticed small remnants of rubber fly out of the spark plug hole. The pieces are a soft, black rubber, somewhat latex in texture but thicker than a latex glove. What do you think that is?


Follow-Up Postings:

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RE: Trimmer Blowing out rubber pieces

Please post a picture of the rubber.


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RE: Trimmer Blowing out rubber pieces

  • Posted by gght z7a AL (My Page) on
    Thu, Aug 16, 12 at 23:32

pic attached


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RE: Trimmer Blowing out rubber pieces

Look in the breather and etc to see what might be missing. If it was run w/o a breather, what could have been sucked into the cylinder? Was this discovered due to the trimmer having problems? If so, what was happening or had happened. Is the trimmer still running OK?


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RE: Trimmer Blowing out rubber pieces

If the air cleaner has always been in place, and it is
a fairly new machine, then it could have gotten there
at the factory. Wipe one of the pieces off with some
solvent to see if it was originally black, or was
carbonized during the previous running of the machine.
Strange. . . very strange.


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RE: Trimmer Blowing out rubber pieces

  • Posted by gght z7a AL (My Page) on
    Sat, Aug 18, 12 at 21:24

It's apparently Black RTV Silicon gasket.


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RE: Trimmer Blowing out rubber pieces

  • Posted by gght z7a AL (My Page) on
    Sat, Aug 18, 12 at 21:24

Ok, I broke down the engine and I found the source of the "latex" It appears to be a gasket on the cylinder cover. See pic. Forgive my ignorance as I've never broken down an engine beyond the carb but is this a gasket you buy or is it one which is self made with some "liquid" gasket material?


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RE: Trimmer Blowing out rubber pieces

The Brand, Model and Parts List/Diagram should answer the questions. Please share what you find. I would say it ran too hot but the other parts are not showing excess heat from what I can see. The type of gasket will be interesting.

My latest crankcase related experiment was interesting. The cyl and crankcase was one casting with a side cover vs Removing A Jug. There Is Some Interesting New STUFF Out There!!


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RE: Trimmer Blowing out rubber pieces

  • Posted by gght z7a AL (My Page) on
    Sun, Aug 19, 12 at 21:28

There is no gasket part number for the cover, so I bought some Black RTV silicone gasket but will have to wait on putting it on because I had to order a piston ring. I broke one of them or it was brittle one.


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