Trimmer Blowing out rubber pieces

gght(z7a AL)August 16, 2012

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?

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loger_gw

Please post a picture of the rubber.

    Bookmark   August 16, 2012 at 11:00PM
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gght(z7a AL)

pic attached

    Bookmark   August 16, 2012 at 11:32PM
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loger_gw

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?

    Bookmark   August 17, 2012 at 9:30AM
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lbpod

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.

    Bookmark   August 17, 2012 at 12:23PM
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gght(z7a AL)

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?

    Bookmark   August 18, 2012 at 9:24PM
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loger_gw

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!!

    Bookmark   August 19, 2012 at 7:42PM
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gght(z7a AL)

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.

    Bookmark   August 19, 2012 at 9:28PM
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