Stripped spark plug threads in lawn mower..

Old 08-01-05, 12:43 PM
Mike Burdick
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Stripped spark plug threads in lawn mower..

Well I guess itís my turn for some bad luck. I replaced the spark plug in my lawn mower and apparently I tightened it too much and stripped the threads in the aluminum head. What is the best method of repair? Is it possible to get a little larger plug and rethread or will a helicoil work? This is a 2-cycle engine so the cylinder is part of the head.

Thanks in advance
Old 08-01-05, 01:18 PM
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i strripped out a bolt on an aluminum carb once and took it to small engine shop. he rethreaded it in about 30 seconds and it worked just fine.
Old 08-02-05, 12:47 AM
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Any way you do it, the head (jug) will need to be removed, so I would reccomend just replacing it. I believe there are helicoils made for this application but I've never used one for a spark plug.
Old 08-02-05, 05:44 AM
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If the spark plug is a tapered seat then you'll have to replace the jug as there is no thread repair kit for these. If it is a standard, gasket type spark plug then you do have the option to repair the threads. I prefer Recoil brand versus Helicoil brand.

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