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Engine runs very hot with smoke after 5 minutes mowing

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Look for airpath obstructions *(often animal nests) under the recoil cover.

If the airpath is clear check the spark plug. Is the electrode insulator bone white or brownish? A bone white color indicates a lean running engine which means the carb is probably partially blocked and running very lean. Time for a carb cleaning!

If the plug looks good than one other thing could be timing. If you have hit a large rock or tree root you may have caused a timing change by bending or breaking the flywheel key. This should be replaced if found damaged. The key is under the recoil cover under the nut that holds on the flywheel. This might take some power tools and a little extra skill. Proceed only if you are comfortable with this kind of wrenching!

If it isnt one of those three things you may have engine wear or run out of internal bearing surfaces. Also be sure you have clean oil at the correct level for your engine.

Good luck and be careful!

Posted on Oct 12, 2010

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