Question about Garden
Your knock may be a fuel knock. I would start buy removing the carb. and cleaning it. After you get the carb. off and take the fuel bowl off, check for crud in the main jet, the crud holding the float down letting to much fuel by. I think this is one reason it is worse when it is cold. If that does not do the trick, next thing to check for would be a carbon build up in the head. Pull one spark plug and look down in the cyl. see if you see *** and white deposits, and build up. Sometimes on some engines you can scratch out a good bit thru the plug hole. Hope this helps.
Posted on Feb 03, 2010
If it is a fairly loud, sharp, metalic knock, it has to do with a bottom end issue. Even with run out within specs, if you have a balance issue, you can have some crank knocking, however I would come closer to believing that it is a rod connection, either at the crank or at the piston, (more than likely at the crank). If the knock is not as I described, such a noise can be made with advanced timing, (which could explain the run away), however ususally if the flywheel slips, it is a ****** isse rather than advance. The run away is likely a carb issue...most likely place to check, the needle seat. If it is leaking or out all together, you will experience run away. If it were me, I would remove the carb and soak in carb cleaner, then blow out with compressed air, and replace all gaskets and seats. One thing....is the governor working? It is designed to engage and keep you at 3600 rpm...If it is not working, something could have broken off in the engine case and may have a play in that knock. (Unlikely, but worth checking). I know I have given you a lot to check, but these engines have a farily simple, But dependable, design, and everything is easy to disassemble and check. Good Luck! I hope you find this to be very helpful!
Posted on Feb 02, 2010
Sounds like a wrist pin on the piston
Posted on Feb 01, 2010
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Posted on Jan 02, 2017
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