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Discussion Starter · #1 ·
Hello - been working on getting my Lawnboy 10685, 4-stroke, ready for the season. New breather tube (was leaking oil), oil change, new drive belt, regreased gearbox, lube wheels etc - running great.
However, the engine is crazy LOUD. It has been loud for a while now, but it is worrying me now (that I have spent all this time and $$ on tuning it up etc). Not muffler noise loud, but engine/piston loud. Runs smooth and strong, starts right up, no smoke, self propel system rocks with the new belt and regreasing - just the engine noise it horrible. It's not smoking or anything.

Could it be the valves? If so, how do I check / replace them?

Appreciate the help.

~Julian
 

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Discussion Starter · #3 ·
Hmmmm (****!) it's been doing it for a long time now.
Guess there is nothing else to do but use the heck out of it until it blows?
 

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Don't overlook the easy stuff.
Blade is tight?
Blade is not hitting something else that came loose under the deck?
 

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If you've got rod knock, and it sounds like you do, your engine's days are numbered. I'd start lookin' around for a replacement.
 
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