Lawn Boy runs high rpm

[Mary Wilson]

Hmmm, I ALMOST took mine out of service for a new deck, today. I drained the gas out today, so I could bring it in the cellar. Maybe I should have a look at my gasket, too. I have had this machine for 16 years and have put many, many, MANY hours on it. And I got it, used! I thought it was done. It would be unbelievable if all it needs is a gasket! But my machine has pretty much EXACTLY the same symptoms....

Good job on yours! Persistance pays!

Thanks! If yours has a plastic carburetor it sure would be worth a look. The metal ones pretty well cover up that hole but guess it wouldn't hurt to look at it also. I made a gasket out of a thick piece of cardboard and covered it with rtv.

 

[impalass]

I'm proud to announce the mower is fixed! The problem was an air leak at the base of the carburetor caused by the pulse hole leaking there. My last stab at fixing it involved plugging up the hole with RTV and making a new, thicker gasket for the carb with the hole deleted. I started it up a few minutes ago and it ran normally, actually a bit slow, so I may have to adjust the governor a notch or two. It's set on the fastest of the two settings and is just a little slow. It two cycles in the taller grass like it's supposed to so maybe now all I need to do is adjust. Thanks for the input. Joe

The only hole i see is a small hole above the main venturi which matches the hole in the end cap and my gasket has a small hole. Tell me which hole you plugged in the picture that i posted.

 

[Mary Wilson]

The only hole i see is a small hole above the main venturi which matches the hole in the end cap and my gasket has a small hole. Tell me which hole you plugged in the picture that i posted.

That's a different carb than mine. I plugged up the hole you are referring to since it's not used on that type machine. I think I read it's used on snow blowers. Anyway, my main problem was a leak at the carb flange so I just made sure it didn't leak any more. Sorry about the late reply..