Kawasaki engine in a Cub Cadet push mower


Old 10-28-11, 07:26 PM
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Location: Tennessee
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Kawasaki engine in a Cub Cadet push mower

This one is for anyone who dove into the internals of a 179CC engine on a Cub Cadet push mower.

My neighbor gave me his mower that appeared to have a bad valve or broken ring. It smoked and stalled among other things.

I told him it was all or nothing and I was going to take the engine down to see what may be wrong. He abandoned it anyhow so there was nothing to loose.

I have rebuilt motorcycle engines before and I can get by on what I have picked up over the years but there was something in there that I can't figure out.

The crank shaft drives the cam shaft but off the cam shaft gear there is a smaller plastic gear that has what looks like a centrifugally operated device in the middle of it that is associated to a lever that comes out of the case and has a spring connected to it.

I can only figure this may be an engine load arraignment of sorts that increases engine speed under high load conditions. That is only a guess but I am curious as to exactly what it is.

Has anyone dipped into a Kawasaki engine that deep to know what this gear set up is all about?

Thanks for any assistance.
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Old 10-28-11, 07:32 PM
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It's the governor gear and flyweights. It's what gives the engine gas when a load is applied to maintain rpm.
Old 10-29-11, 06:03 AM
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Yep, that sounds like the governor. Have you found why the engine does not run? Have you found a bad valve or broken ring?

I deleted your post in the motorcycles section.
Old 10-31-11, 04:11 PM
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Join Date: Nov 2009
Location: Tennessee
Posts: 19
Thanks for the info guys. The rings and valves are good, it looks like a blown head gasket between the cylinder and the valve guide channel which must fill with oil pretty good when the motor is running. The gasket is letting oil into the cylinder and it runs for a while before smoking out.

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