I have a Craftsman tractor, 917.258553, with a Kohler CV15S engine. Starts then over revs and dies. I can keep running at resonable speed if I put cho

[Greg.Rogers]

I am trying to figure out site... bear with me, please. If I put choke on 1/2 I can keep it running but poorly. I replaced carb no change. Acts like a vacuum leak and way too lean, but cant find it using carb cleaner. Any Ideas? Thanks Greg

 

[ILENGINE]

4 stroke engines normally don't over-rev even with a air leak due to governor action. I suspect the fuel issue is a symptom not an issue. I would be leaning more toward a governor issue. And depending on carb jetting an over-rev can demand more fuel than the jet can deliver therefore seeming like a lean run issue.

 

[Greg.Rogers]

Thanks for your reply Ile, that sounds logical. I have no idea how governors work- seems I remember a lawn mower way back when I was a kid, that used a paddle that would pull back throttle using air. I am thinking about going to our local library and reading about small engines. I have 2 mowers that over rev, this one and a small push mower.

 

[slomo]

Doesn't this go in the Kroller section?