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jd425 Kaw. bad cam maybe?

Posted by pismojim2008 (My Page) on
Wed, Sep 7, 11 at 19:43

1996 jd425 20hpKawasaki liq cooled 825hrs.
I mow 3-4 acres each week and been running fine.
I keep my eye on the gauges generally. Last week while finishing a large yard it suddenly bogged down. Quickly glanced at gauges and temp was totally hot. Limped it to the trailer and let it cool. Came back started right up but missed badly when attempting to add throttle. Seems to run mostly on one cylinder. Oil and water were fine. I havn't ckd plugs or wires yet. My brother thinks it is the cam because of the quick temp rise. Visited JD dealer today and service mgr said most likely cam issue. They want a $1000 for the job or I can get a cam kit for $150 plus gaskets, etc.

My question is: Has anyone here done this job? Special tools required? Anything in the line of surprises to expect?

I'm going along with my brother and dealer on diagnosis and willing to dig into this engine with the dealers prompting that this 1996 engine has plastic/nylon timing gear and anything past 450-600hrs tells him it's due.

Any comments/suggestions/information is welcome.....

Follow-Up Postings:

RE: jd425 Kaw. bad cam maybe?

Go to and find your free Kaw service manual.

RE: jd425 Kaw. bad cam maybe?

I guess the next step is to pull some valve covers and have a look. And be sure that there is no water in the oil.

RE: jd425 Kaw. bad cam maybe?

Thanks mownie...I'll see if they have a manual for this engine and also check parts prices. Looks like an great source... appreciate your response.

thanks tomplum

Yes, hope to start dis-assembly and inspection by this weekend. Initially looked for any signs of water on the dipstick after mower sat cold for 24 hours and noticed nothing at that point. Those surprises I mentioned might be hiding inside huh...:) I appreciate you pointing this out and keeping me focused. This will be my first experience with this type of engine.

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