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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 27758
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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Have a jd1000 hrs starts and runs but it lacks power when it

Customer Question

have a jd(###) ###-####1000 hrs starts and runs but it lacks power when it is under load and it smokes when under load
Submitted: 1 year ago.
Category: Small Engine
Expert:  Curtis B. replied 1 year ago.

Have you ran a cylinder balance test?

Expert:  Curtis B. replied 1 year ago.

Loosen spark plug wires and with engine idling, remove one wire at a time, if engine dies when either wire is removed, the opposite cylinder is not firing, check it for spark and compression.

Expert:  Curtis B. replied 1 year ago.

I suspect engine is only running on one cylinder.