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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 26481
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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I have a Gravely 148Z with a 21 hp Kawasaki engine. It will

Customer Question

I have a Gravely 148Z with a 21 hp Kawasaki engine. It will crank but after a few seconds shut down. When cool it may even run a few minutes before shutting down. What is causing that issue?
Submitted: 1 year ago.
Category: Small Engine
Expert:  Curtis B. replied 1 year ago.

I will assume this is the twin engine?

Expert:  Curtis B. replied 1 year ago.

Engine shuts down for lack of fuel or loss of spark.

Expert:  Curtis B. replied 1 year ago.

Check twin for oil pressure switch that can kill spark.

Expert:  Curtis B. replied 1 year ago.

Next check the solenoid in the carburetor. If it does not stay open, it shuts the fuel off to the engine. Best test for it, is to remove it and plug the hole.

Expert:  Curtis B. replied 1 year ago.

Solenoid has to open as soon as the key is turned on , and has to stay open to keep engine running.

Expert:  Curtis B. replied 1 year ago.

You can hear the solenoid click when key is turned on. Listen for the click. When engine dies, listen for the click as you turn key on and off. No click, no fuel!

Expert:  Curtis B. replied 1 year ago.

If this was a single cylinder engine, the coil could be failing. You would lose spark.