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JohnF2015
JohnF2015, Small Engine Technician
Category: Small Engine
Satisfied Customers: 1013
Experience:  Owner/Service Technician at S & J Small Engines
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Have a gravely zt 48hd mower with Kiwasasaki engine.it

Customer Question

Have a gravely zt 48hd mower with Kiwasasaki engine.it sputters and backfires under load.
It re cranks and runs smoothly but once under load it sputters.the engine has 85 hours
Submitted: 1 year ago.
Category: Small Engine
Expert:  JohnF2015 replied 1 year ago.

Hi, my name is***** will be assisting you.

It sounds like you have a partial blockage in the main jet of the carburetor that is not allowing enough fuel through the main jet when it is under a load. This is the first place that I would go to or look at in repairing your problem.