I posted about a month ago before I had to go out of state, but can not find what I said. My wife's 60" JD zero turn mower (Yes it is hers) suddenly lost power when she wanted to use it the end of Sept. The mower had been sitting for 3 months unused while we were gone, ran normally prior leaving and having a lawn service mow while we were gone.
Without a load the engine seemed to sound like it running like normal until a load (engage the blades or climb a hill) both normal conditions when she is mowing. I pulled the plugs (I am involved in Land Speed Racing normal thing for me) one was very clean the other was not but had been firing. Talked with the service manager at the local JD dealership, who suggested the problem may be the carburetor. Cleaned the carb. which did not need it, but no improvement, ran it without the air filter, no improvement. Replaced the pump and fuel lines still no improvement, replaced the plugs before the carb work with no improvement.
Before I left 3 weeks ago a poster suggested that maybe the valve train had excess clearance and perhaps a push rod or two had dropped out of the rocker, pulled the covers off today and all 4 push rods are in place, so I am out of suggestions, does anyone have an idea? The only thing left untouched is the HEI ignition, I have had auto engines with problems but most often it is misfire or no fire.
Appreciate Responses
Without a load the engine seemed to sound like it running like normal until a load (engage the blades or climb a hill) both normal conditions when she is mowing. I pulled the plugs (I am involved in Land Speed Racing normal thing for me) one was very clean the other was not but had been firing. Talked with the service manager at the local JD dealership, who suggested the problem may be the carburetor. Cleaned the carb. which did not need it, but no improvement, ran it without the air filter, no improvement. Replaced the pump and fuel lines still no improvement, replaced the plugs before the carb work with no improvement.
Before I left 3 weeks ago a poster suggested that maybe the valve train had excess clearance and perhaps a push rod or two had dropped out of the rocker, pulled the covers off today and all 4 push rods are in place, so I am out of suggestions, does anyone have an idea? The only thing left untouched is the HEI ignition, I have had auto engines with problems but most often it is misfire or no fire.
Appreciate Responses