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Old 05-20-2019, 05:54 PM
JOHN COOKSON JOHN COOKSON is offline
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Quote:
Originally Posted by tmcdonagh View Post
Thanks Tenders for comments and ideas. Here is a summary of what I have done.

1. Checked compression and all cylinders are at about 90 psi cold.
2. Changed oil and found it to be dirty but not water contaminated.
3. Changed out spark plugs gapped @ 0.03.
4. Replaced spark plug wires, distributer cap and rotor. I have electronic ignition.
5. Treated cylinders with MMO for 30 minutes.
6. Checked spark and found to be good on all cylinders.
7. Checked gas for particulates and water from hose going to electric fuel pump. I have no filter/water separator before the pump. I am working on installing a Racor unit. Fuel seemed clean and waterfree

After all this, the motor starts right up without any complaints. I can run the throttle up to max rpm with no load. When loaded she can handle up to 1/4 throttle or so but maxes out at the midrange rpm. If I push the throttle higher I see no increase in rpm and if I push to 3/4 and beyond, the motor sputters, backfires and quits.
I am now investigating fuel quality, blocked fuel tank vent pipe, weak fuel pump and carburetor issues.

Thoughts?

Thanks,

Tom
Have you checked the advance yet?
Why are you posting the same information in two different threads?

TRUE GRIT
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