My question is about my 20 year old Sears 16hp, two cylinder garden tractor. Can you help?
It misses, pops, and stalls, and will not run under load. I have replaced the plugs, gas, and adjusted the mixture according to the manual (In untill it misses, then out 1/2 turn).
I observed that both plugs fire acrross the gap. The engine runs well off the left cyclinder however the right cylinder seems to miss-fire or not fire, especially after the engine warms. It runs better when the mixture is very rich, or the choke is on full. Ignition is from a Magnetron. The compression on both cylinders is 35 pounds. The carburetor is a simple down-draft to a two-tube manifold.
What do you think may be wrong?