I checked compression (125 in both cylinders) and verified my timing marks correct. I believe I found my problem. A single yellow wire leading to a sensor threaded into block had not been routed properly, and it was cut in half by the timing pulley. I caused this problem when I replaced broken timing pulley and belt. I don’t know what that sensor does, but motor was not happy with its wire severed. I repaired wire and routed it correctly this time. Runs good in barrel. True test will be out on the lake when I get boat back in tomorrow. Can anyone tell me what that sensor does ? I need to get a service manual for this motor.
Cyangelo
Cyangelo