Rebuilt 1978 motor with all other parts off the 1981 original motor. Okay I have 3 spark plugs that are kinda wet and one that is dry but medium brown color. Problem is engine is not running full RPMS like 4800 vs 5400... Use to cut in and out now it just stays out of full power. I have bought a new fly wheel and stator and will have that installed in Dec. But meanwhile I am messing around. I have today replace those blue spark plug wires with the original OMC spark plug wires. Now I have the carbs off and will start cleaning them tomorrow. I am thinking about buying all new jets, and according to book. they would be sizes 28, 34, and 60.. My manual is an original manual so what I would like to know is if those jets sizes are still valid before i order them. Thanks in advance. Oh spark looks okay, compression is around 110 on all 4 cylinders.