I have a 1984 mark twain with a omc 3.8 v-6. I just replaced the engine because of a cracked block and now I cant get any upper rpm's from the motor. I never had a chance to try the old motor either to compare. I can barely get it up to 2800.<br />I have new plugs, wires, cap, rotor, points, condensor, coil, and have double checked everything. Compression is good, dwell is good. Timing is on and is advancing. Vacume is fine, no leaks. I am still young but I am pretty damn sure everything is fine that I have done so far. All tune-up specs were followed from book. I also rebulit the carb. I am just out of ideas. It seems like an ingnition or wiring problem to me. Any help is appreciated
