10 ways to keep your OMC electric shift outdrive running
Check your engine ideal speed this out-drive is one of best built lower units ever made how ever a sure way to kill it is with high ideal speed. Please check your manual for exact rpm. Normal operating rang is 500 to 600 range. Most V8 engines 1974 to 1977 that i owned did great at 550 to 570 RPM. This can be checked with a low end rang car tack sold on Ebay and auto stores. Do not make the mistake of thinking the engine sounds good or an old 40-to-50-year tachometer on the boat is still working fine as most do not.
Add a carburetor return spring or door closing spring form the hardware store to insure the gas cable returns to the same location and without delay each time. The small spring on carburetor is not very reliable.
Change 2 wires coming from forward / reverse shifter to the engine compartment out-drive connection and place plastic tie wraps on the connections.
Add one new wire going from negative on battery terminal to outside of out-dive lower unit case to maintain integrity of the ground.
Check shifter switch contacts by taping on the shifter or just change the micro switch to a new one is the best solution if you don’t have test equipment.
Change starter switch and wire that leads to common on forward / reverse shifter.
Stay away from stainless steel propeller as torque from start to forward and forward to reverse can break clutch spring.
Go easy on throttle when going into reverse gear at dock as this action pull outdrive away from boat wearing out the ball gears.
Use Type C oil only in electric shift lower unit and 70-90 weight oil in upper gear-case and intermediate housing. Thicker oil will help keep the bearings in upper gear-case running longer. Note some repair manuals have error in regard to type C oil in the upper gear-case.