You must know the rotation of your motor before ordering a starter.
Rotation is determined by looking at the engine from the FLYWHEEL end (not the pulley end).
So, if you are standing in front of the engine and looking at the belts and pulleys turning,
and they are turning right hand, you have a left hand (LH) motor.
All "sterndrive" engines are standard left hand rotation engines (counter-clockwise).
Only inboard engines might be right hand (RH) rotation.
Sterndrive engines are MCM engines.
Inboard engines are MIE engines.
Installing Your Starter
Before installing your new starter you need to make sure your flywheel teeth are OK.
Make notes as to how the wires are attached to the old starter.
Turn off the battery switch and remove the old starter.
Disable the engine's ignition system by removing the main coil wire.
Remove all the spark plugs.
Put a large wrench on the main crankshaft bolt as so you can turn the engine in it's normal rotation by hand.
Turn the engine little by little while feeling the teeth on the flywheels ring gear.
There can be NO chipped or broken flywheel teeth.
If you have a damaged flywheel you will have to replace it before installing the new starter.
Once you know the flywheel is OK, remove any paint, rust or corrosion from the mating surfaces.
Coat a little grease on the threads of the mounting bolts and install the starter.
Use care when attaching the wires as not to crack the solenoid.
50-72550R2 Starter Motor $496.80
Remanufactured. Marine Certified
Prestolite design. 9-tooth pinion.
Fits Mercruiser aluminum block 470, 485, 488 engines. Email us your engine serial number to confirm fit.
50-97499R3 Starter Motor $314.45
Remanufactured. Marine Certified
Top mounted, 9-tooth, rear entry (clockwise) design.
Fits Mercruiser 165, 170, 1960 and 3.7L/LX 4-cylinder aluminum block engines.
Fits opposite rotation (RH) GM and Ford MIE (inboard) applications. Email us your engine serial number to confirm fit.
50-806965A4 changes to 8M0090697 Starter Motor $258.35
Bottom mounted, 11-tooth, straight across bolt pattern.
Fits 1963-1997 GM in-line 4 and 6 cylinder engines. Email us your engine serial number to confirm fit.
50-808011A4 changes to 808011A05 Starter Motor $290.60
Delco PG260 L, 9-tooth pinion gear, rear entry.
Fits standrad rotation (Lh0 MIE (inboard) engines. Email us your engine serial number to confirm fit.
50-863007A1 Starter Motor $239.95
Delco PG260 G, 11-tooth pinion gear, bottom mount, offset bolt pattern.
Fits 1996 and newer GM V6 and V8 (305 and 350cid) engines..
Fits 1999 and newer MCM (sterndrive) 3.0L inline 4-cylinder. Email us your engine serial number to confirm fit.
50-864340A2 changes to 863007A 1 Starter Motor $236.80
Delco PG260L, 11-tooth pinion gear, bottom mount, offset bolt pattern.
Fits 1983 and newer GM V6 and V8 engines. Email us your engine serial number to confirm fit.