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****Freshwater Used Parts****
whereas 389957 is this same shaft externally except it is not drilled internally for the hydro-mechanical shift spring
metal construction
Washers 12-45737
Michigan Wheel 992004
MerCruiser 18643A2 18643A5 Alpha One Flywheel Engine Coupler V8 4.3L 5.0L 5.7L Engine Mounts ****Freshwater Used Parts****MerCruiser V6 & V8 (1987 1998) Engine coupler for 14" Flywheels and engines that have a single piece rear main oil seal. If you have specific questions on compatibility, feel free to contact us. This is the 18643A2 Model the A2 Model as the A5 had that tube sticking out of it which covered the yoke shaft. The A2 Model didn't have the greaseable tube, but you can really use either as they are still interchangeable. Sierra 18 2323 equivalent Note the