MerCruiser 18643A2 18643A5 Alpha One Flywheel Engine Coupler V8 4.3L 5.0L 5.7L Heads Previously installed on a OMC

Previously installed on a OMC GM 3

See last two photos for reference photos

Foam Pads should probably be replaced

73999 Flame Arrestor (superseded to 86270 - which looks a bit different but functionally the same)

1986 1987 1988 1989 1990 1991 1992 1993 260hp Sterndrive

MerCruiser 18643A2 18643A5 Alpha One Flywheel Engine Coupler V8 4.3L 5.0L 5.7L Heads Previously installed on a OMCMerCruiser 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