Sierra Part Number 18-2323. The same as 18-2175 without Yoke. Hardware Included. Replaces: Mercury 18643A5 and Marine Power 0007-990F7. Flexplate-style for late model, small crankshaft bolt pattern-style engines.
For Older model MC-1 & R/MR/Alpha One drives with older Chevy & GM V6 & V8 engines with 2 pc. rear main seals. This coupler is used on pre-1985 MerCruiser 350 ci or 305 ci engines, with what is commonly called a "two-piece rear main seal" or "split seal". Replaces Mercruiser 76850A2, 32492A5, and Sierra 18-2171.
Mercruiser Bellhousing Shift Arm for 1983-91/1996-98 R/MR/Alpha One & Alpha Gen II bell housings. Replaces Mercury 45518A3, 45518A2, 45518B3, 45518B2, 45518A1, Sierra 18-2161, GLM 21140, Mallory 9-72153.