Fitment: Fit for MerCruiser GM engines with 14" flywheels. Fit for MCM 3.0L (1999‑2016), 4.5L MPI, GM V‑6 & V‑8 (305 & 350 cid) engines (1993‑2015) with Alpha sterndrives.(Don't confuse it for the smaller one for 12" flywheels found on early 3.0L 140hp). Replacement part numbers: for 18643A5 18643A7 18-2323 11532 9-72507. This Engine Coupling Assembly made of high-quality material for long-lasting durability, convenient to use. Note: This item is a replacement part. Please make sure the images are the same with what you want. If not, please do not purchase it even your model is in the described list! Every product has quality inspection before leaving the factory. Customer satisfaction is our tireless pursuit.We will show you a sincere attitude and satisfactory solution.

Replacement for part numbers：

For 18643A5 18643A7 18-2323 11532 9-72507.

Fit for MerCruiser GM engines with 14" flywheels. Fit for MCM 3.0L (1999‑2016), 4.5L MPI, GM V‑6 & V‑8 (305 & 350 cid) engines (1993‑2015) with Alpha sterndrives.(Don't confuse it for the smaller one for 12" flywheels found on early 3.0L 140hp).

Note:

This Engine Coupling Assembly is not original parts, the mention of brand names and any related model designation above is only for purposes of demonstrating compatibility.

NO installation instruction and recommend professional installation.