|Bellow Universal Joint Mercruiser Without Ridge 1973 and Earlier 36223A2|
U-Joint Bellows for a Mercruiser Sterndrive.
Fits all # 1 units without Ridge (s/n 3443920 & below) (1967-72).
The ridge is a small half round bump on the inside of the below where the clamp goes that fits into a groove on the transom and bell housing to help seal the bellow. In 1974 Mercruiser updated the units to all have this "ridge".
Replaces Mercury Quicksilver # 36223, 36223A1, 36223A2; GLM # 89040;