http://www.mercurymarine.com/en/us/engines/inboard-and-sterndrive/mercruiser/See chart below for kits engine couplers and application parts
Alpha 1 Gen 2 Engine coupler
Photo
Description / OEM #
Price
(USD)
Price
(Canadian)
11500 Engine coupler
P/N 11500 Engine coupler
For older Chevy engines (1985 & before) with 2 piece rear main seals
OEM: 76850A2
$187.95
$319.89
11510
P/N 11510 For all Ford engines
OEM: 59826A3
$357.95
$422.89
11520
P/N 11520 Engine coupler
This coupler is used when a new replacement V6 or V8 Chevy with one piece rear main seal is used to replace an older V6 or V8 with a 2 piece rear main seal (1986 & up)