Engine Coupler

Replaces: 43-853642A2

For: Alpha I (Gen II) (1998-up), 0L100040-up, 1.94:1, 2.40:1 Ratios (20-24 Teeth)

For: Mercruiser Vazer

Replaces: 76850A2

For all GM engines except MR/ALPHA/BRAVO

with "Triangular", 3-Bolt coupler

Used on all older Chevy engines with 2 piece rear main seals

Replaces: 76850A2

Replaces: 69354A2

For: 470 & 485 Engines (224 cu. in.)

S/N 4208730-6218036 (1976-1982)

Replaces: 1831 1A17, 861523A9

Engines with  Bravo drives

Replaces: 18-20233, 29641, 53-29641

  For: Gen II

Replaces: 14-18323

Replaces: 824519-1, 8245191

For: MR Alpha & Gen II

Replaces: 45-41939A1, 45-41939F1

For all #1 units S/N 2791957 & above except MR/ALPHA Units or units which have been retro-litted with MR/ALPHA lower units. Also for 165 (6 cyl.) S/N 2763442 & above.

Replaces: 24-30893

1/MC-1/R/MR/Alpha Mercruiser/Gen II lower S/N D469859-F679999 Mercruiser Vazer

Replaces: 17-30632, 17-8M0084681, 8M0020941, 8M0084681

Replaces: 14-79447

Replaces: Mercruiser: 807929A1, 807929A2, 821759A2, 821759A3, 821759A4

OEM: 807929A1

Engines: 200 HP (DFI) (3.0L), 200 HP (EFI) (3.0L), 200 HP (Carb) (3.0L), 300 HP (DFI) (3.0L), 300 HP (EFI) (3.0L), 300 HP (Carb) (3.0L)

Replaces: 97432A2

For: 165, 170, 470 3.7L S/N 6170297 & UP (1983-1989) 180, 190, 488, 3.7LX S/N  6170297 & UP (1983- 1989)

Replaces: 45-42634

For all MR/ALPHA Units & older units which have been retro-fitted whith MR/ALPHA lower units.

Replaces: 43433

For: Alpha & Bravo cables

Replaces: 14505A2

Used when replacing V6 or V8 2 piece rear main seal with 3-1/2" crankshaft bolt pattern to a newer 1 piece rear main seal engine with 3" bolt pattern