MerCruiser Complete Drive Shaft Housing Assembly
R/MR/Alpha one - Fits MC-I, R, MR & Alpha One
NOTE: When using the Alpha One Driveshaft Housing Assembly as a replacement on earlier (pre 1983) 4 & 6 cylinder inline models, it will be necessary to replace the standard yoke with a short U-joint yoke (p/n 39385A1). This yoke is not included and must be removed from the old unit or ordered separately.
1.32 ratio | V8 from 300 HP
Aftermarket: AM1547-9412A19
1.50 ratio | V8 up to 300 HP
Aftermarket: AM1547-9412A20
1.65 ratio | 6 Cyl. in-line
Aftermarket: AM1547- 9412A21
1.84 ratio | V6 & 470/485
Aftermarket: AM1547- 9412A22
1.98 ratio | 4 Cyl. in-line
Aftermarket: AM1547-9412A23
Alternative numbers
MerCruiser OEM: 547-9412R22, 5523A67, 8265A17, 9412A22, 9412A36, 9412A19, 9412A20, 9412A21, 9412A22, 9412A23
Aftermarket: 18-2452, 18-2453
