OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives
- Mercruiser Alpha 1 Gen 2 transom kit
Alpha One Generation 2 bell housing with
transom service parts and install video
Updated May 9 2026
- Bell housing kits include all rubber bellows with hose clamps
- Gimbal bearing and oil seal included
- Adhesive glue is required on rubber to prevent hoses from coming loose (shown below)
- Install / removal video located at bottom of page
Mercruiser Alpha 1 Gen 2 transom bell housing kit
Photo
Description
OEM number
Price
(USD)
Price (Canadian)
P/N 21960
Alpha 1 Generation 2 bellows, gimbal bearing and gasket
1991 and up, serial numbers 0D 469859 up
30 – 803099 T1
Parts included:
21905 Gimbal housing bearing
39622 Outdrive installation gasket kit
47110 3/4 inch water hose
89050 Drive shaft, shift cable
85910 Oil seal
89181 Sleeve
89180 Exhaust
21905 Gimbal housing bearing
39622 Outdrive installation gasket kit
47110 3/4 inch water hose
89050 Drive shaft, shift cable
85910 Oil seal
89181 Sleeve
89180 Exhaust
$219.99
$ 301.89
21960-90200-189031
P/N 21960 – K1
Bellows kit includes 90200 hinge pin tool and 92 – 86166 Q1 bellows adhesive
Years 1991 and up, serial numbers 0D 469859 and up.
30 – 803099 T1
Parts included:
90200 Hinge pin tool
92 – 86166 Q1 Bellows adhesive
21905 Gimbal housing bearing
39622 Outdrive installation gasket kit
47110 3/4 inch water hose
89050 Drive shaft, shift cable
85910 Oil seal
89181 Sleeve
89180 Exhaust
90200 Hinge pin tool
92 – 86166 Q1 Bellows adhesive
21905 Gimbal housing bearing
39622 Outdrive installation gasket kit
47110 3/4 inch water hose
89050 Drive shaft, shift cable
85910 Oil seal
89181 Sleeve
89180 Exhaust
$239.99
$329.99
39622 Bell housing gasket kit
Contains:
O-ring P/N 81180
(2) 25 – 35027
O-ring P/N 81180
(2) 25 – 35027
Gasket P/N 39622
(1) 27 – 94996 A2
(1) 27 – 94996 A2
Gasket P/N 31160
(1) 27 – 35982
(1) 27 – 35982
$9.95
$13.99
89180 Exhaust
P/N 89180
Universal joint bellow (comes with clamps & sleeve)
OEM: 816431 A1
$44.95
$ 53.89
Photo
Description
Install / removal video by Tech service rep Wayne Coll
This video was shot as a high school project by daughter Justine Coll about 10 years ago.
My wife purchased the 28 foot twin engine boat at an auction and booked mooring at Ontario Place in Toronto Canada with out even looking at the outdrive or engine.
People who purchased the above also purchased the following:
Photo
Description
OEM number
Price
(USD)
Price (Canadian)
90360 Bellows expander tool
Installs the exhaust bellows on the MC-1, R. MR and Alpha 1 outdrive units
OEM 91 – 45497 A1
OEM 91 – 45497 A1
$129.95
$ 106.89
90110 Shift cable tool
P/N 90110
GLM Marine aftermarket stern drive gimbal housing tool used to remove and install shift cable on Mercruiser outdrive units.
OEM #91 – 12037
$33.95
$ 47.89
90200 Hinge Pin Tool
$17.95
$ 29.89