OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives
- OMC 400-800 gears upper gear case
GLM Marine after market parts for upper gear case repair
Updated May 12 2026
- New OMC 800 Stringer upper gear case 21/16 gear set for V8 5.7L 350 GM or 5.8L 351 Ford engine.
- Manufactured by GLM Marine in the United States, this gear set replaces OEM 982261.
- Up to a 1 hour of technical support for installation by phone
- Other gear ratios for all other engines available.
- Basic repair installation cost is available.
- OMC 400 – 800 gear set installation video is available on YouTube.
OMC upper gear case gear set with
bearing retainer assembled
OMC gear set with and with out seal kit
Part number and Description
Credit card payment for shipping in USA
Credit card payment for shipping in Canada
87650 Upper gearcase 1973-1986 seal kit
$79.99 us
$109.99
22510 Gear Set 350 Chevy
$595.96 us
$821.96
22530 Stringer 800 V6
$595.96us
$583.89
22512 5.0 Ford / GM
21/17 gear set.
Click on picture to see
all gear ratios and hp. ratings.
Pinion 909652
Drive gear 989186
$595.96 us
$821.96
$595.96 us
$ 821.96
$350.96 us
$ 480.96
$595.96 us
$ 821.96
OMC Stringer 4 Cylinder 120-140 hp
7F
Gear set 4 cyl.
Call for 1967 – 1977
Pinion 16 tooth
Drive gear 20 tooth
$350.96 us
$ 480.96
22590 OMC 21-16 gears
22590
21-16 ratio
Rebuild assembly parts
Click on picture to see parts and all gear ratios
$1495.95us
$ 1,532.89
27950 Housing
$158.99 us
$ 212.89
