Mercruiser aligning key *Lower unit part

GLM 11080 replaces Mercury 28-30281
Compatible with Mercruiser models from 1970 and up serial numbers 2791957 and up
Tech support Exploded view drawings Search by part number or description here
5 pieces included in pack

Customers who purchased aligning key also looked at:

Prop Shaft Bearing Part 31-30956

Propeller shaft carrier bearing 11410 may be replaced when re-installing the carrier if the old part was damaged during removal. Replaces OEM 31-30956T, Sierra 18-1158.

87510 Seal Kit 26-33144A2

Lower unit seal kit 87510 is required when re-assembling the parts in the bottom end. Replaces OEM 26-33144A2, Sierra 18-2652.

12120 Impeller kit

P/N 12120 Alpha One Gen 1 impeller water pump kit, for 1984-1990 models, serial numbers 6854393-OD469858. Replaces OEM and Sierra 18-3320. $42.99

21950 Alpha 1 adhesive hinge pin tool 30-803097T1

21950 Alpha 1 with adhesive hinge pin tool

P/N 21950K *most popular* Same kit as above, also includes bellows adhesive glue and hinge pin removal/installation tool $199.99

12110 years 1970-1990 46-57234A3

P/N 12110 Mercruiser R MR stern drive water pump kit, for 1970-1983, serial numbers 2663442-6225576. Replaces Mercury and Sierra 18-3317. $44.99

21960 Alpha one Gen 2 kit 1991 up 30-803099T1

P/N 21960 Kit with exhaust, u-joint and shift cable bellows with gimbal bearing and oil seal. Includes outdrive installation gasket. The gimbal bearing is the new sealed type which is maintenance free. Replaces Mercury part number 30-803099T1 $169.99

21960 Generation 2 exhaust u-joint

P/N 21960K *most popular For Generation 2 models only, 1991 and up. Also includes bellows adhesive glue and hinge pin removal/installation $219.99

21450 Shift cable 865436A03

P/N 21450 Complete outdrive lower unit shift cable kit. Includes cable, shift bellow, outdrive installation gasket kit and other parts. Replaces Mercury 865436A03 and Sierra 18-2603. $89.99

11210 1.50 ratio V8

P/N 11210 Outdrive upper housing gears and gear sets. Includes pinion bearing P/N 21560. For 1970-1997 models, serial numbers 3106717-0K999999. Replaces Mercury 43-18410A4 and Sierra 18-2201. $444.99

11500 GM 350-305 5.7L Mercury 76850A2

P/N 11500 Outdrive engine coupler for GM Chevy 4 cylinder, V6 and V8 1985 and older with a 2 piece rear main seal, will NOT work with 1 piece rear main seal type. Circular mount only will not work with triangular mount. Replaces Mercury 76850A2 and Sierra 18-2171. $217.99

Compatible with models with a 1 piece rear main seal:
110 serial number 1537370-204403
120 2.5L s/n 6229718 - Up
140 3.0L s/n 6229718 - up
160 s/n 2048022-2770031
165, 6 cylinder s/n 2770032 - up
185 s/n 6330183 - up
190 s/n 1564539 - up
898 s/n 4762210
205 (262 CID) s/n A331455-B527954
225 s/n 539620-2694014
228 s/n 4765100-6218461
230 (5.0L) 6218462-B525981
250 s/n 4768000-4908849
260 s/n 4908850-6218461
260 (5.7L) s/n 6218462-B525981