Mercruiser outdrive parts *Bushing *Shift shaft

GLM P/N 21423 is installed in the upper housing around the shift shaft
Replaces Mercury #23-32632 and Sierra 18-3236
Mercruiser Tech support Exploded view drawings
Compatible with Mercruiser 1, R, MR and Alpha 1 models years 1967 - 1990 (serial numbers up to OD469858)

P/N 21423 - $20.95

Customers who ordered P/N 21423 also purchased:

21421 Outdrive Intermediate Shift Shaft 62104-1

Intermediate shift shaft P/N 21421 is installed in the upper housing, which sits in bushing P/N 21423. Inspect your old part for excessive play and any physical damage and replace if necessary. Replaces OEM 23-32632, Sierra 18-3236. $51.99

87500 Upper gearcase seal kit 26-32511A1

P/N 87500 complete upper housing seal kit contains all seals required when re-assembling your upper gear box. Replaces OEM 26-32511A1, Sierra 18-2648 $24.99

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

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

12110

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

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

Complete repair kit

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

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

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

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