Mercruiser engine coupler *GM *Chevy *Ford

Last updated on 6/2/2024, 7:39:06 AM

Mercruiser 6 bolt engine couplers for GM motors older than 1986 with 2 piece rear main seals and all V8 models
Engine couplings for replacing V6 V8 motors with 3-1/2 inch crankshaft bolt pattern to a newer 1 piece rear main seal engine coupler with 3 inch bolt pattern
3 bolt engine coupler kits with triangular mounts including drive shaft yoke for MCM / Mag Alpha One Mercruiser inboard motors
When installing a new or used coupler, you may need to use the engine alignment tool to line it up with the gimbal bearing
Click here for exploded view Mercruiser parts drawings

11500 GM 350-305 5.7L Mercury 76850A2

11500 Coupler Chevy 262 4.3L engine 76850A2

P/N GLM 11500 Chevy / GM coupler replaces Mercruiser 76850A2 $217.99

Use with 1985 and older Chevy engines with 2 piece rear main seals
110 hp. 1537370 to 2044030
120 hp. 1537370 to 6229717
120 hp. (2.5 Liter) 6229718 and up
140 hp. 2508261 to 6229717
140 3.0 Liter OEM number 6229718 and up
150 hp. 1666495 to 2048046
160 hp. 2048022 to 2770031
165 6 cylinder 2770032 and up
175 (4.3 Liter) B5257955 and up
185 hp. 229 CID 6330183 and up
185 hp. 262 CID A331455 and up
190 hp. 1564539 and up
898 198 hp. 4762210 and up
200 hp. 6218462 and up

18-2171 Sierra aftermarket Mercruiser engine coupler

P/N Sierra 18-2171 Chevy coupler for 1985 and older motors with 2 piece rear main seals OEM 76850A2 $399.99

11510 GLM Marine aftermarket Mercruiser engine coupler

P/N GLM 11510 Ford engine coupler OEM 59826A3 $357.95

888 Ford 188 hp. 3108723 up
225 Ford and 225 S Ford 3385721 up
233 Ford 4173000 up

18-2173 Aftermarket Mercruiser engine coupling

P/N Sierra 18-2173 Coupler - All Ford Engines OEM 59826A3 $363.00

11520 Chevy coupler V6-V8 2 piece rear main seal

11520 Chevy coupler 2 piece rear main seal

P/N GLM 11520 Chevy coupler OEM 14505A2 $363.99

Used with 1986 and newer V6 V8 engines with 1 piece rear main seals

120 hp.(2.5L) 6229718 and up
140 (3.0L) 6229718 and up
185 hp. 262CID A331455 and up
200 hp. 6218462 and up
205 hp. 262CID A331455 - B527954
228 hp. 6218462 and up
230 (5.0L) 6218462 - B525981
260 (5.7L) 6218462 - B525981

18-2172 engine coupling

P/N Sierra 18-2172 Chevy coupler OEM 14525A2 $499.99

18-2413 Aftermarket Mercruiser engine coupling

P/N Sierra 18-2413 470 Mercruiser coupler OEM 69354A2 $422.00

Works with Mercruiser 470 / 485 (1976 - 1982) 4208730 - 6218036

11530 GM V6-V8 triangular mount engine coupling

P/N GLM 11530 Coupling with triangular mount, for Alpha One models OEM 118643A7 $399.99
Includes yoke drive shaft
305 MCM 1983 - 1993
350 MCM 1983 - 1993

11532 GLM Marine aftermarket MCM 3 Liter GM 305-350-454 cubic inch engine coupler

P/N GLM 11532 Coupling with triangular mount OEM 18643A5 $299.99
305 MCM 1999 and up
350 MCM 1999 and up

18-2195 Aftermarket Mercruiser engine coupler

P/N GLM 18-2195 470 Coupler with triangular mount including yoke OEM 12632A7 $356.00

Includes yoke
2.5L (1987 - 1989) OB531854 - OC853256, 140 3.0L (1983 - 1986) 6229718 - OB450800
3.0L (1987 - 1989) OB450801 - OC85658, 3.0LX (1990 - 1993) OC856559 - OF000000

18-2321 Aftermarket Mercruiser 4 cylinder engine coupler OEM 12632A6

P/N 18-2321 470 Coupler with triangular mount OEM number 12632A7 $272.00
*Does not include yoke

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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 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. $39.99

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