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Mercruiser Engine Couplers
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Sierra 18-2171 Engine Coupler for Early Mercruiser GM (Chevy) Engines 76850A2
$193.00 $153.95 
18-2171
Sierra 18-2171 Engine Coupler for Early Mercruiser GM (Chevy) Engines, Replaces Mercruiser part # 76850A2. For all early GM (Chevy) Engines that had 3-1/2" crank shaft bolt pattern and 12-3/4" flywheel diameter. Early GM (Chevy) 4-cyl, 6-cyl and 8-cylinder engines. (Engines with 2-piece rear main seals). Do not use this coupler if you have a MR/Alpha/Bravo with "Triangular" 3-bolt coupler.
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Sierra 18-2321 Engine Coupler (Without Yoke) 3.0-Liter 4-Cylinder GM (Chevy) Engines 1990-1997 with 12-3/4" Flywheel and Mercruiser Alpha Sterndrive
$224.00 $178.95
18-2321
Sierra 18-2321 Engine Coupler (Without Yoke) fits 3.0-Liter 4-Cylinder GM (Chevy) Engines 1990-1997 with 12-3/4 Flywheel and Mercruiser Alpha Sterndrive. Replaces Mercruiser # 12632A6. Replacement for Mercruiser GM (Chevy) 4-cylinder (3.0-Liter) 1990-1997 engines with 1-piece rear main seal, 3" crankshaft bolt pattern and 12-3/4" flywheel diameter. (Same as 18-2195 but with out yoke). Note: NOT for Mercruiser 4-cylinder 3.7-Liter (Aluminum Block) engines.
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Sierra 18-2195 Engine Coupler Kit (With Yoke) 3.0-Liter 4-Cylinder GM (Chevy) Engines 1990-1997 with 12-3/4" Flywheel and Mercruiser Alpha Sterndrive
$362.00 $288.95
18-2195
Sierra 18-2195 Engine Coupler Kit (With Yoke) fits 3.0-Liter 4-Cylinder GM (Chevy) Engines 1990-1997 with Alpha Sterndrive. Replaces Mercruiser part # 12632A7. Coupler and new style "yoke" for GM (Chevy) 4-cyl (3.0-Liter) 1990-1997 Engines with with 1-piece rear main seal, 3" crankshaft bolt pattern and 12-3/4" flywheel diameter. (If you have late style "yoke" see part # 18-2321 sold with out yoke). Note: NOT for Mercruiser 4-cylinder 3.7-Liter (Aluminum Block) engines.
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Sierra 18-2323 Engine Coupler Kit (Without Yoke) 3.0-Liter, 4.3-Liter, 5.0-Liter and 5.7-Liter Engine with 14" Flywheel and Mercruiser Alpha Sterndrive
$277.00 $220.95
18-2323
Sierra 18-2323 Engine Coupler Kit (Without Yoke) 3.0-Liter, 4.3-Liter, 5.0-Liter and 5.7-Liter Engines with 14" Flywheel and Mercruiser Alpha Sterndrive. Replaces Mercruiser part # 18643A5, without yoke. Late model GM (Chevy) 3.0-Liter, 4.3-Liter, 5.0-Liter and 5.7-Liter engines with 3" crankshaft bolt pattern and 14" flywheel and 1-piece rear main seal.
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Sierra 18-2175 Engine Coupler Kit (With Yoke) 3.0-Liter, 4.3-Liter, 5.0-Liter and 5.7-Liter Engine with 14" Flywheel and Mercruiser Alpha Sterndrive
$354.00 $282.95
18-2175
Sierra 18-2175 Engine Coupler Kit (With Yoke) 3.0-Liter, 4.3-Liter, 5.0-Liter and 5.7-Liter Engine with 14" Flywheel and Mercruiser Alpha Sterndrive. Replaces Mercruiser part # 18643A7. Supplied with new style "yoke". Fits late style GM (Chevy) 3.0-Liter, 4.3-Liter, 5.0-Liter and 5.7-liter engines with 14" flywheels, 3" Flywheel bolt pattern and 1-piece rear main seal. Also some early 7.4-Liter engine using Alpha Sterndrive. (Note: if you have newer yoke, see Coupler part # 18-2323 sold with out yoke).
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Sierra 18-2412 Mercruiser Engine Coupler (BRAVO) 861523A9
$430.00 $343.95
18-2412
Sierra 18-2412 Mercruiser Engine Coupler (BRAVO) 861523A9. Replaces Mercruiser part #'s 18311A17 and 861523A9. For: All Bravo V-8, 5.0-Liter, 5.7-Liter, 6.2-Liter, 7.4-Liter, (454 cu.in.) and 8.2-Liter (502 cu.in.) Sterndrive Engines.
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Sierra 18-2172 Mercruiser Engine Coupler Kit 14505A2
$283.00 $225.95
18-2172
Sierra 18-2172 Mercruiser Engine Coupler Kit. Replaces Mercruiser part # 14505A2. Use ONLY when you are replacing older GM (Chevy) 2-piece rear main seal V-6 and V-8 engines (which had a 3-1/2" crankshaft bolt pattern) with a newer 1-piece rear main seal engine that has the smaller 3" crankshaft bolt pattern. Comes with studs, washers and nuts.
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Sierra 18-2173 Engine Coupler for Mercruiser with FORD V-8 Engines 59826A3
$312.00 $248.95
18-2173
Sierra 18-2173 Engine Coupler for Mercruiser with FORD V-8 Engines. Replaces Mercruiser part # 59826A3. For Ford V-8 Based Engines ONLY, do not use in GM or Chevy applications. Coupler bolts to crankshaft studs.
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Sierra 18-2413 Engine Coupler (Early Mercruiser 470's) 69354A2
$409.00 $326.95
18-2413
Sierra 18-2413 Engine Coupler (Early 470's). Replaces Mercruiser part # 69354A2, For: 470, 485 (224 cu. in.), 3.7-Liter 4-cylinder "aluminum block" engines, s/n 4208730-6218036 (1976-1982).
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Sierra 18-2414 Engine Coupler (Late 470's Mercruiser Engines) 97432A2
$394.00 $314.95
18-2414
Sierra 18-2414 Engine Coupler fits Later Model 470's Mercruiser Engines. Mercruiser 3.7-Liter (224 cu.in) , 4-cylinder "aluminum block" engines (1983-1989), Replaces Mercruiser part # 97432A2. For 165, 170, 470 (s/n 6170297 and up).
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29 Edgar Avenue - Riverhead, NY 11901 - toll free: 800-382-9335 - p: 631-722-5700 - fax: 631-722-5719 or Email: sales@partman.com
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