MERCRUISER DRIVE SYSTEMS

18-2175(7)
 Model # Serial # SIERRA
Engine Coupler
MERCURY
 Engine Coupler
110 1537370-2044030 18-2171
 76850A2
120 1537370-6229717
18-2171
76850A2
120 (2.5L) 6229718 & UP
18-2171 (1)
76850A2
120 (2.5L) 6229718 & UP 18-2195(8)

 12632A7
120 (2.5L) 6229718 & UP 18-2172(4) 14505A 2
140 2508261-6229717
           18-2171
76850A2
140 (3.0L) 6229718 & UP
            18-2171(1)(1)

76850A2
140 (3.0L) 6229718 & UP 18-2195(8) 12632A7
140 (3.0L) 6229718 & UP 18-2172(4) 14505A 2
140 (6 Cyl) 1538930-1725960
            18-2171
76850A2
3.0L/3.0LX C856559-F000000 18-2195(6) 12632A7
150 1666495-2048046
            18-2171
76850A2
160 2048022-2770031
18-2171
76850A2
165 (6 Cyl) 2770032 & UP
            18-2171
76850A2
175 (4.3L) B527955 & UP 18-2175(7) 18643A 7
470 (224 CID) 3.7L 4208730- 6218036 18-2413 69354A 2
485 (224 CID) 3.7L 4208730- 6218036 18-2413 69354A 2
165 3.7L 6170297 & UP 18-2414  97432A2
170 3.7L 6170297 & UP 18-2414  97432A2
470 3.7L 6170297 & UP 18-2414  97432A2
4.3L (Generation II) D714107 & UP 18-2175(7) 18643A 7
185 (229 CID) 6330183 & UP
18-2171
76850A2
185 (262 CID) A331455 & UP
            18-2171(1)(1)
76850A2
185 (262 CID) A331455 & UP 18-2175(9) 18643A 7
185 (262 CID) A331455 & UP 18-2172(5) 14505A 2
888 Ford (188 HP) 3108723 & UP  18-2173  59826A 3
190 1564539 -1730903
            18-2171
76850A2
898 (198 HP) 4762210 & UP
18-2171(1)
76850A2
898 (198 HP) 4762210 & UP 18-2175(9) 18643A 7
200 6218462 & UP 18-2171(1) 76850A2
200 6218462 & UP 18-2172(5) 14505A 2
200 6218462 & UP 18-2175(9) 18643A 7
200 (5.0L) B525982 & UP 18-2175(7) 18643A 7
205 (262 CID) A331455 & UP
18-2171(1)
76850A2
205 (262 CID) A331455 & UP 18-2172(5) 14505A 2
205 (262 CID) A331455 & UP 18-2175(9) 18643A 7
205 (4.3L) B5257955 & UP 18643A 7    18-2175(9)
205 (4.3L) (Generation II) D714370 & UP 18-2175(7) 18643A 7
225 1539620-2694014
            18-2171
76850A2
225 3385721 & UP 18-2173 59826A 3
225 S Ford 3385721 & UP 18-2173 59826A 3
228 4765100-6218461
18-2171
76850A2
228 6218462 & UP
18-2171 (1)
76850A2
228 6218462 & UP 18-2175(9) 18643A 7
228 6218462 & UP 18-2172(5)

14505A 2
230 6218462 & UP
            18-2171(1)(1)
76850A2
230 6218462 & UP 18-2175(9) 18643A 7
230 6218462 & UP 18-2172(5) 14505A 2
230 (5.0L) B525982 & UP 18-2175(7) 18643A 7
233 Ford 4173000 & UP 18-2173 59826A 3
250 4768000-4908849
            18-2171
76850A2
260 4908850-6218461
            18-2171
76850A2
260 6218462 & UP
            18-2171(1)(1)
76850A2
260 6218462 & UP 18-2175(9) 18643A 7
260 6218462 & UP 18-2172(5) 14505A 2
Mercruiser w/ Bravo Drive
 Round shape
Gm V-8 Engines
-  18-2412
18311A17
861523A9
260 (5.7L) B5259812 & UP 18-2175(7) 18643A 7
300 MR 6668677 & UP
            18-2171(3)(3)
76850A2
300 MR 6668677 & UP 18-2175(10) 18643A 7
320 EFI A543604 & UP 18-2175(7) 18643A 7
350 Magnum A635178 & UP 18-2175(7) 18643A 7
454 Magnum A631894 & UP 18-2175(7) 18643A 7
5.7L (Bravo) B525982 & UP 18-2175(7) 18643A 7
 Model # Serial # SIERRA
Engine Coupler
MERCURY Engine Coupler
Notes: 

MERCUISER ENGINE COUPLER APPLICATIONS NOTE
ALWAYS CHECK ENGINE ALIGNMENT AFTER CHANGING ENGINE COUPLER
(1) : Early Models
(3) : MR Cast Coupling
(4) : MR Stamped Coupling
(5) : General Motors has changed the V-6 and V-8 cylinder block and crankshaft to incorporate a one-piece full circle rear seal. For this change to be made, General Motors had to redesign the cylinder block and crankshaft discontinuing the earlier style engines. Mercury has added engine coupler # 14505-A2 (18-2172/AP# 1847) to compensate for this change in design.
(6) : For engine coupler w/o yoke use 18-2321
(7) : For engine coupler w/o yoke use  18-2323

(8) : Late Models, For engine coupler w/o yoke use 18-2321
(9) : Late Models, For engine coupler w/o yoke use 18-2323
(10) : MR Stamped Coupling, For engine coupler w/o yoke use 18-2323

IF YOU NEED THESE COUPLERS OR HAVE ANY QUESTIONS 
PLEASE CALL 815 726 4400


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