Mercruiser Engine Couplers
Liter/ Model # |
Serial # |
Engine Coupler |
110 | 1537370-2044030 | 18-2171 |
120 | 1537370-6229717 | 18-2171 |
120 (2.5L) | 6229718 & UP | 18-2171 (1) |
120 (2.5L) | 6229718 & UP | 18-2195 (8) |
120 (2.5L) | 6229718 & UP | 18-2172 (4) |
140 | 2508261-6229717 | 18-2171 |
140 (3.0L) | 6229718 & UP | 18-2171 (1) |
140 (3.0L) | 6229718 & UP | 18-2195 (8) |
140 (3.0L) | 6229718 & UP | 18-2172 (4) |
140 (6 Cyl) | 1538930-1725960 | 18-2171 |
3.0L/3.0LX | C856559-F000000 | 18-2195 (6) |
150 | 1666495-2048046 | 18-2171 |
160 | 2048022-2770031 | 18-2171 |
165 (6 Cyl) | 2770032 & UP | 18-2171 |
175 (4.3L) | B527955 & UP | 18-2175 (7) |
470 (224 CID) 3.7L | 4208730- 6218036 | 18-2413 |
485 (224 CID) 3.7L | 4208730- 6218036 | 18-2413 |
165 3.7L | 6170297 & UP | 18-2414 |
170 3.7L | 6170297 & UP | 18-2414 |
470 3.7L | 6170297 & UP | 18-2414 |
4.3L (Generation II) | D714107 & UP | 18-2175 (7) |
185 (229 CID) | 6330183 & UP | 18-2171 |
185 (262 CID) | A331455 & UP | 18-2171 (1) |
185 (262 CID) | A331455 & UP | 18-2175 (9) |
185 (262 CID) | A331455 & UP | 18-2172 (5) |
888 Ford (188 HP) | 3108723 & UP | 18-2173 |
190 | 1564539 -1730903 | 18-2171 |
898 (198 HP) | 4762210 & UP | 18-2171 (1) |
898 (198 HP) | 4762210 & UP | 18-2175 (9) |
200 | 6218462 & UP | 18-2171 (1) |
200 | 6218462 & UP | 18-2172 (5) |
200 | 6218462 & UP | 18-2175 (9) |
200 (5.0L) | B525982 & UP | 18-2175 (7) |
205 (262 CID) | A331455 & UP | 18-2171 (1) |
205 (262 CID) | A331455 & UP | 18-2172 (5) |
205 (262 CID) | A331455 & UP | 18-2175 (9) |
205 (4.3L) | B5257955 & UP | 18-2175 (7) |
205 (4.3L) (Generation II) | D714370 & UP | 18-2175 (7) |
225 | 1539620-2694014 | 18-2171 |
225 | 3385721 & UP | 18-2173 |
225 S Ford | 3385721 & UP | 18-2173 |
228 | 4765100-6218461 | 18-2171 |
228 | 6218462 & UP | 18-2171 (1) |
228 | 6218462 & UP | 18-2175 (9) |
228 | 6218462 & UP | 18-2172 (5) |
230 | 6218462 & UP | 18-2171 (1) |
230 | 6218462 & UP | 18-2175 (9) |
230 | 6218462 & UP | 18-2172 (5) |
230 (5.0L) | B525982 & UP | 18-2175 (7) |
233 Ford | 4173000 & UP | 18-2173 |
250 | 4768000-4908849 | 18-2171 |
260 | 4908850-6218461 | 18-2171 |
260 | 6218462 & UP | 18-2171 (1) |
260 | 6218462 & UP | 18-2175 (9) |
260 | 6218462 & UP | 18-2172 (5) |
Mercruiser w/ Bravo Drive | - | 18-2412 |
260 (5.7L) | B5259812 & UP | 18-2175 (7) |
300 MR | 6668677 & UP | 18-2171 (3) |
300 MR | 6668677 & UP | 18-2175 (10) |
320 EFI | A543604 & UP | 18-2175 (7) |
350 Magnum | A635178 & UP | 18-2175 (7) |
454 Magnum | A631894 & UP | 18-2175 (7) |
5.7L (Bravo) | B525982 & UP | 18-2175 (7) |
Liter/ Model # |
Serial # |
Engine Coupler |
Notes:
- (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
Q:
It's the bolt spread 1.750 apart from each other with a 2.500 center ?
A:
Manufacturer confirms they do not go off bolt pattern on the couplers. They match it by application because it meets OE specifications.
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