Skip to content

Sierra 18-2171 Mercruiser GM Engine Coupler

Save $143.01 Save $143.01
Original price $325.00
Original price $325.00 - Original price $325.00
Original price $325.00
Current price $181.99
$181.99 - $181.99
Current price $181.99

Sierra 18-2171 Mercruiser GM Engine Coupler

  • Engine coupler is used on Mercruiser GM engines except MR; Alpha and Bravo with triangular 3 bolt coupler
  • Fits Mercruiser 153 CID model 110 from 1963 to 1966 with serial number range 1537370-2044033
  • Fits Mercruiser 153 CID model 120 from 1964 to 1982 with serial number range 1537370-6229717
  • Fits Mercruiser 181 CID model 140 from 1968 to 1982 with serial number range 2508261- 6229717
  • Fits Mercruiser 181 CID model 3.0L from 1987 to 1989 with serial number range B450801-C856558 crankshaft mounted coupler
  • Fits Mercruiser 229 CID model 185 4bbl from 1983-1984 with serial number range 6330183 - 6919655
  • Fits Mercruiser 305 CID model 228 from 1977 to 1982 with serial number range 4765100 - 6218461
  • Fits Mercruiser 350 CID model 260 from 1978 to 1982 with serial number range 4908850 - 621846
  • Replaces Mercury 32492A2; 32492A3; 32492A5; 38965A1; and 76850A2
  • Replaces Mallory 9-72502

For: All Mercruiser GM Engines; Except MR/ALPHA/BRAVO with "Triangular"; 3-Bolt Coupler. Fits Application:GM inline 4-6; V-6; & V-8 up to 350 cid