OMC Sterndrive/Cobra Engine Couplers

Your Price: $202.79
Save: $61.79
(23% Off $264.58)
Part # 18-21752-1 ValueShip™ Eligible
Fits: Volvo Penta 4.3L (1986-98), 5.0L (1986-88, 1998), 5.7 (1986-92,1994, 1996-98)
Replaces OEM part #
  • Volvo Penta 3858437-1
Your Price: $358.73
Save: $96.34
(21% Off $455.07)
Part # 18-21753 ValueShip™ Eligible
Fits: Volvo-Penta 5.0L & 5.8L (1989-96)
Replaces OEM part #
  • Volvo Penta 985727
  • Volvo Penta 3853862-5
Engine Coupler - Sierra
Your Price: $430.30
Save: $100.23
(18% Off $530.53)
Part # 18-21755
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Only available from Sierra, this engine coupler fits OMC Cobra sterndrive applications using a 2.3L Ford engine between 1987 and 1990. It is a direct OEM replacement.
Your Price: $600.17
Save: $117.77
(16% Off $717.94)
Part # 18-21754
Replaces OEM part #
  • OMC 986232
  • OMC 984537
Fits: 7.5L / 460 King Cobra 1987-1990.

No longer available from OMC. Direct replacement to OEM original. No modification required.

Your Price: $198.47
Save: $42.59
(17% Off $241.06)
Part # 18-21751 ValueShip™ Eligible
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I changed my engine and the coupler doesn't fit the new flywheel. The bolt pattern on the coupler is smaller than the bolt pattern on the flywheel. What coupler would I need to replace my 984290 coupler to fit the new flywheel pattern? The engine is a 1971 or 1979 Chevy 350 small block.?
This would probably require the help of a technician. Reason being is there is no way for us to match up a new flywheel with a coupler. We can only cross reference OEM numbers. You can post a question like this to our forums at or contact a local technician.
Does the -5 make a difference on the part number. Mine does not have that and I believe I have a 1998 model engine.?
If you mean the OEM number with the "-5" then no it doesn't. This should still cross reference with your OEM number.
Is this replacement part for a 1987 5.7 with cobra out drive?
Yes, this should work just fine with that application, among a few other Volvo Penta or OMC/Cobra applications.
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