1990 Reinell 4.3L OMC Cobra engine assembly - exhaust manifolds?

Discussion in 'Sterndrives' started by Leonard Martinez, Jul 30, 2017.

  1. Leonard Martinez
    Joined: Jul 2017
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    Location: Visalia, Ca.

    Leonard Martinez Junior Member

    I just bought a 1990 Reinell bow rider. The 4.3L engine was pulled and rebuilt. Bored out 30 over. I figured out how to install the harmonic balancer, water pump, alternator, power steering pump, flywheel, bell housing, thermostat housing, and now I'm trying to find out what are the right exhaust manifolds to buy? My out drive assembly is OMC Cobra, so I've been buying OMC parts. Can anyone point me in the right direction?
     
    Leonard Martinez, Jul 30, 2017
    #1
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    gonzo, Jul 30, 2017
    #2
  3. Leonard Martinez
    Joined: Jul 2017
    Posts: 8
    Likes: 0, Points: 1
    Location: Visalia, Ca.

    Leonard Martinez Junior Member

    Sierra and Osco, what is that?
    No the guy I bought the boat from said the manifolds were no good and reason why he rebuilt the engine. This is why I'm having a hard time figuring out the correct ones to buy.
     
    Leonard Martinez, Jul 30, 2017
    #3
  4. Leonard Martinez
    Joined: Jul 2017
    Posts: 8
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    Location: Visalia, Ca.

    Leonard Martinez Junior Member

    I just found the OMC v6 exhaust kit. 1985-1990 that replaces 1 piece manifolds, but the price is at $749.95. I have it but if I can find them cheaper I'd like to. So I'm shopping around.
     
    Leonard Martinez, Jul 30, 2017
    #4
  5. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Try ebasicpower.com. This are pretty common manifolds, log style or riser. They run in the $200 - $250 range (each), but you can also find good ones on Ebay. Also do a search for Sierra 18-1952-1, which fits both starboard and port side.
     
    PAR, Jul 30, 2017
    #5
  6. Leonard Martinez
    Joined: Jul 2017
    Posts: 8
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    Location: Visalia, Ca.

    Leonard Martinez Junior Member

    Will those Sierra manifolds work to hook up to my boat? The exhaust manifold risers will hook to my boat?
     
    Leonard Martinez, Jul 31, 2017
    #6
  7. PAR
    Joined: Nov 2003
    Posts: 19,126
    Likes: 502, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Post a picture of what you have and we'll see if the Sierra part looks similar.
     
    PAR, Jul 31, 2017
    #7

  9. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    They make equivalent products. Make sure that the numbers correspond to your model.
     
    gonzo, Jul 31, 2017
    #8
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