1976 Volvo Penta B20 2.1L

Discussion in 'Sterndrives' started by thinksi, Sep 18, 2014.

  1. thinksi
    Joined: Sep 2014
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    Location: Wisconsin

    thinksi New Member

    I am interested in swapping out the Volvo Penta engine for a newer engine with more power.
    I am wondering if the block has a common bellhousing bolt pattern.
    ( I would like to install a fuel injected car engine, -GM, Mopar, Honda..)

    Can anyone help me ??
     
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    You will have to make a bellhousing and also adapt the coupler. Further, you should check the various threads about marinizing an engine. GM is easy since you can use a variety of already made equipment. However, you will also need to change the gears and propeller. It is cheaper to buy a complete power package. Also, car fuel injection is pressurized at the tank, marine fuel injection systems are enclosed in the engine and have only a suction line to the tank.
     
  3. thinksi
    Joined: Sep 2014
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    Location: Wisconsin

    thinksi New Member

    Thank you for the info.

    Where could I find a complete power package? Online?

    The boat is running a 5' solid brass prop shaft. Do you think the shaft needs a pillow block to prevent deformation at higher speeds/power settings?

    I believe the transmission has a 2:1 reduction.

    I really appreciate your info....
     
  4. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    What is the diameter of the shaft? The torque applied to the shaft is the limiting factor. PCM may be the best deal.
     

  5. powerabout
    Joined: Nov 2007
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    Location: Melbourne/Singapore/Italy

    powerabout Senior Member

    what sterndrive is on the back, if its a 250/270/280 they all have the same shaft but that means get a 2nd hand bellhousing to suit a chev v8 6 or 4 and it all bolts together.
     
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