Gm 5.7l Marine Reman Long Block Engine 1980-1985 | Reverse Rotation

  • Size: 5.7L / 350
  • Years: 1980-85
  • HP Rating: 260
  • Block Casting: 909, 979, 776, 777, 371, 778, 535, 551, 627, 058
  • Notes: Reverse rotation, 2 bolt main, 2 pc rear seal, starboard side dipstick. Valve cover bolts on perimeter. Use USM20 for standard rotaion

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Availability: In stock

SKU:USM21

$2,915.00
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Our Long Block Engine Includes:


  • Cam/Main/Rod Bearings  
  • Oil Pump  
  • Timing Gears  
  • Camshaft  
  • Pistons  
  • Valves  
  • Connecting Rods  
  • Piston Rings  
  • Valve Guides  
  • Head Gaskets  
  • Push Rods  
  • Valve Keepers  
  • Lifters  
  • Rocker Arms  
  • Valve Springs  


  • Call us today with any questions and to verify this engine will work for you:

    (631)991-7700

    Name Gm 5.7l Marine Reman Long Block Engine 1980-1985 | Reverse Rotation
    SKU USM21
    Brand GM Marine
    Liters 5.7L
    Block Casting Number 909, 979, 776, 777, 371, 778, 535, 551, 627, 058
    CID 350
    Horsepower 260
    Reverse rotation, 2 bolt main, 2 pc rear seal, starboard side dipstick. Valve cover bolts on perimeter. Use USM20 for standard rotaion

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    Vehicle application fitments

    PartTypeYearMakeEngineSizeRotationFitment Notes
    Engine1981Mercruiser5.7LReverseN/A
    Engine1981Volvo5.7LReverseN/A
    Engine1981Crusader5.7LReverseN/A
    Engine1981Marine Power5.7LReverseN/A
    Engine1981Indmar5.7LReverseN/A
    Engine1981Pleasure Craft5.7LReverseN/A
    Engine1981Chris Craft5.7LReverseN/A
    Engine1981OMC5.7LReverseN/A
    Engine1981Chrysler5.7LReverseN/A
    Engine1981GM5.7LReverseN/A
    Engine1981Ford5.7LReverseN/A
    Engine1982Mercruiser5.7LReverseN/A
    Engine1982Volvo5.7LReverseN/A
    Engine1982Crusader5.7LReverseN/A
    Engine1982Marine Power5.7LReverseN/A
    Engine1982Indmar5.7LReverseN/A
    Engine1982Pleasure Craft5.7LReverseN/A
    Engine1982Chris Craft5.7LReverseN/A
    Engine1982OMC5.7LReverseN/A
    Engine1982Chrysler5.7LReverseN/A
    Engine1982GM5.7LReverseN/A
    Engine1982Ford5.7LReverseN/A
    Engine1983Mercruiser5.7LReverseN/A
    Engine1983Volvo5.7LReverseN/A
    Engine1983Crusader5.7LReverseN/A
    Engine1983Marine Power5.7LReverseN/A
    Engine1983Indmar5.7LReverseN/A
    Engine1983Pleasure Craft5.7LReverseN/A
    Engine1983Chris Craft5.7LReverseN/A
    Engine1983OMC5.7LReverseN/A
    Engine1983Chrysler5.7LReverseN/A
    Engine1983GM5.7LReverseN/A
    Engine1983Ford5.7LReverseN/A
    Engine1984Mercruiser5.7LReverseN/A
    Engine1984Volvo5.7LReverseN/A
    Engine1984Crusader5.7LReverseN/A
    Engine1984Marine Power5.7LReverseN/A
    Engine1984Indmar5.7LReverseN/A
    Engine1984Pleasure Craft5.7LReverseN/A
    Engine1984Chris Craft5.7LReverseN/A
    Engine1984OMC5.7LReverseN/A
    Engine1984Chrysler5.7LReverseN/A
    Engine1984GM5.7LReverseN/A
    Engine1984Ford5.7LReverseN/A
    Engine1985Mercruiser5.7LReverseN/A
    Engine1985Volvo5.7LReverseN/A
    Engine1985Crusader5.7LReverseN/A
    Engine1985Marine Power5.7LReverseN/A
    Engine1985Indmar5.7LReverseN/A
    Engine1985Pleasure Craft5.7LReverseN/A
    Engine1985Chris Craft5.7LReverseN/A
    Engine1985OMC5.7LReverseN/A
    Engine1985Chrysler5.7LReverseN/A
    Engine1985GM5.7LReverseN/A
    Engine1985Ford5.7LReverseN/A