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NEW Base Marine Engines

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    7.4L  (L29) Marine Engine 7.4L  (L29) Marine Engine 7.4L  (L29) Marine Engine 7.4L  (L29) Marine Engine 7.4L  (L29) Marine Engine

    GM Marine

    7.4L (L29) Marine Engine

    This is a BRAND NEW 7.4L (L29) Vortec 7.4L (454 ci) marine engine (one-piece rear main seal, oval port heads, roller cam, and roller lifters). This 7.4L L29 Vortec engine is rated at 310-340hp at the crank (depending on intake, carb or EFI, exhaust...

    Was: $10,799.00
    Now: $8,899.00
  • 7.4L (HO) Marine Engine  (385 HP) 7.4L (HO) Marine Engine  (385 HP) 7.4L (HO) Marine Engine  (385 HP) 7.4L (HO) Marine Engine  (385 HP) 7.4L (HO) Marine Engine  (385 HP)

    GM Marine

    7.4L (HO) Marine Engine (385 HP)

    BRAND NEW 7.4L HI OUTPUT base marine engine (standard rotation) made for 1991-2002 marine engine applications. Engine includes 7.4L High output engine block, rectangular port cylinder heads, valve covers, forged steel crankshaft, high performance cam...

    $13,978.00
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The GM base marine engines that Michigan Motorz offers are the EXACT engines that MerCruiser, Volvo Penta, Malibu, Marine Power, Crusader, Indmar, etc., purchase directly from GM Marine Powertrain.

Genuine base marine engines are marinized by GM Marine Powertrain and frequently include the marine oil pan, valve covers, circulation pump, harmonic balancer, cylinder heads and all internal parts, including marine specific parts. OEM's (MerCruiser, Volvo Penta, Marine Power, etc.) purchase these engines from GM and install their own unique accessories (such as exhaust manifolds, ignition systems, etc.), thereby creating their own private label marine engine.