GM 3.0 Marine Engine

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GM 3.0 Marine Engine


ATK premium quality marine engines are designed & built specifically for boating. No matter how you use your boat, ATK Marine engines will provide maximum performance & long-term durability. There are over 150 processes involved in the remanufactuing each ATK engine that are desinged to meet or exceed O.E. specifications. 

Featured procedures include

  • Engine blocks are magnafluxed, cylinders bored and precision-honed, and main saddles line-honed to exacting O.E. specifications
  • Camshaft bearings line-bored for accurate center-to-center clearance
  • Engine blocks and cylinder heads precision surfaced to insure proper sealing
  • Cylinder heads magnafluxed or dye checked and machined for three-angle valve seats
  • Crankshafts stress-relieved, precision ground and micro-polished for optimum durability and surface finish
  • Camshafts precision ground or replaced with new to maintain the O.E. profile
  • Each engine is tested for compression, oil pressure, oil leaks, unusual engine noise, and general operating condition before shipment
  • Pistons and connecting rod assemblies are balanced in sets to achieve minimum engine vibration
  • Oil pump or oil pump kit is supplied with each engine
  • Premium installation gasket set is supplied with each engine
  • All bearings are replaced with new
  • Timing belts, chains, gears are replaced with new
  • All rubber products are O.E. quality (i.e. main seals, valve stem seals, cam seals)
  • All ATK remanufacturing facilities are ISO 9001 and QS 9000 certified
  • No Core Charge
  • Free Freight to anywhere in the continental U.S

18 Month No Fault Warranty

  • Unlimited Hours
  • Includes Labor, Towing & Fluids

 Marine Application Chart Below - Call Customer Service for more details 1-877-388-2628

# Year Description Part #
1 1967-2013 GM NEW 3.0 140HP Marine Engine, Std rotation only, Complete with tinware, water circulation pump, distributor, coil, flywheel, damper are installed. Will replace the 2.5 liter and early 3.0 (1967-90) engine with purchase of updated 12 3/4" flywheel and updated engine coupler. 1991-97 must use your original flywheel. ATK-NGM30M

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