GM 7.4 Marine Engines

GM 7.4 Marine Engines

GM 7.4 Marine Engines
SKU:
ATK-DM32.1
$4,843.99
Availability:
Ship 7-10 Days
Ships next business day if ordered in the next:

Frequently Bought Together

  • Choose Options

GM 7.4 Marine Engines

All ATK Marine Engines are inspected and ensured to be the highest quality of marine engines. ATK is a leading manufacturer of marine engines and design engines for performance and long lasting life is a priority. Marine environments versus automobile applications require a different type of engine construction. These engines need to be able to stand the rigors and conditions of marine environments and these ATK GM 7.4 marine engines have just what you need. There are over 150 quality control steps involved in ensuring an engine is ready for resale. There are many steps involved in remanufacturing each ATK engine including the GM 7.4 Marine Engine.

The GM 7.4 Marine Engine has been used in marine applications since 1986 and designed to meet or exceed O.E Specifications. All engine parts are rigorously inspected and tested to ensure top quality. The engine blocks and cylinder heads are magnafluxed to determine if there are any cracks. Camshafts bearings are examined to ensure accurate center-to center clearance and precision ground or replaced to maintain the O.E. profile. Pistons and rod assemblies are blanched to minimize engine vibration. Timing belts, chains, and gears are all replaced with new parts.

No ATK engines including the GM 7.4 Marine Engine are shipped out without being run through rigorous testing and quality control processes for compression, oil leaks, unusual engine noise or vibrations and ensure all parts are in good original working order before shipment. Oil pump, oil pump kit, and installation gasket set are supplied with each engine. Free freight available in the continental U.S.and there is no core charge.

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
  • Camshafts precision ground or replaced with new to maintain the O.E. profile
  • Tested for compression, oil pressure, oil leaks, unusual engine noise, and general operating condition before shipment
  • 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

Call Customer Service for more details 1-877-388-2628

# Year Description Part #
1 1973-1990 GM 7.4 / 454/ 330HP Reverse rotation rotation, Mark IV, 2 pc rear seal, flat tappet, 10 bolt front cover, round intake port. 2 bolt main. Use DM25 for Std rotation Casting number: 959, 445, 286, 775, 289 ATK-DM32
2 1973-1990 GM 7.4 / 454/ 330HP Std rotation, Mark IV, 2 pc rear seal, flat tappet, 10 bolt front cover, round intake port. 2 bolt main. Use DM32 for Reverse rotation Casting number: 959, 445, 286, 775, 289 ATK-DM25
3 1974-1990 GM 7.4 / 454/ 415HP Std rotation, HP Engine, OE head 781, HP cam lift .489 int / .520 ex, Duration 224.  Casting number: 445 ATK-HP50
4 1991-1997 GM 7.4 / 454/ 330HP Reverse rotation, Gen V, 4 bolt main, 1 pc rear seal, oval intake port, flat tappet, steel timing cover. Use DMC5 for Std rotation Casting number: 182, 313 ATK-DME1
5 1991-1997 GM 7.4 / 454/ 330HP Std rotation, Gen V, 4 bolt main, 1 pc rear seal, oval intake port, flat tappet, steel timing cover. Use DME1 for Reverse rotation Casting number: 182, 313 ATK-DMC5
6 1996-2003 GM 7.4 / 454/ 330HP Std rotation, Gen VI, 4 bolt main, electric fuel pump, head casting 297, oval intake port, 6 bolt aluminum front cover. Casting number: 297 ATK-DMK2
7 1996-2003 GM 7.4 / 454/ 330HP Std rotation, Gen VI, 4 bolt main, electric fuel pump, head casating 156, oval intake port, 6 bolt aluminum front cover. Casting number: 297 ATK-DMK1

How to Video

California Residents: warning sign WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov

Other Details

Google Product Type:
Engines

Product Reviews

Questions & Answers