GM 7.4 Marine Engines

SKU:
ATK-DM32.1
Availability:
Ship 7-10 Days
Order within and your order ships today!
List Price:
Starting At: $3,594.86
You save

Earn Captains Club Points

Learn More

FREQUENTLY BROUGHT TOGETHER

  • Choose Options

PRODUCT DESCRIPTION

GM 7.4 Marine Engines

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 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 Cancer and Reproductive Harm - P65Warnings.ca.gov

PRODUCT REVIEWS

QUESTIONS & ANSWERS

OTHER DETAILS

Google Product Type:
Engine Parts

CUSTOMERS ALSO VIEWED

GM 5.7 Marine Engines
List Price: $2,369.40
Starting At: $2,367.13

GM 5.7 Marine Engines 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 &...

Choose Options
Starting At: $4,348.90

Ford 7.4 Marine Engines 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...

Add to Cart
GM 5.0 Marine Engines
List Price: $2,421.40
Starting At: $2,351.31

GM 5.0 Marine Engines 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 &...

Choose Options
Starting At: $3,709.04

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...

Add to Cart
GM 4.3 Marine Engines
List Price: $2,407.83
Starting At: $2,083.11

GM 4.3 Marine Engines 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 &...

Choose Options
Ford 5.8 Marine Engines
List Price:
Starting At: $2,225.82

Ford 5.8 Marine Engines 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...

Choose Options
Starting At: $2,878.12

Ford 7.5 Marine Engines 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...

Add to Cart
Ford 5.0 Marine Engines
List Price:
Starting At: $2,225.82

Ford 5.0 Marine Engines 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...

Choose Options
Chrysler 5.9 Marine Engines
List Price:
Starting At: $2,335.48

Chrysler 5.9 Marine Engines 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...

Choose Options
Sierra 18-1953-2 Exhaust Manifold
List Price: $252.99
Starting At: $176.99

Sierra 18-1953-2 Mercruiser V8 Exhaust Manifold Sierra replacement exhaust manifolds are designed to meet or exceed OEM requirements. This Sierra 18-1953-2 manifold is for Mercruiser GM Small Block...

Add to Cart