(replaces years 1991-newer)

This is a completely remanufactured 7.4L/454 c.i. Gen VI Marine Base Engine. This engine will replace 7.4L marine engines used in Mercruiser, Volvo Penta, OMC, Crusader, Indmar and other inboard marine applications between the years 1991-present which utilize the "oval" shaped intake port cylinder heads. These remanufactured marine engines are carefully remanufactured to exact OEM specifications and bored, decked, and blueprinted on a CNC machine making these units some of the best in the industry.

This Base Engine Package includes:

  •  remanufactured engine block, heads & crankshaft

  • ALL NEW internal components

  • valve covers

  • timing cover

  • oil pan

  • harmonic balancer


  • 1 Piece Rear Main Seal

  • Standard rotation

  • Cylinders: 90 Degree V8 Cylinder (oval port)

  • Hydraulic Roller Camshaft

  • Compression Ratio: 8.75:1

  • Bore: .030 over

  • Firing Order: 1-8-4-3-6-5-7-2

  • Oil Pan Capacity: 8 quarts

  • Oil Type: SAE 10W40 

  • Horsepower: 340 hp @ 4400 RPM

  • Torque: 435 lb-ft @ 3200 RPM

Call or Text Today To Speak With Our Engine Specialists!

(833) RE-MOTOR that's (833) 736-6867

HOURS: Mon-Fri 8:30am - 4:30pm CST
Closed Sat, Sun & Holidays

Tel: (833) 736-6867    Email:

TCM Engine Supply is a certified DBA of Topcat Industries, LLC.