Page 77 - Mercury Repower Guide

PRO-SERIES LONGBLOCK ASSEMBLY

7.4 LITER V-8 LONGBLOCK ASSEMBLY

LONGBLOCK ASSEMBLY

883281R50
Remanufactured PRO Series Longblock
GM 7.4 Liter MPI V/8 L‑29 Block
(Left‑Hand Standard Rotation)
Replaces 1998 and newer GM 7.4L MPI L‑29 Standard sterndrive and inboard
marine engines with oval ports and roller‑lifters.
8.1 LITER 496 V-8 LONGBLOCK ASSEMBLY
MERCRUISER LONGBLOCK ASSEMBLY

8M0137122
Quicksilver Value Series Longblock
8 Cylinder 8.1 Liter, 496 V‑8
(Left‑Hand Standard Rotation) 100% New Content
Replaces 2001 & up 496 Mag & 8.1L Horizon MerCruiser, Mercury
Remanufacturing, & Quicksilver base engines. Use of this service block for other
makes is not recommended, nor supported. A complete repower with a Quicksilver
Plus Series engine is recommended for other makes.
Engine Features: Heavy Duty Iron Block with Splayed 4‑bolt Main Bearing Caps,
Priority Main Oiling System, 8.6:1 Hypereutectic Pistons, Roller Camshaft, 1.7:1
Rocker Arms, Forged Steel Crankshaft, and billet oil adapter. Quicksilver Iron
Cylinder Heads feature Black‑X Valve Technology, hardened seats, and shot
peened marine valve springs.
370 & 375 HP 100% New Quicksilver Marine Engine
8M0137121
Quicksilver Value Series Longblock
8 Cylinder 8.1 Liter, 496 High Output V‑8
(Left‑Hand Standard Rotation) 100% New Content
Replaces 2001 & up 496 Mag H.O. & 8.1L H.O. MerCruiser, Mercury
Remanufacturing, & Quicksilver High Output engines. Use of this service block for
other makes is not recommended, nor supported. A complete repower with a
Quicksilver Plus Series engine is recommended for other makes.
Engine Features: Heavy Duty Iron Block with Splayed 4‑bolt Main Bearing Caps,
Priority Main Oiling System, 8.6:1 Hypereutectic Pistons, Roller Camshaft, 1.7:1
Rocker Arms, Forged Steel Crankshaft, and billet oil adapter. Quicksilver Iron
Cylinder Heads feature Black‑X Valve Technology, hardened seats, and shot
peened marine valve springs.
420 & 425 HP 100% New Quicksilver Marine Engine

64 P/N 8M0150768