Boat EnginesInboard Petrol EnginesMercury Mercruiser8.1 LITER 496 V-8 LONGBLOCK ASSEMBLY - 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 make is not recommended nor supported.
A complete repower with a quicksilver plus series engine is recommended for other makes.
Heavy Duty Iron Block with Splayed 4‑bolt Main Bearing Caps,
Priority Main Oiling System,
8.6:1 Hypereutectic Pistons,
1.7:1 rocker arms
Forged Steel Crankshaft,
billet oil adapter.
Quicksilver Iron cylinder heads feature black-valve techology, hardened seats, and shot peened marine valve springs
420 & 425 HP 100% New Quicksilver Marine Engine
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