Mercury-Mercruiser 8M0137121 LB 8.1HO-QS 01-UP

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Mercury-Mercruiser 8M0137121 LONG BLOCK ASSEMBLY has been superseded to a new part number.
The newest part number is 8M0187378 -click here- to see the newest superseded part
Please note the new superseded part is a functional replacement and may look different from the original part
Manufacturer part number: 8M0137121
GTIN: 745061036086
Manufacturer: Mercury Marine
Shipping specs, pounds and inches
$0.00

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. Also this service block canbe used with 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
1.7:1Rocker 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

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. Also this service block canbe used with 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
1.7:1Rocker 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

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