8M0187378 Longblock 8.1 HO 2001-UP
This is a genuine Mercury Marine factory OEM part, not aftermarket
Please check our current stock level and order below. Use the Contact Us form at the bottom of the page for any questions
Availability: Not in stock - will be transferred from factory
Manufacturer part number: 8M0187378
GTIN: 678633153785
Normally Ships: Warehouse transfer - on 4th business day
Shipping specs, pounds and inches | | | |
MSRP: $21,550.00
$20,041.51
8M0178378 Quicksilver Value Series New Longblock. Superseded from part number 8M0137121
8 Cylinder 8.1 Liter, 496 High Output V‑8 (Left‑Hand Standard Rotation)
100% New Content - 3 Year limited warranty in the USA
Replaces 2001 & up 496 Mag H.O. & 8.1L H.O. MerCruiser, Mercury Remanufacturing, & Quicksilver High Output engines. Also this service block can be used with other makes of engines.
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
Parts that will need to be transferred or purchased separately
• Balancer
• Flywheel
• Spark Plugs
• Distributor
• Water pump
• Manifold gasket set
• Quicksilver Synthetic Blend 25W‑40 4‑Stroke Oil
