Mercury-Mercruiser 8M0187366 Longblock 5.7L 350 V-8 05-15

8M0187366 Quicksilver Value Series Longblock

8 Cylinder, 5.7 Liter, 350 V‑8
(Left‑Hand Standard Rotation) 100% New Content
Replaces all makes of 2005‑2015 5.7L Gen+ marine engines using an 8‑bolt intake manifold with high torque marine camshaft for 4800‑5200 RPM range.
Does not include provisions for a mechanical fuel pump.
Engine features: Cast iron block, nodular iron crankshaft, single‑piece rear main seal, roller camshaft, marine oil pan, high flow oil pump, harmonic balancer and CPS included. Quicksilver cast iron cylinder heads include: hardened seats, screw in studs, & Black‑X valves.

300 HP 100% New Quicksilver Marine Engine
Applications include:
2005‑2015 MCM/MIE 350 Mag & 5.7L MPI engines (SN 0W310000 & up)
Quicksilver 350 MPI Alpha, Bravo, Inboard, & Tow
Volvo 5.7Gi‑300‑J EFI model

Quicksilver Value Series longblocks are built from scratch for Marine applications, and some are compatible for Industrial duty! 100% new Quicksilver Value Series longblocks are not  remanufactured nor converted automobile units. 

3‑Years of Limited Warranty in the USA

Improvements to the original products include:

Black‑X Valve Technology
• 21N Intake valve parent material
• 24N Exhaust valve parent material
• Plasma nitride prevents valve sticking & increases toughness
• Chrome‑Cobalt alloy seats resist corrosion from alcohol fuels
• Valve life improved 42%
Hardened valve seat installed in the cylinder heads
• Hardened Intake & Exhaust seat inserts
• Premium alloy seat material
Heavy duty head and block castings
• Resist corrosion and cracking
• Higher loading capacity
• Ability to use solid engine mounts
Premium components
• 100% brass core plugs
• High volume oil pump
• Marine valve springs resist fatigue
• Super polished crankshafts using superior material and design features
100% Advanced SIM Testing
• Water and oil passages pressure tested 100%
• Phased rotational testing with hot oil validates all oil passages, bearings, and assembly
• Advanced compression testing verifies cylinder sealing and valve lash integrity
• Oil flush at completion of test removes break‑in debris
• Shipped without oil to prevent spillage while in transit

No core & no container deposits

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