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

Picture of Mercury-Mercruiser 8M0187366 Longblock 5.7L 350 V-8 05-15 Bar codes for Mercury Marine part number 8M0187366
8M0187366 Longblock 5.7L 2005-15
This is a genuine Mercury Marine Quicksilver 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: 1 in stock
Manufacturer part number: 8M0187366
GTIN: 678633153716
Normally Ships: Available - Next business day
Manufacturer: Mercury Marine
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MSRP: $9,475.00
$8,944.41

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

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

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