350 MPI Horizon Inboard – Down Angle MIE Engine Only NEW $17,399. (Plus-Series)

350 MPI Horizon Inboard – Down Angle MIE Engine Only Pt# 8M0187355  (2024-PY)
NEW (Plus-Series)

300 HP @ 4800 RPM 350 Cubic Inch Motor Fully Dressed Marine Engine.
Engine Features 100% New Quicksilver: Cast Iron Engine Block, Closed Cooled Engine Block & Exhaust
Manifolds, Flush System, Special Flame Graphics, Multi‑Port Fuel Injection using Cool fuel II,
Dry Joint Exhaust, Roller Camshaft, Quicksilver Cast Iron Cylinder Heads featuring Black‑X Valve Tech,
1.5:1 stamped steel rocker arms, ECM555, Engine Guardian, SmartCraft Ready,
Mechanical Throttle and Shift, Premium Dual‑Stage Driveplate, Inboard High‑Mount Starter, and
10‑Pin Harness. Runs on 87 Octane Fuel.
NOTE: Dealer must change driveplate if used with in‑line transmissions.
NOTE: Because this is a completely new engine and not a major repower assembly, the old engine being replaced is to be returned per EPA 1068.240.

300 HP 100% New Quicksilver Inboard EngineOnly by Quicksilver Products. 3-Year Mercury Marine Factory Warranty. ALL NEW ENGINE; no remanufactured parts.

NOTE:  California Installation in 2007 or earlier Model Year Boats ONLY & MUST return a Core Engine.
United States Installation in 2009 or earlier Model Year Boats ONLY & MUST return a Core Engine.

Replaces all makes of Standard (LH) Rotation small block 5.7L & 6.2L inboard
Any adaptation of this engine into a boat not using a MerCruiser engine may require minor changes
to the boat’s stringer and fuel system to accommodate this engine.
Do not modify this engine’s mounts nor fuel system to adapt into a boat.

NOTES: Payment by Wire Transfer, PayPal, Credit Card, Debit Card or Cash..

  1. Add 4% to Total Price if paid by PayPal.
  2. Add 4% To Total Price if Paid by Credit Card; must be in Store ONLY
  3. Shipping weight 1052#.
  4. Can be Shipped in Continental United States only.
  5. F.O.B. point of Origin San Dimas, California.
  6. Shipping is an additional charge. Call for Shipping Quote.

Payment and pickup of engine shall be PRO BOATS 555 Covina Blvd. San Dimas, CA., USA 91773

If you have any futher questions, please contact us at 909-599-0531.


Condition New
Manufacturer Quicksilver Products
Model Year 2024-PY
Model 350 MAG Horizon In-Line Down Angle Plus-Series Engine
MSRP $20,968.75
Price $17,399.00 USD
Color Black / Other
Stock Number PT# 8M0187355
Additional Pricing Information Can be Shipped in CONTINENTAL UNITED STATES