New engine MERCRUISER 5.7L 350MPI 300HP Alpha
$18,500.00
New engine MERCRUISER 5.7L 350MPI 300HP Alpha
MERCRUISER 5.7L 350 MPI Alpha 300HP Full Engine
Delivered without plate and without gearcase.
Get the V8 injection engine you’ve always dreamed of for your Z-drive boat.
It is the perfect engine to replace any 5.0 L, 5.7 L and 350 carburetor and injection engine.
This engine offers cast iron durability with exclusive Black-X valve technology and is compatible with SmartCraft digital gauges.
Specifications: dressed marine engine. Engine features: Special flame graphics, new 600 cu. in. carburetor, electric fuel pump, 2-piece wet-seal exhaust, nodular iron crankshaft, billet steel roller camshaft, Vortec cast iron heads, stainless steel valves, hypereutectic 9.4:1 pistons, 1.5:1 roller rockers, 55 ECM ignition with knock control, 10-pin harness. 1, 1.5:1 roller rockers, ECM 55 ignition with knock control, 10-pin harness. Runs on 87 octane fuel.
Main characteristics:
- HP / kW @ flywheel 300 / 224
- Maximum RPM (WOT) 4800 – 5200
- Engine type V-8 Remanufactured Iron Marine Block
- Displacement (CID/L) 355 / 5.8
- Bore and stroke 4.03 x 3.48″ / 102 x 88 mm
- Compression ratio 9.4:1
- Fuel ethanol tolerance Up to 10%
- Engine fuel system MPI
- Air induction Dual plane iron intake manifold
- Alternator (amp/Watt) 65 amp / 917 Watt
- Water drain system Multi-point drain
- Exhaust system Electro-deposition paint coated warm iron manifold with wet joint elbow
- Cooling system 160F Raw Water
- Accessory drive system Serpentine belt
- Lubrication system High Flow 60 psi Oil Pump
- Recommended oil Mercury MerCruiser Synthetic Blend 25W-40, NMMA Certified FC-W Synthetic Blend
- Hypereutectic alloy cast pistons
- Cranktrain Powder Metal Rods and Nodular Iron Crankshaft
- Rocker arms 1.5:1 Full Roller Steel
- Dimensions (L x W x H) 32 x 30 x 22″ / 814 x 740 x 559 mm
- Weight (engine only) 932 lbs / 423 kg
Compatible with Alpha One Gen 2 gearcases with a ratio of 1.47:1 and 1.81:1
If this engine is fitted with an Alpha One Gen 1 gearcase, it requires the water pump kit 8M0139983 with belt 865615Q03, both sold separately.
We know an outboard engine isn’t just another package—it’s a serious piece of equipment. That’s why we’ve built a shipping process that’s safe, reliable, and transparent from checkout to delivery.
📦 Order Processing
Orders are typically processed within 1–3 business days after payment confirmation.
Once your order ships, you’ll receive a tracking number so you can follow your engine every step of the way.
🚚 Shipping Methods
All outboard engines are shipped via trusted freight carriers experienced in handling heavy marine equipment.
Engines are professionally crated or securely palletized to ensure maximum protection during transit.
⏱ Estimated Delivery Times
Domestic Shipping: 5–10 business days after dispatch
International Shipping: Delivery times vary by destination and customs clearance
Please note that delivery times are estimates and may be affected by weather, carrier delays, or remote delivery locations.
📍 Delivery Details
Freight shipments are typically delivered curbside or to a commercial dock.
The carrier may contact you in advance to schedule delivery—please ensure someone is available to receive and inspect the shipment.
🔍 Inspection Upon Arrival
We strongly recommend inspecting the crate or packaging before signing for delivery.
If you notice visible damage, note it on the delivery receipt and contact us immediately.
Any concealed damage should be reported within 48 hours of delivery.
🌍 International Orders & Customs
International customers are responsible for customs duties, taxes, and import fees, which are not included in the purchase price.
We provide all necessary documentation to help your shipment clear customs smoothly.
❓ Questions or Special Requests?
If you need expedited shipping, have access restrictions, or want a custom shipping quote, our support team is happy to help.
📩 Contact us anytime—we’re here to make sure your engine arrives safely and ready for the water.
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