1988 Marine MerCruiser 5.7 L 350 260 HP Magnum

FOR SALE 1988 Marine MerCruiser 5.7 L 350 260 HP Magnum FRESH WATER 338 HRS. This engine very excellent condition with low HOURS.

The 1988 MerCruiser 5.7L (350 CID) Magnum is a marinized General Motors small-block V8 rated at 260 horsepower at 4,800 RPM. It was highly popular for its blend of low-end torque, reliability, and ease of maintenance, often paired with the Alpha One sterndrive.

Key Specifications
Specification Details

• Engine Type : 4-Stroke, V8
• Displacement : 350 CID (5.7 L)
• Horsepower : 260 HP @ 4800 RPM
• Bore & Stroke : 4.00″ X 3.48″ (101.6mm X 88.4mm)
• Compression Ratio : 9.4:1
• Fuel Requirement : 87 Octane
• Fuel System : 4-barrel carburetor (typically Weber or Rochester)
• Ignition System : Thunderbolt IV Ignition
• Engine Weight : ∼930–950 lbs depending on accessories
• Oil Capacity : 5.5 US quarts (5.2 L) with filter