FOR SALE 1987 Mercury Marine MerCruiser 5.7 L 350 260 HP Inboard Boat Engine motor CW. Very excellent condition with clean engine and runs great.

The 1987 MerCruiser 5.7L 260 HP is a legendary GM small-block 350 cid V8 marinized by Mercury Marine. Known for its incredible durability and smooth idle.

Core Specifications

• Engine Type : Chevrolet 350 cubic-inch (5.7L) V8
• Horsepower : 260 HP @ 4800 RPM
• Fuel Delivery : 4-barrel carburetor
• Ignition : Thunderbolt Ignition system
• Cooling System : Raw-water cooled (standard)

Identification & Compatibility

• Rear Main Seal : 1987 is a transition year for the GM 350. Many 1987 models feature a one-piece rear main seal and center-bolt cylinder heads, making it different from earlier 1970s/early 1980s two-piece seal blocks.
• Rotation : Typically standard (left-hand) rotation for single-engine applications, though reverse (right-hand) rotation was used in twin-engine setups.