Mercury 90EXLPT FourStroke Outboard Motor

This used Mercury 90EXLPT FourStroke Outboard Motor runs 90 hp across four cylinders, with the Command Thrust (CT) gearcase fitted to a 25 inch extra-long shaft for added low-speed thrust.

What to check before buying

Throttle and shift linkage is mechanical and purchased separately from the powerhead; steering options include dual-cable mechanical, hydraulic power steering, or a tiller conversion. Shaft length is 25 inches on this unit, so measure your transom first.

Powerhead details

Dry weight comes in at 363 lbs for this 2.1 liter, four-cylinder EFI engine with a single overhead cam. Oil capacity is 5.5 quarts, the water-cooled alternator is rated 35 amps (441 watts), and the Command Thrust (CT) gearcase runs a 2.38:1 ratio with full throttle between 5000 and 5800 rpm. At 20 degrees shallow water trim, with trim topping 22 degrees and tilt reaching 70 degrees, this engine also carries a CARB star rating of 3. Lubrication is wet sump, and air induction runs through a performance-tuned scroll intake manifold.

What comes with it

Smart Start electric starting and SmartCraft Engine Guardian protection both come standard; a propeller is not included, so plan for that separately.

Common questions

Does Command Thrust change the shaft length? No, this listing's shaft is 25 inches regardless of gearcase.

What oil does Mercury recommend? NMMA certified FCW SAE 10W-30.