Mercury 90EXLPT Command Thrust FourStroke

At 90 hp with four cylinders, this used Mercury 90EXLPT Command Thrust FourStroke runs a 25 inch extra-long shaft and the Command Thrust gearcase, aimed at keeping a heavier boat on plane at low speed.

What to check before buying

This EXLPT needs its own mechanical throttle and shift hardware, sold apart from the engine, and steering can be dual-cable mechanical, hydraulic power steering, or an advanced tiller conversion. Measure your transom for the 25 inch shaft before ordering.

Specifications worth knowing

Expect a dry weight of 363 lbs on this four-cylinder, EFI-fed 2.1 liter block, with a single overhead cam and a 2.38:1 ratio through the Command Thrust gearcase. Full throttle falls between 5000 and 5800 rpm, oil capacity is 5.5 quarts, and the alternator delivers 35 amps (441 watts), water-cooled. Shallow water trim tops out at 20 degrees, trim range runs to 22 degrees, and tilt range reaches 70 degrees. Lubrication runs through a wet sump, and ignition is handled by a SmartCraft ECM 70 digital inductive system.

What comes with it

SmartCraft Engine Guardian monitors engine health, and starting is Smart Start electric. A propeller is not included, so budget for one that fits your boat.

Common questions

What shaft length does this unit use? 25 inches, the extra-long option.

Is a propeller part of the package? No, it ships without one.