2017 Mercury 9.9 HP 9.9EXLH-CT Outboard Motor

This 2017-built 9.9EXLH-CT combines a 25-inch extra-long shaft, electric start, and Mercury's CommandThrust gearcase for boats whose transoms sit above the standard mounting line, not for a typical low-transom hull you'd see on a small jon boat.

Why shaft length is the first spec to check

Buying by horsepower alone is a common mistake with outboards this size; shaft length is what determines whether the propeller sits at the right depth. The extra-long 25-inch shaft here is meant for taller transoms, so measure first rather than assuming fit from the boat category or brand name.

What CommandThrust adds

With a 2.42:1 ratio, the larger four-blade prop favors thrust over velocity, trading some top speed for the low-speed pushing power that heavier hulls need when getting up to plane or holding position against current and wind.

Operating it

Throttle and shift sit on the tiller alongside steering, typical for a kicker or auxiliary role rather than a primary high-speed motor meant to cover distance quickly. Tilt here is manual and ratcheting rather than power-operated, keeping the setup simpler and lighter overall, with fewer parts that can fail out on the water far from a dock.

Common questions

Does it have power tilt? No, tilt is manual and ratcheting on this model.

Is it rated for saltwater? Yes.

What propeller ships with it? A CommandThrust four-blade aluminum propeller.

Specifications