2017 Mercury 9.9 HP 9.9MXLH Outboard Motor

The 9.9MXLH takes the standard-gearcase 9.9 and stretches the shaft to 25 inches for taller transoms, while keeping the same pull-cord start, manual tilt, and standard propeller as the shorter-shaft versions sold in this family.

Extra-long shaft, not extra thrust

It's worth knowing this version does not carry Mercury's BigFoot or CommandThrust lower unit despite the longer shaft; it uses the same 2.08:1 standard gearcase and an aluminum propeller with three blades, pitched at 8.0 inches and spanning 8.5 inches, as the base 9.9. The longer shaft exists purely to reach a deeper-mounted transom, common on sailboats and some taller pontoons.

Simple to run and maintain

Pull-cord starting and a ratcheting manual tilt lever mean no battery and fewer parts, and one hand on the tiller covers steering, throttle, and shift for straightforward trolling or auxiliary use on a quiet afternoon out on the water.

Deciding if you need this over the shorter-shaft version

Measure your transom before choosing between this and the shorter-shaft 9.9MLH; the extra shaft length only helps if your mounting point actually sits that much higher off the water.

Common questions

Does this have the BigFoot or CommandThrust gearcase? No, it uses the standard gearcase and three-blade propeller.

What shaft length is this? 25 inches, extra-long.

Is it saltwater rated? Yes.

Specifications