2015 Nissan 9.8 Hp NSF9.8A31 Outboard Motor

The Nissan NSF9.8A31 tops the 8 HP line by a notch at 9.8 HP, kept on a short, 15-inch shaft with tiller steering and a manual pull-start, suited to anyone who wants a bit more push without adding a battery.

What to check before buying

Match this short shaft to your transom height; Nissan builds this same 9.8 HP engine on a longer shaft for taller boats as well. The twin-cylinder block is carbureted, with SOHC valve gear and a thermostat holding cooling-water temperature steady, cleared for saltwater use. A front-mounted lever shifts the 2.08-to-1 gearbox, turning a 3-blade aluminum propeller, 8.5 inches in diameter and 8.0 inches of pitch.

Fuel, charging, and extras

A 3.1-gallon tank outside the motor handles fuel, joined by its own quick-connect hose. A charging alternator isn't included on this pull-start model but can be fitted as a separate kit. The box holds a printed manual and tool kit, with Nissan's 5-year warranty covering the engine. Anglers running a small jon boat tend to favor this horsepower step for the extra margin it gives over an 8 HP motor on a loaded boat.

Common questions

Does this model include electric start? No, it starts by pull cord; electric-start versions of this engine are sold separately.

Can an alternator be added afterward? Yes, as an optional kit installed on top of the base motor.

Specifications