Used 2017 Yamaha F90 JA 90 HP Jet Drive Outboard Motor

About this engine

There is a whole world of water that propeller boats simply cannot reach — rock-garden rivers, skinny tidal creeks, gravel bars that shift with every flood. The Yamaha F90 jet drive was built for exactly that water. With no propeller, no skeg and nothing hanging below the hull, a jet outboard draws inches instead of feet, and this 2017 F90 JA brings that capability with just 109 hours on the clock.

The platform is Yamaha's 1.8-liter inline-four: 1,832cc, SOHC 16-valve, electronic fuel injection, remote mechanical controls and a 35-amp alternator. Yamaha rates the jet pump output at 65 horsepower at the pump — the honest number that matters for a jet, since thrust on plane is what pushes a loaded river sled over shallow riffles. Owners in the jet-boat world value this engine for exactly that: dependable EFI starting, quiet four-stroke manners, and the freedom to run water that would cost a prop boat its lower unit.

Our gallery shows this engine rigged on a boat from the rear, front and side, plus a cowling-off powerhead view, so you can judge its condition for yourself. To be clear: this listing is for the engine only — the boat in the photographs is not included.

Jet ownership has its own logic, and this engine fits it well. There is no gearcase oil bath hanging in harm's way and no propeller budget — the wear items are the impeller, liner and intake grate, all inspectable from outside the boat. The EFI four-stroke underneath is a conventional Yamaha 1.8-liter, so routine service is familiar anywhere Yamaha is serviced; it is the jet pump on the bottom that turns a normal outboard into a river-running tool.

Buyers for this class of engine are usually river fishermen chasing steelhead and salmon water, duck hunters working flooded timber edges, and lodge or utility operators who need a boat that keeps moving where the chart says 'too shallow.' If your map has those places on it, a 109-hour factory jet at this price is the whole answer in one listing.

River runners, duck-boat builders and skinny-water anglers know how rarely a low-hour factory jet comes up — most are conversions or high-hour workhorses. A 109-hour 2017 at 22.5% below market is the one to move on. WhatsApp us for the fastest reply.

Good to know

Engine only — the gallery shows it rigged on a boat; the boat is not included.