2018 Yamaha F115 I-4 1.8L Mechanical 25 F115XB Outboard Motor

This F115XB runs the same 115 hp, 1.8-liter four-stroke with double overhead camshafts as its shorter-shaft sibling, mounted on a 25-inch shaft instead; steering is remote mechanical, starting is electric, and dry weight comes in at 386 lbs on this listing. Yamaha's figures for the platform claim a roughly 25-lb weight edge over rival DOHC 115s and a zero-to-200-foot run 0.7 seconds quicker than the model it replaced.

Reliability touches worth knowing

A freshwater flush fitting rinses the engine between outings without running it, stainless drive, prop and shift-shaft hardware adds a layer of corrosion resistance beyond the paint finish, and the warning system automatically pulls rpm back if oil pressure drops or the engine overheats. Updated cowling is aimed at cutting intake noise and improving water separation at speed.

At 386 lbs on a 25-inch shaft, check your transom rating and hoist capacity before ordering, and confirm your boat already has the helm cables a remote-steer build needs rather than tiller hardware.

Break-in on a new double-overhead-camshaft engine like this one is worth following closely for the first several hours on the water, since varying the rpm rather than holding one steady speed helps rings and bearings seat properly before sustained high-throttle running.

Questions buyers ask

What's the alternator output? 35 amps.

What's the bore and stroke? 81 x 88.9mm.

What warranty applies? A 3-year limited pleasure and 1-year limited commercial warranty, per Yamaha's listed terms.