Yamaha 115HP | LF115XB

A counter-rotating lower unit sets the Yamaha LF115XB apart from a standard F115, bolted to the same 1.8-liter four-stroke inline-four, on a 25-inch shaft with remote mechanical throttle and shift, electric start, and 386 lbs on the scale. That rotation makes it the matching half of a twin-engine pair rather than a standalone model meant to run on its own.

Why counter rotation

Running counter rotation on one side of a twin install is meant to balance out steering pull rather than fighting it with two identical standard-rotation engines side by side; this is the design purpose of the LF115XB specifically, paired with a standard-rotation F115 on the other side of the transom.

Included equipment

Power trim and tilt come standard here, alongside the counter-rotation lower unit itself and an owner's manual; sourcing a propeller is left to the buyer, same as elsewhere in Yamaha's F115 range, since the right prop depends on the boat it ends up on.

Pairing and fit

Plan to order this alongside its standard-rotation counterpart for a twin install, and check the 25-inch shaft against your transom before either engine ships, since both sides of the pair need matching shaft lengths to rig correctly.

Specs at a glance: 1832cc of displacement, a full-throttle band of 5300 to 6300 rpm, and 3 years of warranty coverage.