Honda 140HP iST | BF140AXDA

Honda's BF140AXDA skips counter-rotation, pairing its 140 hp iST powerhead with a 25-inch shaft for boats that don't need a twin-engine, opposite-turning partner.

Shaft fit

This model uses a 25-inch shaft, so measure your transom before ordering rather than assuming it will fit without checking against the manufacturer's figure. The block here shares its 2354cc displacement and EFI fuel system with the rest of Honda's 140 hp iST range, and starting is handled electrically rather than by a pull cord, with no manual backup built in.

iST throttle

This motor's iST system runs shift and throttle electronically rather than through a mechanical cable, meaning the helm side of your rigging needs matching hardware instead of an off-the-shelf cable kit. This engine weighs 485 lbs, and Honda's spec sheet puts its full-throttle operating range at 5000 to 6000 rpm. Think of iST as a different control philosophy rather than an upgrade to the same mechanical linkage, so budget for the matching helm hardware when you order.

Common questions

Is this the counter-rotating version? No, this one turns in the standard direction; Honda sells a separate counter-rotating model for twin-engine setups.

What's standard equipment? A charging system, trim and tilt that's power operated, a fresh water flush fitting, and an owner's manual; a propeller is not included, and the warranty runs 5 years.