BF 20 LHSU Outboard Motor / Long Shaft / Electric Start

Honda BF 20 LHSU Outboard Motor: Long Shaft Power for Sailboats, Pontoons & Deep-V Hulls

Some boats just need more transom clearance and more low-end grunt than a standard 20HP can offer. The BF 20 LHSU Outboard Motor was built exactly for that gap. Sailboat owners repowering an auxiliary, pontoon captains dealing with a tall 20-inch transom, anglers running a heavy aluminum deep-V. This engine handles all of it without breaking a sweat.

The Biggest Block in Its Class

Honda didn’t shrink anything to hit the 20HP mark here. The BF20 runs a 350cc, 21.5 cubic inch four-stroke OHC twin cylinder block, the largest displacement of any engine in the 20HP category. More cubic inches at this horsepower rating means more low-end torque, and torque is what actually gets a loaded pontoon or a heavy sailboat moving off idle. Small block competitors rev harder to make the same numbers on paper. This one just pulls.

Programmed Ignition, or PGM-IG, manages spark timing and air-fuel mapping continuously as conditions change. Cold start on a fall morning. Humid, thick air in July. The ECU adjusts instantly, so starts stay consistent and throttle response stays crisp no matter the season.

Vibration Control You Can Actually Feel

A pendulum-mounted engine cowl isolates the powerhead from the mounting bracket, absorbing the harsh twin-cylinder vibration before it ever reaches your hand on the tiller. Long days trolling. Long runs across open water. Your grip stays relaxed instead of numb.

Electric Start, Serious Charging Output

Pull cords are fine until your hands are full or the water’s rough. The BF 20 LHSU Outboard Motor Electric Start system solves that with a push of a button, backed by a recoil starter if you ever need a manual fallback. Paired with it is a 12-amp alternator, genuinely high output for this class, more than enough to keep a battery topped off while running chartplotters, fish finders, and running lights simultaneously. Nobody wants to limp home on a dead house battery. This engine makes sure that doesn’t happen.

Built for 20-Inch Transoms

Fitment matters more than most buyers realize, and getting it wrong means cavitation, poor steering, or a motor that simply won’t mount correctly. The BF 20 LHSU Outboard Motor Long Shaft configuration is engineered precisely for a 20-inch transom height, the standard on many sailboats, pontoons, and deeper-hulled aluminum boats where a standard shaft would leave the prop dangerously shallow. Steering comes through a lengthened composite tiller handle, lightweight enough to swing all day but stiff enough to translate real, responsive input straight to the lower unit.

Weight That Doesn’t Match the Displacement

Given the size of that 350cc block, the weight here is almost surprising. Around 114 lbs, or 52 kg. That’s genuinely portable for a long-shaft 20HP with this much displacement, easing everything from dealer transport to dinghy transfers to storage swaps at the end of the season. Big engine. Manageable weight. Not a common combination.

Secure Yours Before It’s Gone

Long shaft, high-displacement 20HP outboards move fast, and inventory on a BF 20 LHSU Outboard Motor doesn’t sit around for long at Marine Gear Depot. If your transom needs the extra reach and your boat needs real torque down low, this is the engine built for exactly that job. Click Add to Cart now and lock in your BF20 LHSU before this batch is gone.