20 HP

4-Stroke Design

World-renowned Honda quality combines proven reliability and superior fuel efficiency, with no oil mixing.

Available with Power Thrust Design (BFP) – better performance

The 10″ x 7 5/8″ Power Thrust 4-blade propeller creates 60% more thrust in reverse and 15% more in forward. The result? Improved maneuverability and performance.

Reverse Exhause Relief – increased manueverability (BFP models)

The exhaust relief feature creates more power in reverse by minimizing cavitation around the propeller blades. The exhaust relief is located above the cavitation plate, allowing the prop to run in clean, exhaust-free water.

 

Large Displacement

At 21.4 cubic inches, the 20hp has one of the largest displacements in its class. Along with the long-stroke design, this provides optimum torque throughout the RPM range.

Easy One Hand Starting

A built-in decompression release and digital CDI system set the BF20’s ignition timing. This reduces the effort required to pull-start the engine by hand by 40%!

Power Tilt

Conveniently allows user to tilt the unit out of the water. At low speeds, Power Tilt acts like a power shallow-water-drive device, permitting access to the shallow water areas.

Auto Start Enrichment – easy starts

Auto Start Enrichment acts as an automatic choke. Just like a fuel injection system, it automatically adjusts the air/fuel mixture for quick, easy starting and warm-up.

Pendulum Mount System

Honda’s exclusive triangulated rubber mount system absorbs vibration and provides unbelievably smooth operation.

 

EZ Steer Friction Control

A unique lever design allows you to precisely adjust steering tension for improved control and comfort.

3 Stage Carburetion

Conventional 2-circuit carburetors go directly from a lean mixture at idle to a rich setting at full throttle. The BF20 adds a third stage for better economy and smoother operation.

PGM Ignition

A reliable microprocessor accurately controls ignition timing during start-up and across the entire RPM range, providing optimum overall operation.

Shallow Water Drive

An innovative shallow water drive feature lets you tilt the motor up, allowing you to easily operate in shallow areas. Shallow water drive greatly reduces the risk of engine damage.

Engine Alert System – Keeps you informed

The integrated warning system protects the engine from severe damage due to low oil, over-revving and overheating.

4-Front Corrosion Protection System – Fights the elements

A patented, “Double Sealed” multi-layered paint process. Sacrificial anodes and stainless steel technology, along with waterproof connectors, all enhance corrosion protection.

 

Positive Lubrication

A crankshaft-driven, automotive-style trochoid oil pump ensures long-term durability of critical engine components.

Ultra Low 3 Star CARB Emissions

Environmentally conscious technology. All Honda Marine engines exceed the highest CARB 3-Star rating to meet the rigorous California Air Resource Board’s standards.

High Output Charging

The BF20 provides 2 Amps at 1000 RPM and an amazing 12 amps at only 3000 RPM. This helps to maintain the battery charge or keep electronics going – even at trolling speeds.

Integrated Carrying Handle

The integrated carrying handle make transporting the engine a breeze. A convenient, foldaway carry handle is situated at the exact top/bottom balance point of the engine. This means the engine carries more easily in a level position.

Longer Tiller Handle

A convenient longer tiller handle improves control and reduced steering effort. The extended handle is made of a lightweight composite, increasing its durability while decreasing the motor’s weight.

Up Front Tiller Controls

A convenient front-mounted shift lever allows fingertip shifting. The Twist Grip Throttle & Tensioner minimize driver fatigue.

 

 

 

Engine

Type 4-Stroke SOHC 2 Cylinder/4 Valves
Displacement 350 cc (21.5 cubic inches)
Bore & Stroke 59 mm x 64 mm (2.3 x 2.5 inches)
Full Throttle RPM Range 5,000-6,000 RPM
Rated Power 20 HP @ 5,500 RPM
Cooling System Water Cooled
Fuel Delivery 1 Carburetor
Ignition System PGM-IG
Starting System Electric/Recoil
Exhaust Through Hub
Lubrication Wet Sump
Trim Range 4 Stage 8°-12°-16°-20°
Tilt Range 72°

Drive

Gear Ratio 2.08:1
Gear Shift F-N-R

Equipment

Alternator with voltage regulator (Electric Start) 12-Amp (151 watt)
Alternator with voltage regulator (Manual Start) 6-Amp (76 watt)
Propeller 4-Blade Aluminum
Diameter x Pitch, Standard 9¼ x 10 inches
Diameter x Pitch, Power Thrust 10 x 7⅝ inches
Power Tilt Available
Oil Pressure Alert Standard
Temperature Alert Standard
Rev-Limiter Standard

Dimensions

Overall Width 350 mm/13.8 inches

Dry Weight

S-Type 47 kg/104 lbs.
L-Type 50 kg/110 lbs.

Transom Height

S Type 381 mm/15 inches
L Type 508 mm/20 inches

Owner’s Manuals

Serial Number Size P/N
BAMJ-1000001-1099999 Download Buy 4.32 MB 31ZY0600
BAMJ-1100001-1199999 Download Buy 5 MB 31ZY0603
BAMJ-1200001-1299999 Download Buy 5.17 MB 31ZY0604
BAMJ-1300001-1399999 Download Buy 5.25 MB 31ZY0608
BAMJ-1400001-1499999 Download Buy 5.46 MB 00X31ZY06200
BAMJ-1500001-1599999 Download Buy 9.32 MB 00X31ZY06300
BAMJ-1600001-9999999 Download Buy 5.55 MB 00X31ZY06310