25 HP

4-Stroke Design

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

 

Increased Displacement For More Power

The BF25 has the largest displacement in its class, at 552 cc (33.7 cubic inches), providing more torque in midrange operation.

3 to 3 Induction

3 to 3 induction provides smooth, quiet operation, along with instant throttle response and performance. A compact 3-cylinder, 3-carburetor design utilizes one carburetor per cylinder. This design is more responsive than competitive throttle bodies with long intake runners.

 

PGM Ignition

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

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.

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.

Engine Alert System – Keeps you informed

Audio and visual cues combine with RPM reduction circuits to alert the operator of overheating, low oil PSI, and over-revving to prevent engine damage.

Forced Air Ventilation

A unique air intake on the top of the cowl allows cooler air to enter and warmer air to escape. The ventilation system reduces under-the-hood operating temperature, improving performance and long-term durability of the electrical components.

 

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.

True 5 Warranty

Honda’s True 5 Warranty is the best in the business. This transferable, non-declining warranty is the same on the first day as it is on the last.

Center Mount Tiller – Easier control

The ergonomically designed tiller handle is longer for improved handling. Adjustments for throttle and steering friction allow easier control. Up front shift lever, PTT switch, and engine alert lamps provide added convenience.

Regulated Charging System

A rectifier/regulator is standard on both manual and electric-start models. On manual models, you have the convenience of 4 Amps to charge the battery, and on electric-start models, a high-output 10 Amp system.

Gas Assist Tilt

Acting much like a pressure strut on a car’s trunk lid, the gas-filled cylinder makes it easy to tilt the engine for running in shallow water, or to raise it completely out of the water for protection.

Easy Maintenance

The port-mounted oil filter and oil fillers simplify maintenance. Easy “screw-type” valve adjusters require no shims, reducing maintenance costs.

Built-In Pitot Tube

A built-in pitot tube in the gear case eliminates the need to drill holes in your boat for installation.

 

 

Engine

Type 4-Stroke SOHC 3 Cylinder – 2 Valves/ Cyl.
Displacement 552 cc (33.7 cubic inches)
Bore & Stroke 61 mm x 63 mm (2.4 x 2.5 inches)
Full Throttle RPM Range 5,000-6,000 RPM
Rated Power 25 HP @ 5,500 RPM
Cooling System Water Cooled
Fuel Delivery 3 Carburetors
Ignition System PGM-IG
Starting System Electric
Exhaust Through Hub
Lubrication Wet Sump
Trim Range -4° to +12°
Tilt Range 64°

Drive

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

Equipment

Alternator with voltage regulator (Electric Start) 10-Amp (126 watt)
Propeller 3-Blade Aluminum
Diameter x Pitch 9¼ x 12 inches
Power Tilt NA
Power Trim & Tilt Available
Gas Assisted Tilt Available
Oil Pressure Alert Standard
Temperature Alert Standard
Rev-Limiter Standard

Dimensions

Overall Width 375 mm/14.8 inches

Dry Weight

S-Type 70.5 kg/155 lbs.
L-Type 72.5 kg/160 lbs.

Transom Height

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

Owner’s Manuals

Serial Number Size P/N
BAJL-1000001-1999999 Download Buy 2.65 MB 31ZV7610
BAJL-2000001-3000001 Download Buy 2.71 MB
BAJS-1000001-1999999 Download Buy 2.65 MB 31ZV7610
BAJS-2000001-3000001 Download Buy 2.71 MB
BAJS-3200001-3209999 Download Buy 2.7 MB 31ZV7613
BAJS-3210001-3219999 Download Buy 2.74 MB 31ZV7614
BAJS-3220001-3229999 Download Buy 1.84 MB 31ZV7615
BAJS-3300001-3399999 Download Buy 1.65 MB 31ZV7616
BAJU-1000001-1999999 Download Buy 2.65 MB 31ZV7610
BAJU-2000001-3000001 Download Buy 2.71 MB
BATJ-1000001-1999999 Download Buy 4.67 MB 31ZW2600
BATJ-1100001-1199999 Download Buy 6.14 MB 31ZW2602
BATJ-1200001-1299999 Download Buy 4.96 MB 31ZW2605
BATJ-1300001-1399999 Download Buy 5.15 MB 00X31ZW26200
BATJ-1400001-1499999 Download Buy 5.35 MB 00X31ZW26300
BATJ-1500001-9999999 Download Buy 5.32 MB 00X31ZW26310