Honda 40 HP Steering Electric Start Power Trim Long Shaft Outboard Motor

The Honda BF 40 DK4 LRTZ is a 4-stroke outboard marine engine designed for small and medium-sized fiberglass or aluminum boats, and 3.5–6 meter inflatable boats that require a long shaft, featuring a 40 HP / 29.4 kW and 808 cc 3-cylinder OHC PGM-FI engine. The BF 40 DK4 LRTZ, with its 808 cc 3-cylinder OHC engine, offers a reliable and economical power source to users of small and medium-sized boats.

BF 40 DK4 LRTZ Engine Technology and Key Advantages

PGM-FI electronic injection ensures easy cold starts and consistent power output. Maintenance requirements are lower compared to carbureted alternatives. A 25-liter built-in tank provides comfort for medium-distance routes.

• 3-Cylinder OHC PGM-FI Engine (808 cc, 3-Cylinder): PGM-FI electronic injection ensures easy cold starts and consistent power output.
• Long Shaft (508 mm (20")): perfect fit for small and medium-sized fiberglass or aluminum boat transom heights — propeller operates at optimal depth.
• F–N–R Gear System: Forward, neutral, and reverse — full control in tight spaces, dock, and marina maneuvers.
• Electric Start: Instant activation with a key or button — comfortable and fast starting.
• Electric Trim and Tilt: Adjust trim angle with a button — fuel efficiency and speed optimization during cruising; possibility to fully raise the engine with tilt.
• 25-Liter Built-in Tank: Sufficient capacity for medium-distance routes; external tank connection option for long voyages.

Long Shaft — What Boat Type Is It Suitable For?

The long shaft (508 mm (20")) is suitable for the vast majority of inflatable boats, aluminum fishing boats, and small fiberglass boat models. For boats with a transom height of 381 mm, a short shaft model should be preferred.

Technical Specifications

Who Is This Engine For?

• Primary engine for 3.5–6 meter small and medium-sized boats: reliable 3-cylinder power.
• Fishing and coastal cruising: quiet 4-stroke operation and low fuel consumption.
• Inflatable boats and RIBs: strong thrust within performance limits.
• Family boats and weekend use: durable and economical power source.

Maintenance and Longevity

4-stroke Honda engines run smoothly for many years with regular oil changes and end-of-season maintenance protocols. The impeller of the water-cooled system should be checked every 100 hours or every two seasons. In saltwater use, freshwater flushing is mandatory after every use.

Related maintenance categories: Maintenance Kit | Engine Oil | Impeller | Honda Marine Spare Parts

Frequently Asked Questions

What speed can be achieved with a Honda 40 HP engine?

40 HP power varies depending on boat size and load. On a 4-meter inflatable boat with a moderate load, a speed of approximately 25–35 knots can be expected. Actual speed is directly related to boat type, propeller pitch, and load capacity.

What advantage does the PGM-FI system provide in this power class?

PGM-FI electronic injection offers easy cold starts and consistent power output. Maintenance requirements are lower compared to carbureted engines.

Is a 25-liter built-in tank sufficient for daily use?

At 40 HP power, consumption of approximately 7.2–8.8 L/hour is expected at mid-range RPMs. A 25 L tank provides a cruising range of 3–5 hours. An external tank connection is recommended for long routes.

Which boat and inflatable boat brands are compatible with the BF 40 DK4 LRTZ?

Honda outboard motors are compatible with the vast majority of Zodiac, Ribeye, Highfield, Bombard, Sea Eagle, and local brand inflatable boats thanks to their universal transom clamp system. The only criteria are your boat's 508 mm (20") transom height and the maximum engine power approved by the manufacturer. You can get compatibility confirmation from Clever Marin by sharing your boat model.

Related Products and Categories

• Honda Marine Outboard Engines
• Honda Marine Products
• Honda Marine Spare Parts
• 4-Stroke 40–60 HP Engines
• Outboard Engines
• Boat Engines
• Maintenance Kit
• Impeller
• Engine Oil
• Anode

Is This the Right Configuration for Your Boat?

Share your boat model, transom height, and intended use — let's confirm the suitability of the Honda BF 40 DK4 LRTZ engine for your boat and the correct shaft selection together.