Honda 20 HP Steering Electric Start Long Shaft Outboard Motor

The Honda BF 20 DK2 LRU is a 4-stroke outboard marine engine designed for small fiberglass, aluminum, or inflatable boats (2.5–4.5 meters) that require a long shaft. It features a 20 HP / 14.7 kW, 350 cc, 2-cylinder OHC carbureted engine. With its 350 cc, 2-cylinder OHC engine, the BF 20 DK2 LRU offers smoother power delivery and less vibration compared to single-cylinder alternatives.

BF 20 DK2 LRU Engine Technology and Key Advantages

The 2-cylinder OHC structure reduces vibration and balances power output with a more frequent firing interval. With a portable weight of 51 KG, it achieves a balanced power-to-weight ratio in this power class.

• 2-Cylinder OHC Carbureted Engine (350 cc, 2 Cylinders): The 2-cylinder OHC structure reduces vibration and balances power output with a more frequent firing interval.
• Long Shaft (508 mm (20")): Perfect fit for small fiberglass transom heights — propeller operates at optimal depth.
• F–N–R Gear System: Forward, neutral, and reverse — full control for maneuvering in tight spaces, docks, and marinas.
• Electric Start: Instant activation with a key or button — comfortable and quick starting.
• Manual Trim: Manual adjustment of transom angle — simple and reliable mechanical structure, independent of electricity.
• 12-Liter Internal Tank: Sufficient capacity for medium-distance routes; option for external tank connection for longer voyages.

Long Shaft — What Type of Boat 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 2.5–4.5 meter inflatable boats and small boats: 2-cylinder balanced power and low vibration
• Fishing and lake use: Quiet 4-stroke operation for smooth navigation without scaring fish
• Sailboat auxiliary engine: Power for marina maneuvers and short passages
• Backup engine: Portable option as an additional safety solution for large boats

Maintenance and Longevity

Honda 4-stroke engines operate 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 each use.

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

Frequently Asked Questions

What boat size is the Honda 20 HP engine suitable for?

20 HP power is an optimized range for 2.5–4.5 meter inflatable boats and small aluminum boats. The most efficient performance is achieved in boats with a total weight between 200–400 kg.

How does a 2-cylinder OHC engine compare to single-cylinder alternatives?

Two cylinders produce less vibration and smoother power output due to a more frequent firing interval. This difference is noticeable, especially at full throttle and against the wind. The 4-stroke design, which does not require an oil-gasoline mixture, ensures low maintenance costs.

How does the electric start system work?

The electric start engages the engine instantly with a turn of the key. It requires a battery connection.

Which boat and brand models are compatible with the BF 20 DK2 LRU?

Honda outboard motors are compatible with the vast majority of Zodiac, Ribeye, Highfield, Bombard, Sea Eagle, and domestic 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 Motors
• Honda Marine Products
• Honda Marine Spare Parts
• 4-Stroke 2.5–30 HP Engines
• Outboard Motors
• 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 verify together if the Honda BF 20 DK2 LRU engine is suitable for your boat and confirm the correct shaft selection.