Honda 20 HP Rope Start Long Shaft Outboard Marine Engine

The Honda BF 20 DK2 LHU is a 4-stroke outboard marine engine designed for small fiberglass, aluminum, or inflatable boats requiring a long shaft, between 2.5–4.5 meters, with a 20 HP / 14.7 kW and 350 cc 2-cylinder OHC Carbureted engine. The BF 20 DK2 LHU with its 350 cc 2-cylinder OHC engine offers smoother power delivery and less vibration compared to single-cylinder alternatives.

BF 20 DK2 LHU Engine Technology and Key Advantages

The 2-cylinder OHC design reduces vibration and balances power output with more frequent ignition intervals. With a portable weight of 49.5 KG, it provides 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 more frequent ignition intervals.
• Long Shaft (508 mm (20")): Perfectly fits small fiberglass transoms — the propeller operates at an optimal depth.
• F–N–R Gear System: Forward, neutral, and reverse — full control in tight spaces, dock, and marina maneuvers.
• Manual Start (Recoil): Battery and electric independent — mechanical reliability ready to operate in all conditions.
• Manual Trim: Manual adjustment of the transom angle — simple and reliable mechanical structure, independent of electrical operation.
• 12-Liter Internal Tank: Sufficient capacity for medium-distance routes; option for external tank connection on long journeys.

Long Shaft — What Boat Type Is It Suitable For?

The long shaft (508 mm (20")) is suitable for the 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: 4-stroke quiet operation for cruising without scaring fish
• Sailboat auxiliary engine: marina maneuvering and short transit power
• Spare engine: portable option as an additional safety solution for large boats

Maintenance and Long Life

4-stroke Honda engines run problem-free 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. Fresh water rinsing is mandatory after every use in saltwater.

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 on boats with a total weight between 200–400 kg.

How much better is a 2-cylinder OHC engine compared to single-cylinder alternatives?

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

How does the Manual (Recoil) start system work?

The manual recoil start does not require a battery or electrical system. It provides mechanical reliability ready to operate in all conditions.

Which boat and brand types is the BF 20 DK2 LHU compatible with?

Honda outboard motors are compatible with most 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 transom height of 508 mm (20") 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 2.5–30 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 together confirm the suitability of the Honda BF 20 DK2 LHU engine for your boat and the correct shaft selection.