Long Shaft Outboard Motor

Long Shaft Outboard Motor is a dependable marine power source for boats with deeper transoms. It has a longer shaft, around 56 cm, which lets the propeller go deeper. This makes it perfect for boats with high stern ramps. Long-shaft outboard motors keep things moving smoothly and steadily, even in choppy waters.

KLS Supplier makes outboard motors that are high-quality, long-lasting, resistant to salt spray, and resistant to wear. Long-shaft outboard motors with horsepower ratings of 9.9hp, 15hp, 25hp, 40hp, and 60hp are some of the most popular. Long leg outboard motors have longer shafts that let the propeller go deeper into the water. This cuts down on cavitation and makes propulsion more efficient.

The long shaft outboard motor is a type of propulsion system that is specifically designed for deep-draft boats. It is an enlarged version of the normal outboard motor. The lengthy drive shaft, which is usually 20 inches or longer, is what makes it stand out. This lets the propeller work stably at deeper depths, which greatly improves propulsion efficiency and handling stability. The unit's performance benefits come from an optimized power transmission path and a deeper underwater thrust position, which effectively reduces ventilation and cavitation. This means that the unit can keep producing power smoothly and continuously, even when the seas are rough, the currents are complex, or the loads are heavy. Also, the long-shaft design is perfect for high-freeboard boats, deep-V hulls, or commercial workboats, which makes navigation safer and more compatible overall. These outboard motors are built with strong, corrosion-resistant materials and multi-layer protective coatings to let them last longer in saltwater and high-humidity settings. When in use and when not in use, it is very important to make sure that the installation height is correct, which means that the shaft length and the transom height should match. It is also important to take steps to protect against salt spray, prevent corrosion, and do regular maintenance to make sure that the equipment works well and stays stable for a long time.

1. Better Stability For Underwater Propulsion:

Long-shaft outboard motors have an extended drive shaft that keeps the propeller working in a deeper, more stable layer of water. This reduces problems with ventilation and cavitation. These motors keep a steady and smooth propulsion output even when there are strong winds, complicated currents, or fast navigation. This greatly improves the overall stability of the navigation and the operator's confidence.

2. More Compatible With Other Vessels:

This kind of outboard motor is made just for boats with large freeboards, deep-V hulls, and commercial workboats. They help match the power of fishing boats, patrol boats, and cargo ships to their hulls better. The long-shaft configuration is more adaptable and useful in tough operational settings than the short-shaft variants.

3. Different Power Options: 2-Stroke And 4-Stroke:

You may get long-shaft outboard motors with either two or four strokes. The 2-stroke models are great for people who want things to happen quickly because they are simple in design, accelerate quickly, and are easy to maintain. On the other hand, the 4-stroke machines are better for high-end applications and long operational periods because they use less fuel, make less noise, and have emissions that are better for the environment. This dual option gives users the freedom to choose the power solution that works best for them.

4. Improved Efficiency Of Power Transmission:

The design of the shaft length and propeller positioning is such that engine power is sent to the underwater propeller more efficiently, which reduces energy loss. This not only makes the propulsion system more efficient, but it also saves gasoline, especially when the ship is fully loaded or on extended trips.

5. Structural Design That Lasts And Works:

The whole unit is made of strong alloys and has various anti-corrosion coatings. This makes it very resistant to salt spray and corrosion, so it can handle severe situations like seawater and high humidity. Also, the motor's proven structural design makes sure it stays stable and reliable, even when it has to work under heavy loads for a long time.

6. Improved Safety On The Job: 
The long-shaft design moves the propeller away from the turbulent surface zone, which lowers the chance of propulsion stoppage caused by wave surges or hull rocking. This design gives a more reliable and consistent power supply during heavy-load navigation or long-range operations, which greatly improves overall navigational safety.

The design of long-shaft outboard motors is meant to put the anti-cavitation plate of the propeller just below the hull's extension line. This makes them perfect for these kinds of boats:

1. 5–7 Meter Deep-V Fibreglass Speedboats:
Long-shaft outboard motors are standard on most deep-V boats. The sternplate height of deep-V fibreglass speedboats is around 50 centimetres, which is enough to keep seawater from flowing back into the boat when it is going fast. The long-shaft outboard motor can push through the high sternplate and steadily push the propeller down into the clear water layer below the keel. This depth keeps the propeller firmly in the water flow during fast side turns, which stops it from idling because of a shallow draft.

2. Workboats made of aluminium alloy that are between 5.5 and 6.5 meters long:
Safety is the most important thing for aluminium alloy boats, which have a raised, sealed compartment at the back. Long-shaft outboard motors keep the aluminium alloy boat's centre of gravity constant even when it's full. They can even escape getting splashed with salt spray in strong waves.
3. Medium and Big Ribs:
Most RIBs have a sturdy fibreglass V-shaped base, and the extended lever arm of the long-shaft outboard motor gives them more thrust. When doing emergency interception missions, the long-shaft propeller's downforce can better stop the bow from rising too high at takeoff, shorten the time it takes to get to a smooth sailing state, and let law enforcement officers see clearly and accurately as if they were walking on flat ground on rough waters.