Transporting a 9.9 hp outboard motor is often a major challenge for small boat owners, especially if it comes to models with a long leg or heavy lower unit. outboard motor trolley 9.9 It's not just an accessory, it's the right equipment to keep your back and prolong the life of the machine. The lack of a special transport device forces owners to either carry 35-45 kg per weight or risk putting the unit in the trunk of the car sideways, which is strictly forbidden for most two-stroke and some four-stroke models.
The use of a specialized rack allows you to safely move Tohatsu, Yamaha, Honda or Suzuki In fact, a well-designed cart is a great place to store and maintain the engine in the winter, and in this article we will discuss in detail how to choose a ready-made solution or make a reliable design yourself from available materials.
Why do you need a cart to transport the engine?
The main function of the trolley is safe vertical transportation: 9.9 hp motors weigh between 35 and 48 kg depending on the model and the availability of an electric starter, and carrying such a load over 50 meters without support is a direct route to back injuries or sprains. Vertical rack It allows the motor to roll on the ground, relying on two wheels, which reduces the load on the operator to a minimum.
In addition to ergonomics, the cart is designed to address the issue of the proper position of the engine during storage. boat-engine It must be stored strictly vertically or on a specific side so that oil does not leak into the cylinder or carburetor. improvised drawer stands are often unstable and can tip over from wind or careless movement, damaging the lower unit or carburetor.
Also worth mentioning is the convenience of service. transporter With wheels, it's easier to get to all sides to replace a candle, to lubricate or to flush the cooling system, and you can easily roll the unit to the water source or to the shade for repair without lifting it.
⚠️ Warning: Never leave a motor mounted on a lightweight homemade cart unattended in high winds or on uneven surfaces. The center of gravity is shifted upwards, and a gust of wind can overturn the structure.
There are different configurations of supports, from simple T-shaped pillars to complex frames on four wheels, depending on whether you plan to carry only the motor or also the motor. battery And the 9.9 hp engine is the best-selling classic two-wheeler with a lower unit focus.
Criteria for choosing a finished cart
If you don't want to do welding and materials searching, the market offers a lot of ready-made solutions. When choosing a 9.9 hp factory cart, first of all, pay attention to the fact that you're not going to be a manufacturer. loading capacityAlthough the motor weighs about 40 kg, the safety margin must be at least two times to take into account the dynamic loads when driving on irregularities.
The second important parameter is the type of wheels, and for fishing and hunting, where you often have to move on sand, grass or mud, you need to do it. pneumatic wheels Plastic cast wheels are only suitable for smooth asphalt, they will knit or slide on a gravel, and the width of the tire is also important: the wider it is, the better the passability.
Third, the diewood mounting system, and the different brands of engines have different shapes of the lower unit heel, and the universal carts have adjustable height and width. foot-platform Make sure the design is able to securely lock the motor with the belts so that it doesn't vibrate when you're driving.
- 🚤 Frame materialAluminum profiles don't rust, but powder-painted steel is stronger and cheaper. Aluminum is preferred for salt water.
- 🔧 AdjustmentsThe presence of a telescopic bar will allow you to use a cart for engines of different heights of lower unit (S, L, XL).
- ⚖️ Own weightLightweight trolley (5-7 kg) is convenient when loading in a car, but may be less stable with a heavy motor.
Materials and tools for self-assembly
Making a cart yourself is a great way to save money and get a device that is ideal for the dimensions of your car. boat-engineFor the frame most often used profile tube square section 20x20 mm or 25x25 mm with a wall thickness of 2 mm. rolling-out It provides sufficient rigidity and does not overweight the structure.
If welding is not possible, bolts can be used, but this will require more precise drilling and cornering, which will increase the weight and dimensions. The main consumables will be: profile pipe, sheet steel for the support pad (thickness 3-4 mm), bolts M8-M10. polyurethane wheels And the belts to hold.
Alternative materials for the frame
If you don't have access to welding, you can use thick-walled aluminum pipes and special crab systems (crosses) to connect them, but this design will cost more and be inferior in strength to a steel welded frame when hitting stones.
Don't forget about corrosion protection. The metal trolley will be in constant contact with moisture, salt and splashes of fuel. So immediately buy a primer for metal and high-quality enamel that is resistant to abrasion. Galvanized cells The stains will also extend the product’s life.
| Component | specifications | Approximate cost (ruble) | Where to buy |
|---|---|---|---|
| Profile tube | 25x25x2 mm, 6 meters | 600 - 800 | Metal bots |
| Pneumatic wheels | 2 pcs, d = 200 mm, axis 20 mm | 1200 - 1800 | Construction market |
| Sheet steel | 3 mm, 0.5 m2 | 300 - 400 | Metal bots |
| Fixtures and belts | Bolts, nuts, sling 2m | 500 - 700 | Auto shops |
Step-by-step instructions for assembling the trolley
The assembly process begins with a drawing or at least a sketch with dimensions. The standard height of the 9.9 hp rack is about 90-100 cm from the ground to the top mount, so that the lower unit hung in the air without touching the ground. Support area It should be 10-15 cm from the ground to take on the weight of lower unit.
First, the main U-frame is welded, the vertical struts are joined by lintels, and it is important to ensure that the frame angle is about 10-15 degrees back, so that the center of gravity of the motor falls on the axle of the wheels, not on the handles of the operator. At the bottom of the frame, weld mounts for the wheel axles. Axes can be made from M16-M20 studs or use ready-made solutions from garden equipment.
☑️ Checklist for frame assembly
Then you make a shoe or a lower unit pad, and it can be just a horizontal shelf of metal with holes for water drain, or a U-shaped profile that covers the foot of the engine from the bottom. For 9.9 hp engines, it is critical that the pad is wide enough and has an anti-slip coating (for example, a rubber mat), because it is very important that the pad is sufficiently wide and has an anti-slip coating (for example, a rubber mat). vibration When moving, it can move smooth metal.
The last step is to install a transport handle and a locking system, and the handle should be removable or telescopic for easy storage, and use two belts to hold the motor, one that locks the lower unit to the pad, the other that locks the lower unit to the vertical rack, to prevent the load from swaying.
⚠️ Warning: When welding a thin-walled profile, observe the regimes so as not to burn through the metal. Check the geometry of the frame with a coalstone after each grip, otherwise the cart will be crooked.
Use rubber inserts (such as from hoses or old tires) in the contact metal frame with the body of the engine, this will protect the paintwork of the lower unit from scratches and chips when vibrating.
Adaptation to different engine models
Motors with a capacity of 9.9 hp are produced by many brands, and their dimensions can vary significantly. Yamaha 9.9 It often has a more compact lower unit than Tohatsu 9.8 or Chinese equivalents like HideaThe universal trolley must have a margin of adjustments.
The key to adapting is the height of the support pad. Some engines have shorter days, and if you hold the pad too low, the motor will hang too high, shifting the center of gravity. If it's too high, the foot will drag on the ground, the solution is to make the pad removable on bolts or provide several pairs of holes for attachment at different heights.
Also important is the width of the grip. lower units are narrow and wide. If you're planning to drive different engines, make the side limiters on the pad sliding. Adjustable stops will allow you to reliably fix both compact two-strokes and more overall four-stroke models.
- 🛠️ Fixing to the transom: Some carts have an adapter that mimics the transom of a boat, where the motor is fastened with a standard propeller. This is the most reliable way, but it is difficult to implement.
- 🎣 Additional hooks: Consider the suspension hooks of the fuel and oil canisters. This will unload your hands, but remember the balance.
- 🌊 Water protection: If the cart is stored outside, provide a removable cover or plastic engine casing for prolonged downtime.
Operation and care of the trolley
Even the most durable trolley requires maintenance, especially if it is used in an aggressive environment. After every trip to the sea or fishing in salt water, the structure must be rinsed with fresh water. Corrosion It quickly destroys welds and threaded joints, making operation dangerous.
Check the condition of the wheels and bearings regularly. Sand and dirt stuffed in the axle can jam the wheels or cause a backlash, which will cause the engine to swing when driving. Once a season, it is recommended to lubricate the axles and bearings. lithium-lubricant Or solidol.
Timely painting of scratches on the frame prevents deep corrosion of the metal, just clean the damaged area and cover it with anticory or paint in a can.
If you can't, you should keep the cart in a dry room, cover it with a thick awning or plastic to avoid precipitation, and pay special attention to the seat belts, which are rubbed first and require periodic replacement.
Can I use a cart for motors more powerful than 9.9 hp?
Yes, if the frame is welded from the profile with a margin of safety (for example, 30x30 mm or 40x20 mm) and wheels with a higher load capacity are installed. However, for motors over 15 hp (weight 45-50+ kg), the two-wheel scheme may become unstable, and it is better to consider a four-wheel trailer or a cart with a wider base.
What is the best wheel diameter for a sandy beach?
For sand and soft ground, the minimum wheel diameter should be 250-300 mm. Narrow wheels (less than 80 mm wide) will burrow into the sand. The ideal option is wide pneumatic wheels from garden wheelbarrows or specialized "swampers".
Do I need to remove the motor from the cart when the car is moving?
Yes, it is absolutely impossible to transport a car with a motor installed on the trolley, unless the trolley is a full-fledged trailer with registration and light signals. The trolley is a manual device for moving over short distances (up to 1-2 km).
How to fix the battery on the cart?
A 9.9 hp battery is not normally required (launch starter), but if you have an electric starter, you can weld an extra shelf at the bottom of the frame, between the wheels. This will lower the center of gravity. The shelf should have a sideboard and a strap to lock the battery so that it doesn't fall off the bumps.
What to do if the cart starts to rust?
You have to completely clean the rust with a metal brush or a grinder to the pure metal, then degrease the surface, prime and paint it, and if the rust is through (holes), you have to make patches or reinforce the structure with new elements.