Transporting a boat with an outboard motor is a task that requires not only accuracy, but also the right equipment. outboard motor support on trailer It solves two key problems: it protects the engine from vibrations and shocks while it's in motion, and it prevents it from being damaged when it's loaded/unloaded. Yamaha F25 or Mercury 15 It can get cracks in the pallet, bent lower unit or broken translance mounts.
Many owners of PVC or aluminum boats save on support, relying on the means at hand - wooden bars, ropes or foam. motor-repair Or worse, to replace it completely, like when you brake a trailer abruptly on a bump, it's not fixed. Tohatsu 9.8 It can hit the squirrel with force up to 200 kgThis is guaranteed to damage the anti-cavitation plate.
In this article, we will discuss what are the supports for the engines on the trailer, how to choose them correctly for a particular engine model, and also give step-by-step instructions for installation. quirky, which allow even experienced water engines, and on the nuances of transporting engines with long lower unit (for example, Suzuki DF20A>).
Why you need support for the motor on the trailer: risks and consequences
The basic function of the support is fixation Without it, the engine is exposed to the following risks:
- 🔧 Mechanical damage: cracks in the pallet, bent paddle shaft or lower unit when hit by a trench or road bumps.
- 💧 Oil leakage: vibrations can disrupt the leakiness of the osteoils, especially in two-stroke engines (see below).Honda BF5, Tohatsu MFS25>).
- ⚡ Electrical faults: wiring breaks or sensor damage (relevant for injection models, for example, Mercury 20 EFI).
- 🚛 Violation of trailer balancing: an unattached motor shifts the center of gravity, which is dangerous at speeds above 60 km / h.
According to the statistics of service centers, Up to 30% of outboard motor breakdowns during transportation are due to the absence or improper installation of the support on the trailerAnd it costs 40 to 70 percent of the cost of a new engine to repair a lower unit or replace a pallet. Yamaha F15 after a blow to the transom can pull on 80-120 thousand rubles.
And the support simplifies. loadingWithout it, you have to take the motor off the transom every time, which takes 10 to 15 minutes and increases the risk of engine failure. Attwood Motor Support or Seachange>) the process takes no more than 2-3 minutes.
⚠️ Attention: If you transport a motorized boat on a trailer without support, the insurance company may refuse to pay in case of an accident, citing a violation of the rules for the carriage of cargo (P. 23.3 of the traffic regulations of the Russian Federation).
Types of supports for outboard motors: a comparison of designs
All the supports are divided into three main typesEach of these is suitable for different operating conditions, depending on the weight of the engine, the type of trailer and the frequency of use.
| Type of support | Advantages | Deficiencies | Recommended engine weight | Approximate prices (2026) |
|---|---|---|---|---|
| Adjustable rack |
|
|
Up to 100 kg | From 8,000 to 25,000 |
| Fixed frame |
|
|
Up to 200 kg | 15,000 to 40,000 |
| Flexible belt with shock absorber |
|
|
Up to 30kg | From 3,000 to 10,000 |
For most owners of PVC boats with engines up to 25 hp The best choice will be pole-hold (for example, Attwood 10801-7> or Seachange SC-MS1> It combines reasonable price, versatility and ease of installation. 50 hp) better choose stationary frame with reinforced attachments, for example, Trailer Valet TV-5000>.
Flexible belts are suitable only for rare transportation of light motors (for example, for the use of lightweight motors). Mercury 3.5> or Honda BF2.3> Their main advantage is the ability to quickly remove the support and fold it into a backpack.
How to choose support for a specific motor: 5 key parameters
When buying a support, pay attention to the following specifications:
- Load capacity: must exceed the weight of the motor by at least 20%. Suzuki DF20A (weight 52 kg) needs a mount on the
65-70 kg. - The length of lower unit: the support must support the motor behind the lower part without touching the propeller. Yamaha F25 with lower unit
20") a height adjustable rack is needed. - Materials:
- 🛠️ aluminum: light, not rusting, but expensive (e.g., Attwood>).
- 🔩 Galvanized steelCheaper but heavier and requires corrosion-resistant treatment.
- 🧵 Stainless steelIt is best for sea water, but expensive.
- 🔧 Bolt-bolt: reliable, but requires drilling.
- 🧲 Magnetic: Quickly removed, but suitable only for metal trailers.
- 🔗 A belt.: universal, but less stable.
- Presence of depreciation: rubber inserts or springs reduce vibration by 40-60%, especially for motors with plastic palletsTohatsu MFS9.8>).
Example of selection:
- For Mercury 15> (weighing 38 kg, lower unit)
15"fit Seachange SC-MS1> (load capacity of 50 kg, aluminum, bolt mount). - For Yamaha F70> (weighing 112 kg, lower unit)
25") a fixed frame is required Trailer Valet TV-7000> (200 kg, stainless steel)
⚠️ Attention: If your motor has electric starter (for example, Honda BF50>, make sure the support does not block access to the battery, otherwise you will have to remove the mount every time to charge.
Check the weight of the engine in the technical data sheet
Measure the length of the lower unit (from the transom to the anti-cavitation plate)
Determine the material of the trailer (aluminum, steel, plastic)
Check the maximum speed of transportation (over 80 km / h need reinforced mounts)
Check compatibility with the engine tilt system (if any)
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Step-by-step instruction for installing a support on a trailer
You can install the support yourself in 1-2 hours.
- 🔧 Set of wrenches (10-19 mm)
- 🔨 A drill with drills on metal (if the mounting is bolt)
- 🧲 Magnetic level (to check the horizontal)
- 🧴 Anti-corrosion lubricant (e.g., Liqui Moly MoS2>)
- 📏 Roulette and marker
Step 1. Marking up
Put the motor boat on the trailer in the position of operation. Measure the distance from the transom to the point where the engine's lower unit will touch the support. Mark that spot on the trailer with a marker. For long-dadewood engines.20" and more") the support shall be placed on 10–15 cm below the anti-cavitation plate.
Step 2: Fixing the base
If the support is bolt-shaped:
- Drill holes in the marked places (drill diameter 0.5 mm less than the diameter of the bolt).
- Treat the edges of the holes with anticores.
- Secure the base of the support with bolts with growers, tightening their cross.
For magnetic fasteners, it is enough to clean the surface of the trailer from dirt and rust.
Step 3: Adjusting the height and angle
Set the motor in the working position and adjust the support so that:
- lower unit was lying on a pillow without skewing.
- The propeller did not touch the support (gap minimum)
5cm). - The angle of inclination of the motor coincided with the angle of support (use the level).
For motors with a system Power Tilt (for example, Mercury 50 ELPT>) check that the support does not block the tilt mechanism.
Step 4: Fixing and testing
Tighten all attachments with a dynamometer key (the moment of tightening is usually indicated in the instructions for the support).
- Shake the motor with your hands - it should not stagger.
- Drive 100 meters on a rough road and check the mounts.
- Make sure the support does not scratch the anti-cavitation plate (add a protective tape if necessary).
If the support interferes with the launching of the boat, use models with a quick-removal mechanism (for example, Attwood Quick Release>. They allow you to remove the mount in 10 seconds without tools.
Typical errors in installation and operation of supports
Even experienced water-engineers make mistakes that lead to breakdowns.
- 🔧 Wrong angle of support: if the motor is at an angle more
10°It puts a strain on lower unit. Suzuki DF9.9> can bend the propeller shaft when distorted. - 🔩 Weak tightening of the anchorages: vibrations on the primer weaken the bolts, it is recommended to check them every time
500 km. - 💦 Lack of protection against corrosion: galvanized supports without treatment rust in 1-2 seasons, especially in sea water.
- 🚗 Transportation without depreciation: rigid supports transmit all the blows to the motor. Yamaha F15 can crack the pallet when driving on bumps.
- ⚡ Ignoring electrical wiring: If the support presses on the starter wires or sensors, this can cause a short circuit.
A common mistake is the use of wooden-bar The wood absorbs moisture, swells and deforms, causing the motor to shift. Honda BF20> told how after the rain the bar swelled and bent the lower unit on the 3 mmThis required repairs of 18,000 rubles.
Another dangerous moment. motor-carriageIf the support does not support the weight evenly, the oil from the gearbox can leak into the crankcase, which will lead to oil starvation on the next start.Evinrude E-TEC>).
What happens if you transport the engine without a support?
When the trailer is braked at 60 km/h, an unattached 50 kg motor develops kinetic energy of ~800 J. This is equivalent to a sledgehammer hitting a transom.
- Cracks in the anti-cavitation plate (repair ~ 15 thousand rubles).
- Contorted rowshaft (replacement of ~30 thousand rubles).
- Fuel hose rupture (fire risk!).
- Displacement of lower unit bearings (capital repairs ~ 50 thousand rubles).
Review of popular models of supports: prices and reviews (2026)
The Russian market has support from American, European and Chinese brands, and we selected 5 models with the best price/quality ratio:
| Model | Type | Load capacity | Materials | Price (2026) | Pluses | Cons |
|---|---|---|---|---|---|---|
| Attwood 10801-7 | Adjustable rack | 50 kg | aluminum | 12 500 ₽ |
|
Not suitable for motors >25 hp |
| Seachange SC-MS1 | Adjustable rack | 70 kg | Galvanized steel | 9 800 ₽ |
|
Requires anti-corrosion treatment |
| Trailer Valet TV-5000 | Fixed frame | 200 kg | Stainless steel | 32 000 ₽ |
|
Complicated installation (welding required) |
| Cabelas Motor Mate | Flexible belt | 30 kg | Nylon + rubber | 4 500 ₽ |
|
Suitable only for lightweight motors |
| Yamaha Motor Support | Adjustable rack | 60 kg | Aluminum + Plastic | 18 000 ₽ |
|
High price. |
According to the owners, the best budget option is Seachange SC-MS1It's good for 90% of the engines up to 25 hp It is easily installed on any trailer. 50 hprecommended Trailer Valet TV-5000Despite the high price, it pays off due to reliability.
If you need support for rare trips, pay attention to the Cabelas Motor MateIt takes up little space and is quickly installed, but is not suitable for regular transportation.
For engines with long lower unit (> 20) choose supports with adjustment in height of at least 30 cm Otherwise the motor will touch the support propeller, which will lead to its deformation.
Alternative solutions: when the support is not suitable
In some cases, standard supports are not possible. Consider the alternatives:
- 🛶 High-transene boats: if the distance from the transom to the road is greater
1.2 m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m mThe answer is, you can't reach the foothold. diewood extension (for example, Bob's Machine Shop Extender> or homemade frame made of aluminum profile. - 🚗 Trailers without attachment spaceIf there is no free space on the trailer, use suspension (for example, Transom Saver>, which is attached to the transom and supports the motor from the bottom.
- ⚡ Electric motorsfor Minn Kota> or Haswing> is suitable for universal belt-holder (for example, Seachange SC-EM>, as the weight of such engines rarely exceeds the weight of the engine.
20 kg. - 🛠️ Homemade supports: if the budget is limited, you can make a support from an aluminum corner
40×40 mmAnd the car's rubber shock absorbers, and there's drawings on the forums. BoatDesign.net>).
For boats with hydrofoil (for example, Stingray>) standard supports are not suitable, as the motor is mounted at an angle. In this case, you need to order a custom frame from the trailer manufacturer (for example, Alumacraft> or Trailstar>).
If you are transporting a boat to roof (e.g., the trunk), the support will not help - the motor must be removed and transported separately in a case. luggage-holder (for example, Thule Hullavator>, which facilitates the lifting of the engine to the roof.
FAQ: Frequent questions about outboard motor supports
Can you drive a motor without a support if you drive carefully?
No, even at 40 km/h on a flat road, the motor is subjected to vibrations that eventually destroy the pallet and the lower unit. Mercury 9.9> after 10 trips without support may appear backlash in the bearings of the propeller shaft.
How often should I check the support mounting?
Before each trip, visually inspect the bolts and belts. Complete a check with the lift of the mounts every time you go. 500 km Or after driving off-road, for motors weighing more than one. 50 kg It is recommended to check the support every time 200 km.
Is one support suitable for different engines?
Universal supports (e.g., Attwood 10801-7>) are suitable for engines of the same weight class (for example, 5-25 hp). However, for engines with different lengths of lower unit, you may need to adjust the height. Yamaha F5> and Mercury 60>, it is better to have two separate supports.
Can I make a support myself?
Yes, but only if you've had experience with metal, a homemade support should:
- To withstand the weight of the engine with a margin of 30%.
- Have shock absorbing inserts (rubbers, springs).
- At least 4 points to be fixed.
- Do not block access to the engine drain plugs.
Example of design: frame made of aluminum profile 50×50 mm It's got rubber linings and bolt mounts. Drive2.ru> in the sections about boats.
How to transport the motor in winter?
In the cold season:
- Drink water from the engine cooling system (if any).
- Grease the support mounts Liqui Moly LM 40> for protection against icing.
- Cover the engine with a cover, but leave the ventilation holes so that condensation does not accumulate.
- If the motor is stored on the trailer for more than a month, remove it and put it on the side (so that the oils do not deform).