Upgrading the outboard motor is not just a whim, but a way to significantly improve comfort and safety on the water. The GAZ reverse system (Reverse Distribution System) allows you to control the direction of propeller thrust without having to reach for a tiller or use complex mechanical traction, especially for owners of inflatable PVC boats and small boats, where every extra kilogram and complexity of the design matters.
The implementation of such a system requires careful preparation and understanding of the principles of work. two-stroke and four-stroke Installation may cause carburetor failure, loss of traction, or even damage to the lower unit. In this article, we will look at everything from the choice of components to the final setup. switch-over.
Before you start, it's important to know that you're interfering with the fuel system and the engine control system, and any error in sealing the joints could cause water to enter the carburetor, which would cause a hydraulic shock. The tightness of all fuel lines is an absolute priority.It is even faster than the speed of the work.
The principle of operation and the structure of the GAZ system
The system is to redirect exhaust gases or change the fuel mixture to briefly stop or reverse the rotation of the screw without using a standard gearbox if it is absent or modified. In the classical sense for small motors, this often means installing an additional valve that covers the supply of air or fuel, or mechanically changing the angle of rotation of the lower unit with fixation in the rearward position.
The main element here is cable-keeperIt's connected to a lever that acts on the flap or the steering mechanism, and it has to be as simple as possible to avoid jamming at the most inappropriate moment, and it has to be connected to a lever that acts on the flap or the steering mechanism. stainless steel And frost-resistant plastic, which is critical.
Many craftsmen mistakenly believe that it is enough to twist the cables. exhaust If the system uses gas pressure to (assist) in switching, you need to ensure that the exhaust is released freely in any position, and narrowing the channels will cause the piston group to overheat.
⚠️ Note: When modifying the exhaust system, make sure that the reverse thrust does not direct hot gases towards the fuel tank or the boat's structural elements, which can cause a fire.
Let’s look at the basic components you will need to build a reliable system:
- 🔧 Control cable with a soft braid to minimize friction and accurately transfer force.
- ⚙️ The locking mechanism (latch or stopper) to hold the ramper or damper in the selected position.
- 🛢️ Fuel hoses high strength, resistant to gasoline and oil.
- 🔩 Fastening elements from stainless steel (bolts, nuts, washers) to prevent corrosion.
Necessary tools and workplace preparation
You can't have a good installation without a good tool, you need not only a standard set of keys, but also specialized equipment for metal and plastic, and you need to make sure that the workplace doesn't get dust and dirt inside the engine, because even a small grain of sand can disrupt the work. carburetor.
Pay special attention to lighting, work with small details, such as jelly If you plan to drill holes in a lower unit or transom, be sure to use a core and cobalt-coated metal drill to avoid shifting and biting the tool.
Don't forget personal protective equipment. Gasoline and exhaust require good ventilation. If you're working indoors, you need a forced extraction, and chemical-resistant gloves to protect your hands from the aggressive fuel components.
Step-by-step installation instructions
The installation process begins with removing the safety casings and gaining access to the gas and reverse control node. Most Chinese and Japanese engines (Tohatsu, Yamaha, Hidea) have similar algorithms, but may have different mounting points. First, disconnect the regular gas cable to release the control lever.
Next, you'll install a new control mechanism, and if you're mounting a remote gas system, you'll need to drill a hole in a tiller or a transom to pull the cable out, and it's critical to treat the edges of the hole with a corrosion-resistant compound and install a rubber bushing so that the cable doesn't rub against the metal. Precision of positioning The cable determines how easy it will be to switch modes.
The next step is to connect the fuel line. If the GAZ reverse system involves changing the feed of the mixture, the tee should be inserted in accordance with the direction of flow. Use only special clamps that do not clamping the hose, but provide reliable fixation. After all the units are assembled, but before installing the casings, conduct a visual inspection for the tension of the cables.
☑️ Checklist before launch
The table below shows the recommended parameters for the various stages of installation:
| Work phase | Tool. | Key parameter | Risk of error |
|---|---|---|---|
| Drilling the transom | Drill 10-12 mm | perpendicularity | Shift of the cable axis |
| Fuel insert | Stationary knife | Joint density | Air suction |
| Tablet fastening | Carob key | Tension. | Incomplete stroke of the damper |
| Final assembly | Screwdriver. | Lack of gaps | Vibration of the casing |
Traction adjustment and adjustment
After the mechanical installation, the most important step is adjustment. The GAZ reverse system must work clearly: full gas - full speed forward, discharge gas - neutral, additional force - reverse (or corresponding position of the pump). Gaps. in the mechanism should be minimal, but do not cause constant tension of springs.
Start by setting up the idle, the engine must be running at minimum speed, not stalling or roaring. wire-line Or the valve closes the channel too early, and then you can loosen the nut at the end of the cable and make a few turns to increase the free length.
Check the synchronization of the work. When you move the control handle, there should be no jerks. If the cable is tight, lubricate it with graphite grease or replace it with a better one. Remember, water and salt, when you get inside the cable braid, quickly wash out the grease and cause corrosion, so only use it. waterproof.
⚠️ Warning: Never leave the adjustment nuts without a counternut or a threaded sealant. The vibration of the motor will inevitably lead to spontaneous unwinding and loss of tune on the water.
You may need a tachometer to be fine-tuned, plug it in according to the instructions, and make sure that the maximum speed is achieved with the throttle fully open. If the engine is not gaining its intended speed, it is possible that the GAZ system limits the stroke of the valve.
The secret to setting up the cables
Experienced motorists advise to leave a micro-backlash (about 0.5 mm) in the extreme position of the gas, so that the flap does not rest rigidly on the limiter of the carburetor, which prolongs the life of the node.
Typical errors and ways to fix them
Even skilled craftsmen make mistakes, especially when working with unusual designs. air-sucker It's through poorly connected fuel hoses, which lead to poor mixing, overheating of the engine and loss of power, which is a symptom of unstable idling and difficult start.
Another common mistake is choosing the wrong cable anchorage point: If the rope's angle of bending is too sharp, it will quickly rub and burst. Always follow the minimum bend radius specified by the cable manufacturer. Using cheap Chinese cables without Teflon coating also shortens the life of the system.
If you have new vibrations after you install the GAZ reverse, check the screw balance and the condition of the lower unit, and maybe the geometry of the mounting was broken, and now the loads are distributed unevenly. Rubber dampers They can help reduce noise and vibration, but they should not be the primary solution to the problem of distortion.
Use copper lubricant for threaded joints in contact with sea water – this will facilitate future disassembly and protect against boiling.
Maintenance and safety
The installed system requires regular maintenance. After each release, especially in salt water, it is recommended to wash the engine with fresh water. Pay special attention to the exit points of the cables and fuel connections. Corrosion The main enemy of any homemade, so visual inspection should become a habit.
Once a season, do a complete inspection of the control cables, remove the braids at the anchorages, check the internal veins, if you notice rust or damage to individual wires, the cable needs to be replaced immediately, a full-speed cable break is an emergency that can cost you a boat or health.
Also check the condition of the rubber elements: anthers, cuffs and hoses. Rubber blistering and cracking over time. Timely replacement of a penny part will save you from serious engine repair. Remember to lubricate the moving parts of the reverse mechanism.
Regular maintenance of the GAZ reverse system takes 15 minutes, but guarantees safety and no surprises away from the shore.
Benefits of refinement and final conclusions
Installing a GAZ reverse system is a step towards improving the ergonomics of boat control, allowing you to control the speed and direction of movement with one hand, which is especially convenient when fishing or maneuvering in difficult conditions, and also such upgrades often allow you to use more comfortable handlers or even switch to remote control in the future.
The main advantage is customization, you choose the length of the cables, the location of the levers and the type of fixation, but remember that any interference with the design removes the warranty obligations of the manufacturer, so all work must be done with an understanding of responsibility.
In conclusion, a competent GAZ reverse turns a conventional motor into a convenient tool. Compliance with installation technology, the use of quality materials and regular maintenance will ensure long and reliable service to your boating equipment. Don't be afraid to experiment, but always put safety above convenience.
Economic impact
The cost of self-installation of GAZ reverse is 3-4 times lower than the purchase of a factory remote control kit, while the functionality remains similar.
Can I install a GAZ reverse on an electronically controlled motor?
On electronic throttle (ETC) motors, the GAZ reverse mechanical system cannot be installed without complex electronics and control unit reworking, requiring additional electronic and throttle position sensors.
How often should the control cables be lubricated?
It is recommended to lubricate the cables with a special lubricant for the cables every 50 hours or once in the navigation season. If the boat is used in salt water, it is better to reduce the interval to 25 motor hours.
What if the engine lost power after installation?
Most likely, the leakage of the intake tract (air sucker) is broken or the cable does not allow the throttle to open completely. Check all the connections of the carburetor and make sure that the rope is not limited by improperly installed stoppers.
Does the GAZ reverse installation affect the engine guarantee?
Yes, any interference with the design of the fuel system and the engine control system will usually void the factory warranty, and manufacturers can easily detect traces of carburettor seals opening or non-standard holes in the lower unit.