Soviet-era boat owners often face a dilemma: Continue to resuscitate their boats. wind-breed or Wind 12Taking time to find rare parts, or to decide to install a more affordable Chinese equivalent, the redesign of the outboard motor Winds for the Chinese engine is not just a replacement of hardware, but a complex engineering task that requires an understanding of the design of the lower unit, control system and mounting features.
The main attraction of Chinese units, such as Hidea, Parsun or YamabisiIt's because of the reliability and service support that the old Soviet models lack, but if you install a new engine on an old body or transom, you need to be careful about the geometry of the mounting plate and the length of the lower unit.
In this article, we will break down the technical nuances you will have to face and offer proven solutions to minimize the time spent upgrading your boat.
Compatibility analysis and donor selection
Before starting the locksmithing work, you need to conduct a thorough analysis of the seats. Wind had a specific scheme of attachment to the transom, which is significantly different from the standard ISOThe distance between the mounting holes and the height of the suspension may not coincide even within the same power.
Chinese engines with a capacity of 2-6 hp often have a shortened dead-water, which can be critical for some boat hulls designed for a longer leg. WindIt is important to measure the distance from the top mounting point to the anti-cavitation plate of the new motor and compare it with the existing cutout in the transom or bracket.
Also worth paying attention to the control system: If your old engine was equipped with a rumble gas, and the new Chinese unit has a remote handle or vice versa, you will need to rework the control cables or install adapters. Compatibility Shafts and slit joints when using an old lower unit leg are also under question and most often require the manufacture of a transition coupling.
- 🔍 Measure the distance between the centers of the fasteners on the transom of your boat.
- ⚙️ Check the length of the new Chinese engine in the technical data sheet.
- 🛠️ Evaluate the condition of the rompel mechanism and gas cables for reuse.
⚠️ Attention: Never attempt to attach the motor to only two bolts when there are four, which can cause vibration, the metal of the transom to break down, and loss of the engine while driving.
Required tools and materials
For a qualitative rework, you will need not only the Chinese engine itself, but also a certain set of tools and consumables. Working with metal requires the presence of a welding machine if you plan to digest the brackets, or a powerful drill with a set of drills for drilling holes.
Special attention should be paid to fasteners. Wind It is recommended to purchase a set of stainless bolts, nuts and washers of the appropriate diameter immediately to prevent corrosion in the future, and you will also need sealants to seal the docking places of the lower unit with the transom.
Don't forget about personal protective equipment and finishing materials. After welding or drilling the metal, you'll need anti-corrosion primer and paint to protect new holes and welds from aggressive aqueous environments.
☑️ Preparation for rework
Technical differences in fastening systems
The main obstacle to installation is the difference in the geometry of the suspension. Wind They were often fastened through a special rotary bracket, which was integrated into the transom, whereas Chinese analogues (in Chinese).Hangkai, Fisher) are usually fitted with a classical suspension with a clamping mechanism (clamp) or a bolt connection through a flat plate.
If you are planning to use your old lower unit leg Wind (which happens when you replace only a gasoline unit), you'll have the problem of docking the shafts. The diameter of the lower unit shaft and the location of the slits in Chinese engines are often different from Soviet standards, and in such cases, the only way out is to make a transition sleeve on a lathe.
Also, the height of the suspension is different. Chinese engines can be higher or lower, which will change the angle of the boat's trim, which in turn will require additional pads for an outboard motor or, conversely, trim the transom to achieve the optimal angle of attack of the propeller.
| Parameter | Wind 8/12 (USSR) | Chinese analogues (Hidea, Parsun) | Impact on reworking |
|---|---|---|---|
| Type of attachment | Turning bracket/Bolts | Clamping mechanism / Bolts | The need for a transition plate |
| Distance of the fastener | Non-standard (often 100-120 mm) | ISO standard (often 105 mm) | Drilling new holes |
| The length of lower unit | Enlarged (S, L) | More commonly standard (S) | Risk of cavitation or burrowing |
| Management system | The cable/tiller | More often tiller | Replacement of cables or tiller |
Features of slit joints
When you dock the shaft of the Chinese motor with the leg of the Winds, it often turns out that the number of slats is different (for example, 10 vs. 12). In this case, simple slatting is impossible - you need to make a new slatshoe sleeve from high-strength steel with subsequent heat treatment, otherwise the connection will "lick" after a few hours of operation.
Transpane dismantling and preparation process
We start by carefully dismantling the old engine. Wind You need to take a transom and carefully clean the attachment site of old paint, rust and sealant residues, so that you can accurately mark the new holes and assess the real state of the metal of the transmolatory board.
Apply a Chinese motor mounting plate to a transom and mark it. Use the building level to make sure that the motor is vertically mounted, and even a few degrees of distortion will cause the bearings to wear unevenly and vibrate at high revs.
If the holes don't match, you'll have to drill new ones. Before that, make sure to drill old holes into a larger diameter if you plan to install bushings, or brew them if they're no longer used. After drilling, degrease the surface and coat the metal slices with corrosion-resistant compounds.
Use a corer to accurately mark the centers of new holes before drilling – this will prevent the drill from being pulled away and ensure an accurate match with the motor mounting plate.
Installation of the transition plate and installation of the motor
In most cases, direct installation is not possible and requires a transition plate (adapter) – a metal plate at least 8-10 mm thick, which is attached to the transom of the boat on one side (on old holes or re-entered), and the other – takes over the Chinese engine.
The motor attachment to the transition plate must be done using rubber dampers or washers to quench the vibration. Metal on the metal without the gasket will quickly tire of the loads, and the bolts will spontaneously unscrew. Puff the bolts cross-cross, gradually increasing the force.
After you physically install the motor, connect the control system. WindMake sure it's moving as the Chinese carburetor flap is, and sometimes you have to shorten or lengthen the thrusts, and adjust the pull of the spring.
First start and setup of the carburetor
The first start after the rework is a critical moment. Pour a fresh fuel mixture (AI-92/95 gasoline and oil for two-stroke engines in a ratio of 1:25 or 1:50, according to the instructions for the fuel. chineseCheck for a jet of water from the control hole immediately after launch.
Chinese carburetors often require additional adjustments from scratch, factory settings may be too poor or rich for our conditions and fuel, adjust the quality and quantity of the mixture screws on the warmed engine, achieving stable idling speeds and a clear response to gas.
During the break-in (the first 2-3 tanks), carefully monitor the temperature of the body of the lower unit and the presence of extraneous noise. Vibration can weaken the fastening bolts, so after the first 30 minutes of work, be sure to pull all the connections.
⚠️ Attention: Do not allow the engine to work without immersion in water or with the intake hole closed even for a few seconds, this is guaranteed to overheat and jam the pump or piston group.
Frequently Asked Questions (FAQ)
Can I use a lower unit leg from the Wind with a Chinese engine?
Theoretically, it's possible, but it requires a lot of lathe processing, and you need to make a transition coupling to connect the crankshaft of a Chinese engine to a windwood shaft, given the difference in diameters and slits. It's often easier and cheaper to buy a Chinese motor complete with your own leg, because the reliability of homemade docking will be low.
Which screw is better to put on a converted engine?
The choice of propeller depends on the load of the boat and the type of reservoir. For light inflatable boats and fishing, propellers with increased pitch are better suited, and for heavy metal boats or cargo transportation, screws with a larger diameter and smaller pitch. Chinese engines are often equipped with universal propellers that can be replaced if necessary.
Should I change the fuel hose and pear when replacing the engine?
Yes, that. criticallyHoses and fittings for old Soviet and new Chinese engines may have different diameters and seal designs. Using old hoses with cracks or inappropriate fittings can lead to air suction, carburetor malfunction and fire hazards. Better use a new fuel kit that comes in a box with the engine.
Will the fuel consumption increase significantly after the replacement of the Wind with the Chinese?
Modern Chinese engines are generally more economical than older Soviet engines, thanks to better cylinder purging and better tightness of the crankcase. However, the real consumption depends on the configuration of the carburetor and the condition of the propeller, on average, savings can be 10-15% at the same power.
Successful reworking depends not so much on the power of the new engine, but on the quality of manufacturing transition elements and the accuracy of the alignment during installation.