Outboard Motors Wind They are among the most common in domestic water bodies, despite their age, and are popular because of their simplicity, availability of parts and maintainability, which allows owners to repair most of the faults themselves, but long years of operation often lead to wear and tear of the units, requiring skilled intervention.
Owners often face start-up problems, power loss or overheating, signaling a maintenance need. wind repair 8 This allows you to extend the life of the unit for many years without expensive replacements, and in this article we will discuss in detail the main stages of diagnostics and restoration of engine performance.
Diagnosis and preparation for repair
Before disassembly begins, you need to determine exactly the nature of the malfunction, the engine may not start due to lack of spark, problems with fuel supply or compression, it is important to conduct a visual inspection for fuel leakage, oil and mechanical damage to the lower unit.
The sparking test is done by twisting the candles and pressing them to the "mass" when scrolling the starter. If the spark is weak or absent, you should check. magneto And the condition of the high-voltage wires, and often the problem is oxidized interrupter contacts or a breakdown of the capacitor.
The compression is tested with a compressometer, screwing it into the candle hole. Wind 8 It's considered to be a pressure in the 8-10 atmosphere range, and much smaller numbers indicate wear on the piston group or rings.
⚠️ Before starting any work, be sure to disconnect the fuel hose and drain the remaining gasoline from the carburetor to avoid ignition of vapours.
A full diagnosis would require a set of tools: wrenches, screwdrivers, flywheel detachment and, preferably, a pressure gauge, without an accurate understanding of the cause of the breakdown, further action may be useless.
Disassembly of the engine and maintenance of the carburetor
Removing the carburettor is a critical step that requires care. Wind It's sensitive to the quality of the mixture and the purity of the channels, and often the cause of unstable operation is clogging of the chicklers or a violation of the regulation of the fuel level in the float chamber.
When disassembling, you need to carefully examine the gaskets and glands, rubber seals eventually tan and lose elasticity, which leads to air sucking. Air suction causes impoverishment of the mixture and overheating of the piston.
Cleaning the carburetor is better to make a special liquid-cleaner, blowing all channels with compressed air. Mechanical cleaning with wire is prohibited, since you can change the passage section of the jellyclera, which will violate the calculated parameters of mixing.
Pay special attention to the condition of the float and saddle needle. The presence of a coke or a production leads to a fuel overflow. The adjustment of the fuel level in the float chamber is made by bending the tongue of the float according to technical requirements.
⚠️ Never use acetone or aggressive solvents to clean rubber carburettor parts, this will lead to their destruction.
When assembling the carburetor, lubricate the axis of the throttle with graphite lubricant to prevent jamming.
Ignition adjustment and magneto check
Ignition system Wind 8 - Contact-thyrinist (on later models) or Magdinos. spark-light (UHO) is critical to engine power and life, and shifting the moment of sparking even a few degrees can lead to detonation or overheating.
Adjustment is made by rotating the base of the magneto relative to the stator. To fine-tune it, a strobe or indicator device is used. The gap between the contacts of the interrupter should be between 0.35-0.45 mm.
☑️ Checking of the ignition system
If the breaker contacts have deep charcoal or sinks, they need to be replaced or slapped with a fine overfill. Contact oxidation is a common cause of spark loss at high revs. It is also worth checking the condition of the capacitor, since its breakdown disables the entire system.
Ignition plugs require special attention. The electrode can tell you about the state of the engine: black soda indicates a rich mixture, white indicates poor or overheating. The optimal color of the insulator is light brown.
What to do if there is no spark with proper candles?
If the candles are new and there are no sparks, check the stop button and the wires. Often the circuit happens at the switch itself or at the connection of the wire to the mass.
Defection of the piston group and cylinders
Removing the cylinder head opens up access to the piston group, which is the heart of the motor, and there should be no compromise. Visually assess the state of the cylinder mirrors: having deep bulls requires welding or replacing the unit.
Piston rings must have a good thermal clearance, and the test is done by placing the ring in the cylinder and measuring the gap with a probe, and the wear of the rings causes the compression to fall and the oil to be thrown into the combustion chamber.
| Parameter | Norma. | Limit value | Method of verification |
|---|---|---|---|
| Compression | 8-10 atm | less than 6 atm | Compressometer |
| Ring gap | 0.2-0.4 mm | more than 1.0 mm | The chip in the cylinder |
| Candle gap | 0.6-0.7 mm | tan | Squirt/Visually |
| Interceptor contact | 0.35-0.45 mm | less than 0.3 mm | The spike is flat |
When assembling a piston group, it is important to properly install the ring locks, which must be deployed in different directions and not coincide with the windows in the cylinder, and failure to comply with this rule leads to gases breaking through and loss of power.
Notice the condition of the rod bearings. The rod rod is not allowed. If there is a knock or a free ride when the rod is swaying, the bearings must be replaced. needle bearings It requires high quality lubrication when assembled.
lower unit repair and replacement of gums
lower unit Wind 8 It has a gearbox and a water cooling system, and the main problem here is the loss of sealing of the ossels, which leads to water getting into the oil or oil into the water, and the white emulsion on the gearbox probe is a sure sign of malfunction.
Replacement of the glands is done after the complete dismantling of the lower unit. Old cuffs are removed carefully so as not to damage the seating of the shafts. New glands are recommended to be lubricated with lithium lubrication before installation to facilitate planting and initial operation.
The main reason for water to enter the gearbox is the destruction of the cuff seal of the paddle shaft or damage to the body of the lower unit.
The cooling system also requires attention: holes in the water pump and cooling shirt are often clogged with algae and sand, cleaning the channels with brushing and purging restore normal circulation of antifreeze (water).
The paddle shaft and the shaft of lower unit must be lubricated, the lack of lubrication leads to the boiling of the shafts, after which disassembly becomes extremely difficult, and regular maintenance of this unit will save you from serious problems in the future.
⚠️ Attention, when you build a lower unit, you'll be careful what the shafts match, and if you try to force the halves of a lower unit, you'll damage the shafts.
Engine assembly and break-in
The motor is assembled in reverse disassembly, and you pay special attention to the tightening of the bolts of the cylinder head, and you make a cross-puff, gradually increasing the force to ensure that the gasket fits evenly.
All threaded connections are recommended to be treated with a thread fixer, since the vibration of the two-stroke engine can weaken even tightly twisted nuts. Check the free running of all throttle and suction valve control thrusts.
How to check the tightness of the crankcase?
Put the engine without the carburetor, plug the inlet, and put the knot in the water, blow the outlet, and the bubbles point to the leakage.
The first run after repair should be on the stand or in a barrel of water, let the engine warm up at idle speed, check for leaks, idling stability and reaction to the opening of the throttle.
It takes a few hours to run a full break-in, and it's not recommended to put a full load on it, and you can make the oil and gasoline for running a little bit richer (1:25) to make the rubbing surfaces better lubricated.
Frequently Asked Questions (FAQ)
Why is Wind 8 stalling at high speeds?
This is most often due to interruptions in the ignition system (breaking the coil at high speeds) or lack of fuel (clogged jeeler or air tank), and it is also possible to suck air through the gasket under the carburetor.
Which oil is best used for running?
For running and operating two-stroke motors Wind Specialized outboard oils labeled TC-W3 are best suited. Mineral oils are cheaper but create more sodium.
Can I use the AI-95 instead of the AI-92?
The use of gasoline with a higher octane number is not recommended for older engines with a low compression ratio, as this can lead to overheating and burnout of the piston.
How often should I change the lower unit silk?
It is recommended to replace the lower unit and crankshaft oils every 2-3 seasons of active operation or when the first signs of water entering the oil appear.