The purchase of a new outboard motor is always an event marking the start of the active season, but it is the first hours of operation that determine how long the unit will serve faithfully. Parsun At 9.8 horsepower, you need to understand that factory assembly, even high-quality, requires a period of grinding of rubbing parts. Ignoring this stage or disrupting technology often leads to piston group bullies and loss of compression long before the warranty period expires.
The breaking in process is necessary to smooth out the micro-nerves on the metal surfaces and to make the piston rings perfectly shaped relative to the cylinder. Parsun 9.8 It is particularly sensitive to the quality of the lubricant during this period, since the oil goes directly to the combustion chamber along with the fuel. Incorrect mixing or working at full speed at the beginning of operation is guaranteed to overheat and deform parts.
In this article, we will take a look at all the preparation, refueling and operating modes that will ensure a long life for an engine, learn about the critical nuances that are often silent in service centers, and get clear instructions on how to act on water, and following these rules is not just a formality, but an investment in the reliability of your boat.
Preparation of the engine for the first start and choice of oil
The first thing the owner faces before launching is choosing the right oil for the fuel mix. Parsun T9.8BMS series requires the use of labeled oils TC-W3The use of automotive oils or lubricants for garden equipment is strictly prohibited, as they form a deposit and clog the exhaust channels.
The quality of gasoline is also crucial: the octane number should be no lower than the AI-92, and the fuel itself should be fresh. Old fuel, which has been in the canister for more than a month, loses its properties and can lead to unstable work of the carburetor. Before mixing, be sure to shake the canister with gasoline to exclude the presence of water at the bottom.
⚠️ Attention: Never store the finished fuel mixture for longer than 2-3 weeks. The oil in gasoline oxidizes over time and loses its lubricating properties, which is harmful to the crank-shaking mechanism.
Mixing ratio for the break-in period is a critical parameter. Although the instructions may specify a ratio of 1:50 for normal use, during laundry it is better to use a richer mixture of 1:40 or even 1:33, this will ensure excess lubrication of rubbing vapors and will help to avoid local overheating under variable loads.
Use a measuring cup with a clear scale to mix oil and gasoline. The glazing is unacceptable in this matter - an error of a few grams can cost the engine a resource.
breaking in stages: from idling to full power
Engine break-in process Parsun 9.8 It's divided into several time slots, each with its own speed limits, the first stage takes the first 10 minutes of operation and is done idling, the engine needs to warm up evenly, and all the seals take their operating dimensions.
After the initial heating, the main stage begins, lasting about 8-9 hours, during which it is forbidden to develop full power, the turnover should vary but not exceed 70-80% of the maximum, sharp openings of the throttle are unacceptable, the gas should be added smoothly, without jerking.
- 🕒 0-10 minutes: work only at idling, check the cooling system and the absence of leaks.
- ⏱ 10 minutes - 2 hours: movement at minimum speeds, periodic short-term accelerations up to 50% of power.
- 🚀 2 to 10 hours: work at medium speeds (up to 75%), avoiding long-term work at one constant speed.
Working on full gas in the first hours will cause the piston to expand faster than the cylinder, which will cause bullies, and only after 10 hours you can briefly go to full power to check the dynamics.
Temperature and cooling system control
Water cooling system on motors Parsun 9.8 It is mandatory and requires constant monitoring. During the break-in, you should regularly, every 15-20 minutes, visually check the control jet of water coming out of a special hole.
Overheating is the main enemy of the aluminum alloys that make up the cylinder block. As the temperature rises, the metal expands, and the gaps that must form during laundry disappear. This leads to a jamming of the piston. If you notice vapor from under the casing or smell burning, immediately turn off the engine.
Particular attention should be paid to the position of the lower unit. When driving at low speeds or when running on a barrel, the motor can capture its own suspension, that is, already heated water, in such cases, you need to periodically raise the motor or move against the current to ensure the intake of cold water.
Table of breaking in modes
For ease of control of the grinding process, it is recommended to adhere to the following load schedule, this table is compiled on the basis of the manufacturer's recommendations and experience in operating two-stroke engines of low power.
| Time to work. | Throttle mode | Restriction of speeds | Action |
|---|---|---|---|
| 0 - 10 minutes | Idle move | ~1000 rpm | Warming up, jet check |
| 10 minutes - 2 hours | Small gas | up to 3,000 rpm | Smooth acceleration |
| 2 - 8 hours | Medium gas | 4500 rpm | Variation of speed |
| 8:10 hours | Full gas. | 5500 rpm | Short-term (1-2 minutes) |
| After 10 hours. | Any regime | No restrictions. | First fuel drain |
Timekeeping is more important than accurate speeding. If you can't control the tachometer's speed, focus on the position of the vomit and the speed of the boat. The main rule is not to keep the throttle in one position for a long time.
The most common mistake is running at constant average speeds for a long time, and the engine needs a shake and a change in load modes to properly grind the rings.
Post-run maintenance
The completion of the 10-hour break-in cycle marks the transition to the first maintenance, at which point a series of procedures must be performed to prepare the engine for full operation, and the first step is to replace the oil in the gearbox, even if the manufacturer claims that it is flooded for the entire life.
When grinding gears, the products of wear (metal shavings) can get into the oil, draining the old oil and washing the gears will allow you to visually assess the condition of the gears, the oil should be transparent, without silvery shine and emulsion.
- 🔧 Ignition plugs: Turn the candles and look at the carbon. The color should be brick brown. White nagar is poor, black is rich.
- 🔩 Fastening: Stretching all available bolt joints, especially the lower unit mount to the lower unit leg and carburetor screws.
- 💧 Fuel system: Replace the fuel filter-sludge tank and wash the fuel tank from possible sludge.
It is also recommended to check the tightening of the propeller nut. Vibrations in the first hours of operation could weaken it. Use the dynamometer key to set the tightening moment according to the manual to avoid cutting the splint or damage to the shaft.
☑️ Post-roll-in TO
Typical errors and precautions
Statistics of service centers show that most engine failures Parsun In the first year of operation, it is due to a violation of the rules of running in, and often owners, wanting to check the dynamics of the boat, immediately give full gas, which leads to overheating of the piston group in the first 30 minutes of operation.
Another common mistake is to use poor-quality fuel or to disrupt the proportions of the mixture: saving on oil or buying gasoline at dubious gas stations results in expensive repairs of CNG (cylinder-piston group).
⚠️ Attention: Do not run the engine in a static position (on a barrel) for more than 15 minutes without a break. This can lead to overheating of the lower parts of the engine, where the water circulation is less intense.
Keep the safety rules in mind. Always carry a spare candle, a key to unwrapping it, and a spare fuel mix when you're running on the water. Breaking away from shore due to small things can ruin your entire vacation.
What happens if you don't run it?
If you ignore the break-in, the engine life will be reduced by 40-50%, the piston rings will not be hermetically blurred, which will lead to a decrease in compression, increase fuel consumption and reduce maximum power, in the worst case, a full-speed piston wedge is possible.
Frequently Asked Questions (FAQ)
Can I run the Parsun 9.8 engine in a barrel of water?
Yes, it is acceptable for initial start and check of operation of the cooling system within the first 10-15 minutes, however, full break-in under load is better to carry out on water, as in the barrel it is difficult to provide stable intake of cold water and simulate real conditions of operation of the screw.
Which oil is better to use for running: mineral or semisynthetic?
For two-stroke air or water-cooled motors such as Parsun, it is better to use special outboard oils (TC-W3). Mineral oils are often recommended for the break-in period of new motors, as they provide a denser oil film at high temperatures, although modern semisynthetics also show excellent results.
Do I need to change the candles after the test?
Replacement of candles after running is not mandatory if they work steadily, but they need to be twisted and inspected. If the electrodes are clean and have the right color of soda, the candles can be used further. If there are doubts about their performance, it is better to replace the kit.
How much fuel do you need to use for the first break-in?
It is usually recommended to develop the first full tank of the fuel mixture (about 12-15 liters for a tank of standard volume) in a gentle mode, which corresponds to about 8-10 hours of operation, which is the standard for initial grinding of parts.