Outboard Motors stealth We've long established a reputation for "people's" engines -- affordable, maintainable and adapted to Russian realities. But how good are they in practice? real owner reviews from 2020 to 2026We analyzed typical problems and compared popular models from compact to compact. Stealth 3.5 powerfully Stealth 20There are no advertising slogans, only facts: how motors behave after 3-5 seasons of operation, what "diseases" appear most often and whether to overpay for Japanese counterparts.
We'll pay special attention. fuel-flow (spoiler): Stealth 9.9 It is 15-20 percent higher than the stated rate. gearbox (Critical point after 500 hours) and service - where is it cheaper to repair, which parts fly first. stealsom and Yamaha/HondaHere you will find arguments for and against with figures and examples from life.
1. Overview of the Stealth range: which motors are most often bought
Lineage Stealth includes engines with a capacity of 2.5 to 20 hp, but 80% of sales are accounted for by three models:
- 🛥️ Stealth 5 - "workhorse" for PVC boats up to 3.5 m. Popular among anglers for low consumption (1.8-2.2 l / h) and weight 26 kg.
- ⚡ Stealth 9.9 The gold standard for boats is 3.6-4.2 m, two-cylinder, with electric start in the top version, the main drawback is noise at high speeds.
- 💪 Stealth 15 - maximum power for unregistered boats, suitable for aluminum hulls, but requires a reinforced transom.
Less demanded Stealth 2.5/3.5 (weak to flow) and Stealth 20 Interesting fact: after 2022, demand for Stealth 9.9 The increase was 40% - the owners explain this by a combination of price (~ 180 thousand rubles) and the possibility of remaking for gas (about what is below).
Important: all engines Stealth Manufactured in China under license of Japanese company Parsun And so there's this ambiguity, which is that there's Japanese technology on the one hand, and there's Chinese build quality on the other, and you can see how that affects the resource in the next section.
Resource and reliability: how much does the Stealth motor in practice
According to the service centers, the average resource of the engines Stealth before major repairs:
| Model | Resource (motowatch) | Typical breakdowns | Cost of overhaul (2026) |
|---|---|---|---|
| Stealth 5 | 800-1200 | Reciprocating wear, leaking gum | 25-35 thousand rubles. |
| Stealth 9.9 | 1000-1500 | Reductor, crankshaft bearings | 40-55 thousand rubles. |
| Stealth 15 | 1200-1800 | Overheating of the block head, corrosion of the shells | 60-80 thousand rubles. |
The key issues that owners warn about:
⚠️ Attention: Motors. Stealth critically fuel-in-qualityWhen you use gasoline with an octane number below 92 units, after 200-300 hours, you get soak on candles and valves. AI-95 from checked gas stations (Lukoil, Gazpromneft).
- 🔧 gearbox: weakness of all models: When operating in salt water, it requires washing after each exit (otherwise corrosion in 1-2 seasons).
- 🔥 Overheatingon Stealth 15 The thermostat often flies, and the symptom is a temperature above 90°C under normal load.
- ⚡ Electronics: in electric-start motors (Stealth 9.9 ES) the starter fails after 3-4 years.
How to check the Stealth motor when buying used?
1. Start at idle speeds - should work smoothly, without vibrations.
2. Check the compression (normal: 8-10 kg / cm2 for 5-9.9 hp, 10-12 kg / cm2 for 15-20 hp).
3. inspect the gearbox for oil leaks (black spots for an outboard motor).
4. Ask the seller to show the service book - without regular maintenance, the engine will last 2 times less.
According to reviews, the record holder for reliability - Stealth 5 The 2018-2020 edition, and the owners note that with proper maintenance, it can nurse up to 1,500 hours of motorized driving without capital. Stealth 20 scold ignition problems The coils fail after 2-3 seasons.
3. Fuel consumption: real figures vs declared
The manufacturer declares the following consumption figures:
- Stealth 5: 1.5-1.8 l/h
- Stealth 9.9: 2.5-3.0 l/h
- Stealth 15: 4.0-4.5 l/h
But the real numbers are 15 to 30 percent higher, according to the owners.
Fuel consumption of Stealth motors is strongly affected screw-stateCurved or damaged blades increase gasoline consumption by 20-40%.
| Model | Claimed expenditure | Real expenditure (by reviews) | Test conditions |
|---|---|---|---|
| Stealth 5 | 1.5-1.8 l/h | 1.9-2.2 l/h | Boat 3.2 m, 2 people, calm water |
| Stealth 9.9 | 2.5-3.0 l/h | 3.2 to 3.8 l/h | Boat 3.8 m, 3 people, weak current |
| Stealth 15 | 4.0-4.5 l/h | 5.0-5.5 l/h | Boat 4.5 m, full load, wave 0.5 m |
The Secret to Savings: Owners Stealth 9.9 recommend installing a screw in step 9.25" standard 10" This reduces the flow rate by 0.3-0.5 l / h, but loses 5-7% of the top speed. carburettor (every 100 hours of motorbike).
⚠️ Attention: When using a gas engine (reworking under HBO), the consumption increases by 10-15% due to power loss, but the savings on fuel reach 40-50%.
4. Repair and parts: where is cheaper to repair and what breaks more often
One of the main advantages Stealth — low-cost compared Yamaha or MercuryFor example:
- 🔩 A set of piston rings for Stealth 9.9: 3,000 to 4,000 rubles (y Yamaha F9.9 - RUB 8-10 thousand.
- 🛢️ Reductor oil
SAE 80W-90: 500-700 rubles / l (original) Yamaha - 1200-1500 rubles. - ⚡ The ignition coil: 1.5-2 thousand RUB (y) Honda - 4-5 thousand rubles.
Where to fix:
- Official services (guarantee 2 years, but expensive - 1.5-2 thousand rubles / normal hour).
- Independent workshops (It is cheaper by 30-40%, but the risk of running into amateurs)
- Independently. - Stealth There are many video instructions (for example, replacing the gum reducer takes 1.5 hours).
☑️ What should be in the repair kit for stealth
Typical "diseases" by model:
- Stealth 5: flow through the oedle of the paddle shaft (treated by replacement for 1.5 thousand rubles).
- Stealth 9.9: wear gears gear gear gear gear gear gear gear (symptom - crunch when changing gears).
- Stealth 15: cracks in the thermostat cover (replacement - 2.5 thousand rubles).
The advice from the masters is to buy parts only from trusted suppliers. Counterfeit (especially Chinese piston groups) reduce the life of the engine by 2-3 times.
stealth-motors.ru, lodka-motor.ru and 4boat.ru.
5. Gas conversion: Is the game worth the effort?
Translation Stealth Gas cylinder equipment (GBO) is a popular solution among owners who use the engine a lot.
- 💰 Savings: 1 liter of gasoline 1.3 liters of gas, but gas is cheaper by 2 times. The payback of the reworking is 1-1.5 season.
- 🌱 Eco-friendly: less soda on pistons and candles.
- 🔧 Simplicity: for Stealth 9.9/15 There are ready-made BOE kits (for example, Lovato or BRC).
Cons and pitfalls:
⚠️ Attention: After converting to gas, the engine loses 8-12% of its power. Stealth 5 - the boat is worse at planing. Stealth 15 The losses are less noticeable.
Cost of reworking (2026):
- Set of HBO (reducer, cylinder, highway): 18-25 thousand rubles.
- Installation: 5-8 thousand rubles. (can be done yourself).
- Registration in GIMS: 3-5 thousand rubles. (required for motors > 5 hp).
Owner's feedback:
- 👍 « During the season, saved 20 thousand RUB on fuel. The engine works softer, but with sharp gas there are failures.Stealth 9.9, 2021.
- 👎 « After the gas, it got worse in the cold.Stealth 5, 2019 b.c.).
Before converting to gas, be sure to check the condition of the piston group. If the compression is below 9 kg / cm2, the engine will "dull" the gas even more.
6. Comparison with analogues: Stealth vs Yamaha vs Honda
Main competitors Stealth - Japanese engines Yamaha and HondaLet's compare them by key parameters:
| Parameter | Stealth 9.9 | Yamaha F9.9 | Honda BF10 |
|---|---|---|---|
| Price (2026) | 180-200 thousand rubles. | 280-320 thousand rubles. | 250-290 thousand rubles. |
| Resource | 1000-1500 h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h | 2000-2500 h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h | 1800-2200 hours |
| Fuel consumption | 3.2 to 3.8 l/h | 2.8-3.3 l/h | 2.9-3.5 l/h |
| Repair (complexity) | Simple. | Medium. | Difficult. |
| Guarantee | 2 years | 3 years | 3 years |
When to choose Stealth:
- 💸 Budget is limited (price difference with Yamaha - 100+ thousand rubles.
- 🔧 You plan to repair yourself.
- 🛠️ It requires simple design (no complicated electronics).
When is the best time to take a Japanese:
- 🏆 You need a 2000+ motor-hours resource.
- 🌊 Operation in salt water (y) Yamaha better anti-corrosion protection).
- 🔇 Low noise is important.
Interesting fact: according to the survey on the forum fishing.ru65% of owners Stealth After 3-4 years, they are transferred to Yamaha90% of them admit that stealth He has fully paid for himself during this time.
7. Common Owner Mistakes and How to Avoid Them
Analysis of reviews shows that 70% of breakdowns Stealth These are due to misuse. Top 5 errors:
- Ignoring the breaking inThe first 10 hours of motors must be operated at 50-70% of the power, and the disruption leads to bullies on the piston.
- Savings on oilUsing cheap oil
SAE 30substitute10W-40accelerates engine wear by 1.5 times. - Storage without conservationIf you leave the gasoline in the carburetor for the winter, you'll have to clean the jelly by spring.
- Boat overload. Stealth 9.9 designed for 4 people + cargo 200 kg. Excess leads to overheating.
- Self-adjustment of the carburetorIncorrect setting increases fuel consumption by 30-40%.
After each exit, wash the engine with fresh water (even if the pond seems clean). flushing-clutch Or just water the gearbox from the hose for 5-7 minutes.
What to do if the engine is already sick
- 🔥 OverheatingCheck the thermostat and pump (often clogged with dirt).
- 🔊 Knocking at the gearboxReplace the oil (possibly water) immediately.
- 🛑 It's not starting.Clean the candles and check the compression.
FAQ: Frequent questions about stealth motors
❓ Can I put a 9.9 Stealth motor on a 4.5m boat?
Technically possible, but the engine will run at the power limit. Stealth 9.9 - 3.6-4.2 m For 4.5 m it is better to take Stealth 15 or Yamaha 15.
❓ Which screw is better to put on Stealth 5 for fishing on the current?
For the flow, a screw with a step is recommended 7.5-8" and 3 blades (e.g., Michigan Wheel ApolloIt will give you better acceleration, but the top speed will drop by 5-10%.
❓ How much does a major repair of Stealth 15 cost?
The cost depends on the scope of work:
- Replacement of piston + cylinder grout: 35-45 thousand rubles.
- Repair of the gearbox: 15-20 thousand rubles.
- Full bulkhead (including bearing replacement): 60-80 thousand rubles.
In the services Stealth They often offer discounts on repairs when buying parts from them.
❓ Can I use the Stealth motor in winter?
Yes, but with reservations:
- The air temperature is not lower than -10 ° C (otherwise the oil thickens).
- Be sure to use winter oil
5W-30. - After operation, drain water from the cooling system.
For ice fishing, manual start motors are better suited (for example, Stealth 5).
❓ Where to buy a used Stealth motor without risk?
Sites tested:
- 📌
avito.ruLook for sellers with a good review history. - 📌
drom.ru- there are often laid out engines with a full history of service. - 📌 Groups in VK: "Boats and engines used" (admin checks ads).
Be sure to ask for a video of the engine on idles and under load!