outboard motor "Bullet M5": a complete guide to selection, configuration and maintenance

outboard motor "M5 Bullet" One of the most popular units among Russian fishermen and owners of small boats, this compact but powerful engine from a domestic manufacturer. "Motovelo" Serpukhov has gained credibility because of the combination of affordable prices, simplicity of design and adaptability to local operating conditions. M5 It does not require expensive maintenance and can be easily repaired even in the field.

But before buying it, it's important to understand what it's really capable of, and it's positioned as a universal solution for PVC boats up to 3.5 meters long, but in practice, it's a water-based system that depends on a lot of factors, from the load of the vessel to the quality of the fuel mix. specificationComparable to competitors (e.g., Windy 8. and Honda BF2.3) and give practical advice on scaling, adjusting the carburetor And we'll focus on the issues of problem solving. legalization - after all, the power of 5 hp requires registration in GIMS, but there are legal ways to circumvent this requirement.

Technical specifications of the engine "Bullet M5": what are the manufacturers hiding?

Official data from "Motovelo" It's a common question for experienced users, like the stated maximum speed of a motorboat. M5 — 20–25 km/hBut in practice, this figure is achieved only under ideal conditions: light boat (up to 200 kg), calm water and a correctly selected propeller. 15–18 km/h.

Key parameters of the motor:

• 🔧 Type of engine: two-stroke, single-cylinder, air-cooled
• 💪 Power: 5 hp (3.68 kW) at 5000–5500 rpm
• ⛽ Engine volume:87 cm3
• ⚙️ gear ratio: 2:1 (18/36 teeth)
• ⚖️ Weight.: 12.5 kg (no fuel)
• 🛢️ Volume of fuel tank: 1.2 L (built-in) + the ability to connect the take-out tank

Feature M5 bullets. — hand-starter It's a lightweight launch system, which is very common in cold weather, but many owners note that after 2-3 years of operation, the starter cable starts to "kneeze," and that's the problem of replacing the cable or lubricating the mechanism. noise: at maximum speeds, the engine produces up to 90 dBThis can scare fish in shallow water.

Comparison with competitors: "Bullet M5" vs "Veterok-8" vs Honda BF2.3

To understand whether to overpay for imported engines, compare M5 The main advantage of the domestic unit is that it's the closest analogue. Price 2-3 times lower at comparable powerLike a new one. Honda BF2.3 It will cost 80-90 thousand rubles, while "M5 Bullet" You can buy it for 25-35 thousand rubles (depending on the configuration), but there is also the flip side: the resource. Honda reach 5,000 motor-hoursooh M5 - no more 1500–2000.

Parameter	"M5 Bullet"	Windy 8.	Honda BF2.3
Power, HP.	5	8	2,3
Weight, kg	12,5	18	12
Fuel consumption, l/h	1,8–2,2	2,5–3	1,2–1,5
Resource, watch.	1500–2000	2000–2500	4000–5000
Price, thousand rubles.	25–35	40–50	80–90

Key conclusions from the comparison:

• 💰 "M5 Bullet" The best choice in terms of price/quality ratio for seasonal use (fishing, hunting).
• 🏆 Windy 8. It's more powerful, but heavier and voracious, suitable for boats 3.5-4 meters long.
• 🌍 Honda BF2.3 Perfect for frequent long hikes due to the economy and reliability, but the price bites.

⚠️ Attention.Motors with a power of 5 hp are subject to registration in GIMS. "Bullet M5" On a boat weighing up to 200 kg and up to 2.5 m in length, it can be registered as a “melting device without an engine” (subject to the removal of the engine during transportation).

The M5 Bullet: Why 90% of Owners Are Doing It Wrong

Running is a critical step, which depends on the life of the engine. 10 motor hours to operate the engine at reduced speeds (not more than 70% of the maximum), however, most owners ignore this rule, which leads to the piston-wear and fuel consumption.

Proper breaking in includes:

The first 2 hours – idling (5-10 minutes) with breaks for cooling |

Next 3 hours - smooth increase in revolutions to 3/4 from maximum |

After 5 hours – check and lift all mounts |

After 10 hours - change the oil in the gearbox (even if it is "eternal")

Typical errors in breaking in:

• ⚡ Long-term work at maximum speeds in the first hours (leads to bullies on the cylinder).
• 🛢️ Use of cheap oil for two-stroke engines (recommended) Mineral or semi-synthetic oil with TC-W3 classification).
• 🌡️ Neglecting breaks for cooling (air cooling motor overheats faster than water).

Adjustment of the carburetor: how to achieve the perfect operation of the motor

Unstable revs, difficult start or black smoke from the exhaust are signs that the carburetor M5 bullets. It needs tuning. It uses a carburetor in the engine. K-60B (or its modifications), which has three main adjusting screws:

• Idle screw (T) - responsible for idling speeds.
• Mixture quality screw (L) regulates the ratio of fuel / air at low and medium speeds.
• Full gas screw (H) - adjusts the mixture at high speeds.

Adjustment procedure:

1. Warm up the engine for 5-10 minutes at idle.
2. Spin the screw. T, achieving stable turnovers (1200-1500 rpm).
3. Tighten the screw. L until the end, then unscrew by 1-1.5 turns.
4. Check the work at full gas: if the engine "sneezes", slightly unscrew the screw H.

⚠️ Attention.: If after adjustment the engine continues to stall when the throttle is opened sharply, the problem may be in the cockpit or lamb-shapedIn this case, you need to disassemble and clean.

How to check the membrane of the carburetor?

Remove the carburetor cover and inspect the membrane for cracks or deformations. If it has lost elasticity (does not return to its original position when pressed), a replacement is required. the original membrane for the K-60V costs ~200 rubles, but you can use analogues from carburetors. Walbro or Zama (calculate by diameter).

Typical malfunctions and ways to eliminate them

Even with careful operation "M5 Bullet" Let's look at the most common problems and their solutions.

A symptom.	Possible cause	Decision
The engine won't start.	No spark, clogged carburetor, old fuel	Check the candle, clean the carburetor, drain the old fuel
Unstable turnovers	Chickle clogged, worn-out carburettor membrane	Blow the carburetor with compressed air, replace the membrane
Overheating of the engine	Clogged chill ribs, little oil in fuel	Clean the ribs, check the proportion of the oil (1:50)
Weak traction	Worn screw, knocked down phases of gas distribution	Replace the screw in steps of 7-9 inches, adjust the valves

The problem of the problem of electricIf the engine doesn't give off a spark, check:

• 🔌 High-voltage wire condition (often rubbed against the body).
• 💡 The gap on the candle (should be) 0.6-0.7 mm).
• 🔋 Ignition coil (call the tester: primary resistance - 0.3-0.5 Ohms, secondary - 2-4 kΩ).

Legal nuances: do I need to register the “M5 Bullet” in the GIMS?

According to the order of the Ministry of Emergency Situations No. 447 of 2020, all engines with power from the 5 hp However, there are legal ways to avoid bureaucracy:

• 📄 Designing a boat like "melting without engine" (if it is up to 2.5 m long and weighs up to 200 kg) In this case, the motor must be removed during transportation.
• 🔄 Use the engine with power up to 3.68 kW (5 hp) boats not intended for navigation on inland waterways (for example, on lakes without navigation).
• 🚣 Buy a motor with certificate of conformity ooh M5 bullets. It is available), which makes the registration process easier.

If you decide to register the engine, you will need:

1. Passport for motor and boat.
2. Receipt of payment of the state duty (2000 rubles).
3. Application to GIMS with indication of the place of operation.

⚠️ Attention.The penalty for the operation of an unregistered engine with a capacity of 5 hp is 1000-1500 rubles 11.8.1 of the Administrative Code of the Russian Federation: If the engine is confiscated again, it is possible to confiscate the engine.

Tuning and upgrade: how to improve the “Bullet M5” without losing reliability

Standard equipment M5 bullets. It leaves room for upgrades, and here are the safe ways to increase power or comfort:

• 🔧 Rotor replacement: Standard screw with a pitch of 7 inches can be changed to 9-inch to increase thrust (relevant for heavy boats) or on 5-inch for speed (in light boats).
• ⛽ Installation of the take-away tank: The 1.2 liter tank is built-in and only provides 30-40 minutes of operation, and the 5-10 liter remote tank solves the problem of autonomy.
• 🔊 Noise-mufflerHomemade stainless pipe muffler will reduce noise by 10-15 dB (but don’t forget the law: a change in design requires re-registration).
• 🔋 Electronic ignitionReplacement of normal ignition with contactless (for example, from "Neptune.") will improve cold-weather launch.

Dangerous modifications that reduce the life of the engine:

• ❌ Blowing the cylinder (leads to overheating and bullying).
• ❌ Installation of turbine or supercharger (design is not designed for high pressure).
• ❌ Use of fuel with an octane number above 92 (causes detonation).

FAQ: answers to frequent questions about the M5 bullet

Can I use 95th gasoline instead of 92th?

Technically possible, but not recommended. The octane number 95 is higher than that required for this motor (optimally 92), which can lead to a high octane level. combustion-chamber If there's no other gasoline, add it to the tank. high-additive (for example, Motomix or Liqui Moly).

Which screw is better for trolling?

For trolling (slow movement) a screw with large step (9–11 inches) and small-diameterOptimal models:

• Michigan Wheel Apollo (9×7)
• Solas Amita (10×6)
• domestic Neptune. (step 9 inches)

Important: after replacing the screw, check the maximum engine speeds - they should not exceed 5,500 rpm.

How much oil should I pour into the gearbox?

Volume of oil in the gearbox M5 bullets. — 150 mlUse transmission oil. GL-4 or GL-5 viscosity 80W-90You need to change the oil.

• After the first 10 hours (shoot).
• Every 50 hours or once a season.

To replace:

1. Pour the old oil through the bottom stopper.
2. Wash the gearbox with kerosene (pour 100 ml, spin the shaft, drain).
3. Pour the new oil to the level of the control hole.

Can I keep my motor on the balcony in winter?

You can, but with the rules:

• Pour all the fuel out of the tank and carburetor (gasoline decomposes and forms resins).
• Lubricate the cylinder, pouring 5-10 ml of oil through the candle hole and turning the crankshaft.
• Handle metal parts preservative (for example, WD-40).
• Keep the engine in verticality (down) to avoid leaking oil.

Ideal storage temperature: 0…+10°CAvoid sub-zero temperatures - rubber seals may crack.

What to do if the motor hits the water?

If the engine is drowned or flooded with a wave:

1. Immediately drain the water from the cylinder, twisting the candle and turning the crankshaft.
2. Rinse the carburetor and fuel system alcohol-lubrication (The water in gasoline causes corrosion).
3. Lubricate all moving parts (bearings, starter cable).
4. Dry the engine for 24 hours in a warm room (can be used) hair dryer at minimum capacity).

⚠️ Do not start the engine until you make sure that the cylinder is not water - this will lead to a high risk of water. hydrostrike And the rod breaks!