outboard motor Yamaha 5 hp It is one of the most popular choices for small-sized PVC boats and aluminum vessels, and its compact size, efficiency and reliability make it the perfect solution for fishing, river walks or small trips. But how can you not make the mistake of choosing among several modifications?

In this article, we will discuss specification all relevant models Yamaha 5 horsepower, compare them with competitors (for example, the Honda BF5 or Mercury 5M) and provide practical recommendations on operation, maintenance and tuningWe will focus on nuances that are rarely mentioned in standard reviews - for example, how the engine will behave on the wave or when working long at low speeds.

Technical specifications of the Yamaha 5 hp engines: a comparative table

Lineage Yamaha The 5 hp model comes in several different launch types, weights and options, with up-to-date 2026 data for the most popular models:

Model Type of launch Weight, kg Engine capacity, cm3 Max. RPM, RPM Fuel tank (built-in/removable) Recommended transmission
Yamaha F5BMHS Manual + electric starter 27 123 5000–5500 - 12 l L (long leg)
Yamaha F5BMH manually 25 123 5000–5500 - 12 l S (short leg)/L
Yamaha F5AMH manually 24 123 5000–5500 Built-in 1.1 l/12 l S / L
Yamaha F5CMHS Manual + electric starter 28 123 5000–5500 - 12 l L (with increased gearbox)

Note: Models with index M in the title (e.g., F5BMH) equipped multiposition trimmerIt's a little bit easier to steer a boat on the wave. C (for example, F5CMHS) have a reinforced transmission for use in salt water or under high loads.

All engines in the series F5 comply with environmental standards EU RCD 2 and EPA 2006The average fuel consumption at cruising speed (3/4 gas) is 1.2–1.5 l/h This is 15-20% more economical than analogues from Mercury or Toatsu.

📊 What type of engine start is more convenient for you?
Manual starter
Electrical starter
Never mind, reliability is the key.
Not yet.

Advantages and disadvantages of Yamaha 5 hp: an honest review

Motors. Yamaha They have long established themselves as some of the most reliable in their class, but they also have weaknesses.

  • ✅ ReliabilityJapanese assembly and quality materials (e.g. aluminum alloy) YDC-30 for the gearbox body) guarantee the service life 10-15 years with the right treatment.
  • ✅ Quiet work.: noise level at idle speeds - everything 58-62 dB (for comparison, y) Mercury 5M — 65-68 dB).
  • ✅ EconomyFuel consumption is 10-15% lower than that of competitors due to the system CDI (digital ignition).
  • ✅ Management convenience: ergonomic handle of gas with smooth running and the possibility of installing remote control (optional for models with a M in the title.

However, there are also disadvantages that dealers often do not mention:

  • ❌ Price.: engines Yamaha 20-30% more expensive than analogues from Honda or Tohatsu. For example, F5BMHS It costs about 180 000 rubles, while Honda BF5 — ~ 150,000 RUB.
  • ❌ Weight.: electric starter models (F5CMHS) weigh up to 28 kg, which may be inconvenient to carry alone.
  • ❌ Difficulty of self-repairOriginal parts are expensive, and some parts (such as the ignition unit) require specialized diagnostic equipment.
  • ❌ Fuel sensitivity: when using gasoline with an octane number lower AI-92 possible detonation and accelerated wear of the piston group.
⚠️ Attention.Motors Yamaha 5 hp They are not designed for long-term operation at maximum speeds (more than 1 hour in a row), this can lead to overheating of the cylinder head and deformation of the gaskets. Optimal mode is 75-85% of the maximum power.

Which Yamaha 5 hp engine to choose: manual or electric starter?

The choice between a manual starter and an electric starter depends on your priorities: convenience, weight or budget.

Manual starter (models) F5BMH, F5AMH):

  • ✅ Lighter by 2-3 kg (important for PVC boats with low weight).
  • ✅ Easy to maintain (no battery or electrical wiring).
  • ✅ Cheaper by 15-20 thousand RUB.

Suitable for fishermen who appreciate minimalism and do not want to mess with the battery, however, in cold weather (below +5 ° C), starting can require several jerks.

Electric starter (models) F5BMHS, F5CMHS):

  • ✅ Starting from a button (convenient at frequent stops, for example, when trolling).
  • ✅ Possibility of installation of additional equipment (echo sounder, navigator) through 12V-connector.
  • ✅ Less physical effort (relevant for older users or for arthritis of the hands).

Cons: more weight, the need to buy a battery (recommended - 12V 9Ah) and its periodic recharging.

Check battery compatibility (must be gel or AGM)

Make sure there is room in the boat for the battery installation

Purchase a charger with desulfation function

Check the length of the cables (the standard 1.5 m are included)

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If you often go out on the water alone and appreciate simplicity, take a model with a manual starter. For family walks or trolling, it is better to overpay for an electric starter - it will pay off in comfort.

Yamaha 5 hp comparison with competitors: Honda, Mercury, Tohatsu

To understand how Yamaha ahead or inferior to competitors, compare key parameters with popular analogues:

Parameter Yamaha F5BMHS Honda BF5 Mercury 5M Tohatsu MFS5
Weight, kg 27 26 25 24
Fuel consumption, l/h 1.2–1.5 1.4–1.7 1.5–1.8 1.3–1.6
Noise level, dB 58–62 60–64 65–68 61–65
Guarantee, years. 3 3 2 3
Price, rub (2026) 180 000 150 000 140 000 135 000

Yamaha wins PO:

  • ✔ Economical (by 10-15% lower fuel consumption).
  • ✔ Quietness of work (3-5 dB quieter) Mercury).
  • ✔ Transmission reliability (reducer with reinforced gears).

Competitors are better PO:

  • ✔ Price (Tohatsu and Mercury 20 to 25 percent cheaper.
  • ✔ Weight.Mercury 5M 2kg lighter.
  • ✔ Availability of spare parts (Honda It is easier to find in the regions.

💡

If you choose between Yamaha F5BMHS and Honda BF5And look at the water you're going to swim in. Yamaha (Increased corrosion treatment), for freshwater rivers, Honda (easier to maintain).

Features of operation: how to prolong the life of the motor

Even the most reliable motor requires proper maintenance. Yamaha 5 hpwho will extend their service life:

  1. break-in: the first 10 hours of motorized operation avoid working at full power (maximum 3/4 gas).
  2. Fuel.: use the petrol AI-92 or AI-95 with an octane number not lower than 92. Filling with 80th gasoline cancels the warranty and leads to detonation.
  3. Oil: for two-stroke models (F5AMH) mix the petrol with the oil Yamalube 2M proportionally 50:1For four-stroke (F5BMHS- pour in 10W-30 or 10W-40 (synthetics)
  4. WashingAfter each exit into salt water, wash the engine with fresh water through the flush-port (washing hole) for 5-7 minutes.

Pay special attention winter-conservation:

  • 🔧 Plug all fuel out of the carburetor (to avoid deposits).
  • 🛢️ Replace the oil in the gearbox (use it) Yamalube Gear Oil).
  • ❄️ Treat with an anti-corrosion spray (CRC Marine) all metal parts.
  • 🔋 Remove the battery (if any) and store it in a warm room with periodic recharging.

⚠️ Attention.: Never keep the motor upright (actinic down) for more than 2 weeks - this leads to leakage of oil from the gearbox and its premature wear.
What if the engine doesn’t start after winter?

1. Check the spark plug -- often it's filled with fuel. Dry or replace.

2. Make sure that there is no condensation in the carburetor (can be blown with compressed air).

3. Check the fuel hose for cracks - rubber blubbers over time.

4. If the motor is electric starter, check the battery charge (must be at least 12.4V).

Tuning and accessories: how to improve the Yamaha 5 hp

The standard performance of the engine can be improved with tuning or additional accessories.

  • 🔧 Vint: Replacement of the standard screw by 3-blade with steps of 7-9 inches (for example, Michigan Wheel Apollo) increases thrust by 10-15%, suitable for heavy boats or trolling.
  • 🔋 Lithium-ion battery: Replacement of standard lead acid with LiFePO4 12V 10Ah (for example, GreenCell) reduces weight by 3-4 kg and increases service life by 2-3 times.
  • 📡 Remote controlfor models with M In the name you can install a cable or electronic remote (for example, Yamaha Remote Control Kit).
  • 🛡️ Anti-corrosion coating: shelling Zinc Spray or CRC Marine Grease It protects against rust in salt water.

Beware of doubtful tuning:

  • ❌ Spreading the cylinder to increase power leads to overheating and reduces the engine life by 2-3 times.
  • ❌ Installation of non-original carburetors (e.g. from Mikuni) may disturb the balance of the fuel mixture.
  • ❌ Homemade silencers This often causes water to enter the cylinder.

💡

Best tuning for Yamaha 5 hp This is a rotor replacement and a lithium-ion battery, and these improvements maximize efficiency with minimal engine risk.

Frequent malfunctions and ways to eliminate them

Even when properly operated, there can be problems over time, and let's look at the most common problems and their solutions:

A symptom. Possible cause Elimination
The engine is dead at idle speeds Clogging of idle jeckler in a carburetor Blow with compressed air or wash in carbcliner
Loss of power, "sneezing" Ignition plug wear or incorrect gap Replace the candle (NGK BPR6ES), expose the gap 0.7-0.8 mm
Overheating (thermostat triggers) Clogging of water channels or breakage of pump Rinse the cooling system, replace the impeller pump
High-speed vibration Screw or wear of the lower unit bearing Check the balance of the screw, replace the bearing

If the engine does not start after winter, 80% of the problems are:

  1. Contaminated carburetor (especially if you have not drained fuel).
  2. Discharged battery (for models with electric starter).
  3. Oxidated contacts (check the ignition wires).

⚠️ Attention.: If after replacing the candle or washing the carburetor the problem has not disappeared, do not try to adjust the idling speed yourself - this can lead to re-enrichment of the mixture and cylinder bay.

FAQ: Answers to Frequent Questions About Yamaha 5 HP

Can I install a Yamaha 5 hp engine on a PVC inflatable boat?

Yes, but two things must be considered:

  1. Motor weight: for boats up to 3.2 m suitable any model, for boats 3.6 m and more it is better to choose a lightweight version F5AMH (24 kg).
  2. Transmission: for PVC boats with a hinged transcent height of 380 mm, a short leg is suitable (S), for a transom of 500 mm, long (L).

Also check the maximum allowable power of the engine for your boat (indicated in the passport of the PVC boat).

Which screw is better to choose for trolling?

It's optimal for trolling. 3-blade screw with a pitch of 7-8 inches It's 9 to 10 inches in diameter.

  • Michigan Wheel Apollo (Aluminum, Step 7) is a budget option.
  • Yamaha Relia (Steel, Step 8) is the best choice for heavy boats.
  • Solas Amita (composite, step 7.5) is quiet and economical.

Avoid 4-blade screws – they create excess resistance at low speeds.

How much oil to use into the Yamaha 5 hp gearbox?

The volume of oil in the gearbox for all models Yamaha 5 hp — 200 mlRecommended oil:

  • Original: Yamalube Gear Oil (SAE 90).
  • Analogues: Motul Gear 300 or LIQUI MOLY Marine Gear Oil.
It's important.The oil is changed every 100 hours or once a season (even if the engine is not used enough).

Can I use the Yamaha 5 hp engine in salt water?

Yes, but with mandatory precautions:

  1. After each exit, wash the engine with fresh water through the flush-port at least 10 minutes.
  2. Apply anti-corrosion lubricant (CRC Marine Grease) all metal parts.
  3. Check the anode every 50 hours (if any) and replace it if necessary.

For salt water, it is better to choose a model with an index C in the title (e.g., F5CMHS) - it has enhanced corrosion protection.

What battery is suitable for an electric starter motor?

Recommended battery parameters:

  • Voltage: 12V.
  • Capacity: 9–12 Ah (optimally) 10Ah).
  • Type: gel or AGM (e.g., gel) Delta DT1210 or Varta Marine).
It's important.: do not use conventional lead-acid batteries - they are afraid of vibrations and can leak. Yamaha The plus terminal on the right.