boat motor Nissan Marine 9.8 is a compact but powerful solution for owners of inflatable and small boats who value the reliability of the Japanese brand and the optimal price-quality ratio. Model with working volume 244 cm³ and power 9.8 hp has become one of the most popular in the line Nissan Marine due to its versatility: it is suitable both for fishing on a quiet river and for active recreation on a lake with a wave of up to 0.5 meters. But why exactly this model, and not analogues from Yamaha or Honda? What are its key advantages and pitfalls? Let's figure it out.

In this article you will find not only dry technical specifications, but also practical advice on selection, operation and maintenance Nissan Marine 9.8. We analyzed reviews from owners, compared the model with competitors and identified critical nuances that dealers are silent about - for example, why a motor can “lose” power after 200 operating hours and how to avoid this. If you are faced with a choice between the 2-stroke and 4-stroke version of this model, you will also find clear arguments here.

Specifications Nissan Marine 9.8: what is hidden behind the numbers

On paper, the motor looks standard for its class: single cylinder engine with air cooling, manual starter and the ability to install electric start (optional). But the devil is in the details. For example, Nissan Marine 9.8 equipped with a system CDI (Capacitor Discharge Ignition), which ensures stable ignition even at low temperatures - this is critical for northern regions. But the weight of the motor - 26 kg - may come as a surprise to those who are accustomed to lighter Chinese analogues.

Let's look at the key parameters in comparison with our closest competitors:

Parameter Nissan Marine 9.8 Yamaha F9.9 Honda BF10
Engine type 1-cylinder, 2-stroke/4-stroke 2-cylinder, 4-stroke 1-cylinder, 4-stroke
Max. power (hp) 9.8 9.9 9.9
Working volume (cm³) 244 212 223
Weight (kg) 26 (2T) / 38 (4T) 37 41
Fuel tank (l) 12 (external) 12 12

Please note the weight difference: 2-stroke version Nissan easier Honda BF10 by whole 15 kg! This is important if you often carry the motor by hand. However, the 4-stroke version weighs the same as competitors, but wins in efficiency — its fuel consumption is 20-25% lower than that of its 2-stroke counterpart.

⚠️ Attention: The technical data sheet of the motor indicates the maximum angle of inclination of the transom 15°, but in practice when exceeding 10° Possibly air leaking into the fuel system. This leads to unstable operation at high speeds.

2 stroke vs 4 stroke Nissan Marine 9.8: what to choose

This is an eternal question that plagues buyers. Let's figure out which option is right for you.

2 stroke motor 20-30% cheaper, easier to maintain and 10-12 kg lighter. It is ideal for short fishing trips or calm water excursions where long periods of idling are not required. However, it has three critical disadvantages:

  • 🔥 Increased fuel consumption - up to 5.5 l/h at maximum speed (vs. 3.8 l/h for 4-stroke).
  • 🌍 Environmental friendliness: CO₂ emissions are 2-3 times higher, which can be a problem in protected areas.
  • 🛠️ Resource: with intensive use requires major repairs after 1500-2000 operating hours.

4 stroke motor more expensive, heavier, but quieter and more economical. It is worth choosing if:

  • 🚤 You are planning long hikes (more than 4 hours of continuous work).
  • 🎣 Catch fish by trolling - the motor consistently keeps low speeds without overheating.
  • 💰 Are you ready to spend money on maintenance: oil change every 50 operating hours (against 100 for 2-stroke).
📊 What type of motor do you prefer?
  • 2-stroke (cheaper and lighter)
  • 4-stroke (quieter and more economical)
  • I haven't decided yet
  • I use an electric motor

Comparison with analogues: why Nissan Marine 9.8 wins (or loses)

On the market of motors with a power of 9.8-9.9 hp. Three brands are leading: Nissan, Yamaha And Honda. Let's see where Nissan Marine 9.8 turns out to be a winner and where it is inferior to competitors.

Benefits Nissan:

  • 💰 Price: 10-15% cheaper Honda BF10 with similar characteristics.
  • 🔧 Maintainability: spare parts are cheaper than Yamaha, and the design is simpler (for example, access to the spark plug does not require disassembling the housing).
  • 🌡️ Thermostat: The 4-stroke version has a thermostat with 160°C, which reduces the risk of overheating when trolling.

Disadvantages:

  • 🔊 Noisiness: 2-stroke version is 5-7 dB louder Honda BF10 (noise level 92 dB against 85 dB).
  • ⚙️ Gearbox: y Yamaha F9.9 gear ratio 2.08:1, which gives better overclocking, whereas Nissan — 2.07:1.
  • 🛒 Dealer network: service centers in Russian regions Nissan Marine less than that Yamaha.
💡

If you choose between Nissan Marine 9.8 And Tohatsu MFS9.8, pay attention to the gearbox: Nissan It is made of aluminum alloy with the addition of magnesium, which increases corrosion resistance by 30%.

Run-in and first maintenance: how to extend the life of the engine

First 10 engine hours - a critical period for any outboard motor. Improper running-in can reduce engine life by 40%. Here's what to do:

Do not exceed 3/4 gas in the first 2 hours of operation|

Use fuel with an octane rating of at least 92|

Alternate modes: 5 minutes at idle, 10 minutes at medium speed |

After break-in, change the oil (for 4-stroke version) -->

After running in it is necessary to carry out first maintenance (MOT). For a 2-stroke engine this is:

  • 🔧 Check and adjust if necessary valve clearances (norm: 0.10-0.15 mm).
  • 🛢️ Replace the fuel filter (even if it looks clean).
  • 🔥 Check the condition of the spark plug - the soot should be light brown.

For the 4-stroke version an oil change is added. The important thing here is to use semi-synthetic oil 10W-30 (For example, Nissan Marine 4-Stroke Oil or Motul Outboard Tech 10W-30). Synthetics are not recommended - they can cause leaks through the seals.

⚠️ Attention: If, after running in, the engine begins to “sneeze” when you sharply press the gas, this is a sign lean fuel mixture. It is necessary to adjust the carburetor (the mixture quality screw) or check the tightness of the fuel hoses.

Typical faults and solutions

Even the most reliable motor fails over time. Here TOP-5 problemsproblems that owners face Nissan Marine 9.8, and how to solve them:

Problem Reason Solution
The engine stalls at high speeds The fuel filter or carburetor air jet is clogged Clean the filter, blow out the carburetor with compressed air
Vibration at idle Crankshaft bearing wear or propeller imbalance Replace bearing or balance screw
Overheating (alarm sounds) The cooling system is clogged or the oil level is low (for 4T) Clean the water pump and add oil
Weak acceleration Worn gearbox or incorrect propeller pitch Check the oil in the gearbox, select a pitch screw 9-11 inches
The engine won't start The spark plug is faulty or the battery is dead (for models with electric start) Replace spark plug (NGK BPR6ES), charge the battery

If the motor does not develop full power, check:

  1. Condition air filter (clogging reduces power by 15-20%).
  2. Compression in the cylinder (standard: 8-10 kg/cm²).
  3. Integrity fuel pump membranes (when ruptured, the engine “chokes” at high speeds).
What to do if the engine starts and immediately stalls?

This problem is most often associated with idle system. Check:

1. Adjust the idle speed screw on the carburetor (standard: 850-950 rpm).

2. Condition carburetor needles - if it is dirty, fuel does not flow in sufficient quantities.

3. Sealing fuel hoses - even a microcrack leads to air leaks.

If the problem persists, a complete carburetor cleaning with flushing of the channels is required.

Important: Do not use metal brushes to clean the jets - they scratch the surface and interfere with flow!

Propeller selection: how to increase speed or thrust

Standard screw included with Nissan Marine 9.8, is 3-blade aluminum in increments 9 inches. It is universal, but not ideal for all conditions. Let's figure out how to choose a screw for your tasks:

To increase speed:

  • 🚀 Select the screw with big step (10-11 inches). For example, Solas Amita 3x10x11.
  • 🔄 Reduce screw diameter by 1 inch (from 9.25" to 8.25") - this will reduce water resistance.

To improve traction (trolling, towing):

  • 🎣 Install the screw with smaller steps (7-8 inches) and 4 blades.
  • 🛟️ Use screws from stainless steel (For example, Michigan Wheel Apollo) - they are thinner and more efficient than aluminum ones.

Remember: changing the propeller pitch to 1 inch changes the maximum engine speed to 150-200 rpm. If after replacing the screw the motor does not reach full speed (5000-5500 rpm for 2-stroke), it means the pitch is too large.

💡

Optimal screw for Nissan Marine 9.8 for a PVC boat 3.2 m long - this is 3x9.25x9 (aluminum) or 3x10x10 (stainless steel). It provides a balance between speed (up to 30 km/h) and thrust for gliding with 1-2 people on board.

Operating tips: how to save fuel and avoid breakdowns

A boat motor is not only about power, but also efficiency. Here are some proven ways to reduce fuel consumption by 10-15%:

  • ⛽ Use 92 octane fuel — 95 gasoline does not provide an increase in power, but it costs more.
  • 📉 Keep your revs in range 3000-4000 rpm - This is the optimal mode for saving fuel.
  • 🧴 For a 2-stroke engine, use oil Nissan Marine 2T or Motul Outboard 2T in proportion 1:50.
  • 🚤 Reduce the weight of the boat: every extra one 10 kg increases consumption by 1-1.5 l/h.

To avoid costly breakdowns:

  • 💦 Wash the engine after every trip fresh water (especially if you drove through salt water).
  • 🔌 Before winter storage, drain the fuel from the carburetor or add a stabilizer (for example, STA-BIL).
  • 🛠️ Every 100 hours check the condition anti-corrosion anodes on the gearbox.
⚠️ Attention: Never store the engine in a horizontal position (lying on its side) - this will cause oil to enter the cylinder through the ventilation ducts and piston jamming at next startup.

FAQ: answers to frequently asked questions about Nissan Marine 9.8

Is it possible to install Nissan Marine 9.8 for a boat with a 380 mm transom?

Yes, but it will be required transom extension (for example, from Hydroforce or Flinc). The standard transom height for this motor is 381 mm (15"), so a difference of 1 mm is not critical. However, when installed on a transom 380 mm The propeller will be immersed deeper, which will increase water resistance by 5-7%.

What is the resource of 2-stroke and 4-stroke Nissan Marine 9.8?

When used correctly:

  • 2 stroke: 2000-2500 operating hours before major repairs.
  • 4 stroke: 3000-3500 operating hours (with regular oil changes).

The resource can be increased by 20-30% if:

  • Use synthetic oil (for 4T) or semi-synthetics (for 2T).
  • Avoid working for long periods of time maximum speed (above 5000 rpm).

What kind of oil to pour into the gearbox Nissan Marine 9.8?

Suitable for gearbox gear oil GL-5 with viscosity 80W-90. Optimal options:

  • Nissan Marine Gear Oil (original).
  • Liqui Moly Hypoid-Getriebeoil TDL 80W-90.
  • Castrol Syntrax Universal Plus 75W-90 (synthetics, increases gearbox life by 15%).

Oil volume in the gearbox - 220 ml. Replace every 100 hours or once a season.

Is it possible to convert manual start to electric start?

Yes, but it will require:

  • Purchasing an electric start kit (item number Nissan 68300-99900 for 2T or 68300-99901 for 4T).
  • Battery settings 12V 18Ah (For example, Delta DT 1218).
  • Connections of the starter relay and wiring (the diagram is in the instructions for the kit).

The cost of refurbishment is approx. 15-20 thousand rubles. (including work). Please note: after installing electric start, the weight of the motor will increase by 3-4 kg.

Which propeller is best for trolling? Nissan Marine 9.8?

Optimal for trolling 4-blade propeller in increments 7-8 inches. Recommended models:

  • Michigan Wheel Apollo 4x8x10 (stainless steel, improved traction at low speeds).
  • Turning Point Hustler 4x8x10 (aluminum, budget option).
  • Solas Rubex 4x7x10 (compromise between price and quality).

When trolling, the engine speed should be in the range 1000-1500 rpm. If the propeller is chosen correctly, the boat will move at a speed 3-5 km/h without jerking.