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The core advantages of small four-stroke gasoline outboard motors lie in their outstanding fuel economy, extremely low emissions and noise levels, smooth and comfortable operation, as well as the convenience of use without the need for pre-mixed fuel and oil. Although their initial purchase cost may be slightly higher than that of two-stroke models with the same horsepower, and they are a bit heavier, their long-term operating costs (for fuel and engine oil) are lower. Additionally, they are more environmentally friendly, quieter, more comfortable, highly reliable, and have a longer service life. These features make them an ideal choice for small boat owners who pursue economy, environmental friendliness, comfort, and ease of use, especially suitable for leisure fishing, family outings, and waters with high environmental protection requirements. The weight disadvantage of modern small four-stroke outboard motors has been significantly reduced, while their advantages are remarkably prominent.
Outboard Motor Model |
JP9.0 |
Displacement (ml) |
225 |
Bore × Stroke (mm) |
72×55 |
Compression Ratio |
8.7:1 |
Maximum Power (kw/r/min) |
>4.5/3600 |
Maximum Torque (Nm/r/min) |
13/2600 |
Minimum Fuel Consumption (G/KW.H) |
>395 |
Fuel Tank Capacity (L) |
1.3 |
Lubricating Oil Capacity (L) |
0.6 |
Spark Plug Gap (mm) |
0.6-0.8 |
Ignition System |
Transistorized Contactless Electronic Ignition (TCI) |
Propeller Configuration |
2-Blade Anti-Fouling |
Mounting Height |
40-70 (from mounting point to propeller) |
Transmission Mode |
Solid Shaft, Splined Shaft Drive |
Installation Method |
Fixed Support Frame with Clamping Bracket |
Steering Method |
180° Rotating Mechanism |
Starting Method |
Pull-Start |
Net/Gross Weight (kg) |
26/29 |
Package Dimensions |
115×45×34 |
1、Four-Stroke Operating Cycle: Follows four independent strokes—intake, compression, power, and exhaust—to complete one working cycle, sharing the same principle as automobile engines.
2、Independent Lubrication System: Equipped with a dedicated oil tank and oil pump, it uses pure gasoline (no pre-mixed oil required). The oil circulates to lubricate the moving parts inside the engine.
3、Valve Mechanism: Utilizes intake and exhaust valves to control the inflow and outflow of gases, typically featuring an overhead camshaft (OHC) design.
4、Relatively Complex Structure: Compared to two-stroke models, it incorporates additional components such as a valve mechanism and an independent lubrication system (including an oil pan, oil pump, and filter), resulting in an overall more sophisticated structure.
5、Relatively Heavier Weight: Due to its more complex structure, it is usually slightly heavier than two-stroke models of the same horsepower. However, modern design advancements have significantly narrowed this gap, especially in the small-horsepower range.
6、Stable and Quiet Operation: Its inherent working cycle and design result in significantly lower vibration and noise levels compared to two-stroke engines.
7、High Fuel Efficiency: Enables more complete combustion and higher thermal energy utilization.
Mobile No.:18954089767
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