Yamaha F115JB Jet 115 HP Outboard Motor ? Specifications
- Engine Type: 4-Stroke, Inline 4-Cylinder
- Horsepower: 115 hp at 5000 rpm
- Displacement: 1.8L (110.3 ci)
- Fuel System: EFI (Electronic Fuel Injection)
- Cooling System: Water-Cooled with Thermostat
- Starter Type: Electric
- Alternator Output: 12 Amps at W.O.T. (Wide Open Throttle)
- Full Throttle RPM Range: 5000 ? 6000 rpm
- Ignition System: Transistorized
- Cylinders: 4
- Cylinder Configuration: Inline
- Bore x Stroke: 3.5 x 3.5 inches (88.0 x 88.0 mm)
- Compression Ratio: 9.7:1
- Jet Propulsion: Yes (Jet Drive for shallow water use and high maneuverability)
- Recommended Fuel: Regular unleaded gasoline (Octane 87)
- Fuel Tank Capacity: Dependent on the boat?s fuel system
- Recommended Engine Oil: Yamalube 4M
- Fuel Filtration: Yamaha 10-Micron Fuel/Water Separating Filter
- Trim and Tilt: Power Trim and Tilt
- Weight: Approximately 370 lbs (168 kg)
- Length: 25-inch shaft (also available in other shaft lengths)
- Dimensions (L x W x H): 35.5 x 23.3 x 25.2 inches (901 x 591 x 640 mm)
- Warranty: 3-Year Limited Warranty
- Applications: shallow water, commercial applications, and recreational boats that require jet propulsion for maneuverability and low draft












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Oakley Gomez (verified owner) –
Absolutely top-notch service from IDMTB. They made buying this motor easy.
Delilah Shelton (verified owner) –
Zero vibration at high speed. A smooth and comfortable ride with this engine.
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Silas Long (verified owner) –
The boat engine runs incredibly smooth. Noticeable difference in fuel efficiency. Great buy!
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The best source for authentic marine engines. IDMTB provides peace of mind.
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A valuable purchase backed by the amazing and quick service from IDMTB.
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Provided direct contact for warranty claims. IDMTB is fully supportive.
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IDMTB’s service is superb! Fast shipping, detailed tracking, and great follow-up.