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In-line Engine Models F150/F115
The versatile, easy to use outboards F150 and F115 with in-line four stroke engines
Both the in-line 4-cylinder F150A/F150B and F115A models deliver high performance in a lightweight and compact package. These are multi-functional outboards with excellent fuel economy and great versatility.
Main Features
Power & Performance
16-valve double overhead cam
The cylinder head features four valves per cylinder, which makes 16 valves in total. Smaller valves weigh less and allow high-speed operation. They supply more air and allow smooth exchange of intake fuel and exhaust gas for more power.
4-1 exhaust system F150A/F150B
The 4-1 exhaust system increases exhaust efficiency to enhance power.
Long intake manifold
The long intake manifold fitted with a resonator helps provide the optimum amount of air to the combustion chambers, thus enabling the engine to produce maximum mid-range torque.
Reliability & Durability
Water draining air intake duct
This minimizes the fuel vapor generated by engine heat and facilitates smooth restarting.
Multi-point fuel injection
A new knock sensor is added to the ECM (Engine Control Module) controlled electronic fuel injection system. This provides a reliable anti-knocking function to supplement the multi-point injection system’s great combustion efficiency, strong performance, excellent fuel consumption and quick start-ups.
Comfort & Economy
Twin balance shafts F150A
Engine vibration is minimized by the twin balance shaft engaged with the crankshaft and the damper fitted to the flywheel. Best tuned mount system reduces boat vibration transmitted from the engine.
Labyrinth exhaust system
The labyrinth exhaust system and water sealed outer wall suppress exhaust noise.
The lineups of outboard models offered differ by country or area. Product names, coloring and graphics may also differ. The specifications of outboards shown on this website may be changed or production discontinued without notice.
Always read your owner’s manual before using the outboard and be sure to use it properly.
Direct inquiries concerning Yamaha outboards to your country’s distributor or local dealership.
