That set up indicates a lot less mass in the cylinder head and decreased fat for the general outboard. Concurrently, 4 valves per cylinder indicates good motor combustion, which contributes to horsepower, torque and gasoline efficiency. Fast Acceleration Subscribe for getting all the most up-to-date Yamaha products information, promotions, stories https://onboardengine.shop/product-category/150-outboard-for-sale/