The decision to buy a Yamaha 9 or 9.9 hp outboard motor is often a turning point for the owner of a small PVC boat or aluminum boat, and it is in this class of power that the golden mean lies between mobility and traction, allowing you to confidently get on the water even with two passengers and minimal cargo. Two-stroke and four-stroke Japanese brand units have earned a reputation as a benchmark of reliability, but the choice of a specific modification requires an understanding of the nuances of operation.
Many beginners mistakenly believe that the difference of 0.9 horsepower between models is insignificant, but in practice it affects the ability to plane at full load. If you plan to use a fishing boat alone, you may need a basic version, but for family outings or trolling you will need a margin of power. In this article, we will analyze the technical features, compare the generations of engines and help determine the purchase that will last for decades.
The choice between a new model from the cabin and a proven used version is always a balance between budget and risk. Yamaha It's famous for its maintainability, but the condition of a particular instance can be very different, and it's important to consider not only the price of the unit itself, but also the cost of a set that includes a tank, a lower unit and a screw, since the basic equipment is often cut down.
Key differences of models 9.9 hp from 9 hp
At first glance, it may seem that labeling 9 and 9.9 indicates a marketing ploy designed to confuse the buyer. carburetor The 9.9 hp models have a wider throttle, allowing the engine to breathe more freely and give maximum torque at low revs, which is critical for planing.
Interestingly, many versions of the Yamaha 9 and 9.9 have identical cylinder blocks, often with software constraints or physical plugs in the fuel supply system that experienced mechanics can modify. fuel-system automatically removes the guarantee obligations.
Can I increase the power from 9 to 9.9 hp?
Theoretically, on many Yamaha models, this is possible by replacing the carburetor chicks or removing the valve limiter. However, if you do not have a deep knowledge of the configuration of carburetor engines, there is a high risk of overeating the mixture, which will lead to overheating of the piston group and expensive overhaul.
Owners of heavy boats, such as metal "Kazanki" or inflatable vessels with a hard bottom, are strongly advised to focus on version 9.9. the Additional horsepower in this segment gives a tangible increase in speed and makes it easier to overcome a head wave or strong current.
