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Used Yamaha 50 hp 4 stroke motors come in various kinds, including:
Outboard motors
Outboard motors are attached to the outside of the boat and provide propulsion. They are available in various horsepower ratings, just like inboards, and are more accessible and affordable. In addition, they are simpler to maintain and repair. Users can tilt or raise them above the water, which is beneficial in shallow water. They also allow for different engine configurations and are generally more fuel-efficient.
Inboard motors
Inboard motors are mounted within the boat, connected to the propeller shaft. They provide more power and are suitable for larger and heavier boats. They also offer better efficiency and are less affected by wind and waves, which makes them more reliable. Furthermore, inboard motors have a lower center of gravity, which improves stability. Users cannot adjust the height of inboard motors, and they require more maintenance and are more expensive.
IO (Inboard/Outboard) motors
IO motors are installed in the boat's interior and have an outdrive mounted on the boat's exterior. They combine the advantages of inboard and outboard motors. They offer efficiency, power, and versatility. IO motors allow for better maneuverability and are suitable for various water conditions. They also have a tilting mechanism that enables users to raise the motor above the water, which is beneficial in shallow water.
Electric motors
Electric motors are becoming popular for smaller boats and are environmentally friendly. They produce less noise and are low-maintenance. However, they are more expensive and have limited range and power compared to the others.
Regular oil and filter changes
Oil changes should be done every 100 hours of operation or at least once a year, whichever comes first. When changing the oil, a new oil filter should also be installed. The fresh oil and filter help keep the engine lubricated and running smoothly.
Air filter maintenance
The air that goes into the engine needs to be filtered. The air filter should be checked every 100 hours or annually. If it looks dirty, it should be cleaned or replaced. A clean air filter ensures good airflow, which helps with fuel efficiency and engine performance.
Regular spark plug inspection
Spark plugs are what ignite the fuel in the engine. They should be inspected every 200 hours or every two years. Any worn-out spark plugs should be swapped out for new ones. Healthy spark plugs ensure reliable starting and efficient fuel combustion.
Cooling system checks
Used Yamaha 50 hp 4-stroke motors rely on water to keep them cool while running. The coolant level in the reservoir should be checked every 100 hours. The hoses and connections should also be looked at for any leaks or damage. A properly functioning cooling system prevents overheating of the engine.
Fuel system maintenance
The fuel filter should be inspected every 200 hours or every two years, and any dirt or blockages should be cleaned out. The fuel lines should be checked for cracking or leaks as well. A healthy fuel system delivers gasoline to the engine for optimal performance.
Lower unit lubricant inspection
The lubricant in the motor's lower unit, which allows the boat to shift gears and propel through the water, should be inspected every 100 hours. The level should be topped off if necessary. Any water or contaminants in the lubricant should be drained out. Regular maintenance of the lower unit ensures dependable shifting and thrust.
Propeller inspection and maintenance
The condition of the propeller should be checked every 200 hours or every two years. Any dings, dents, or damage should be repaired. The propeller should also be cleaned to remove any build-up. A well-maintained propeller improves fuel efficiency and boating performance.
Electrical system checks
The battery, wiring, and connections should be inspected every 100 hours. The terminals should also be cleaned to prevent corrosion. A healthy electrical system is essential for starting the engine and powering accessories.
Throttle and shift cable adjustments
The cables that control acceleration and gear changes should be examined every 200 hours or every two years. They should be adjusted as needed to ensure smooth throttle response and precise shifting between gears.
When selecting a used Yamaha 50 hp 4-stroke motor, consider the following factors to ensure the choice meets specific needs and expectations:
The purpose of the motor
When choosing a used Yamaha 50 hp 4-stroke motor, the purpose of the motor needs to be considered. This includes factors such as the type of water body (saltwater or freshwater) and the type of boat that will be used in conjunction with the motor.
The condition of the motor
The overall physical condition of the motor should be inspected, including the presence of signs of corrosion, wear and tear, or damage. The motor's running condition should be checked by conducting a water test if possible. This helps to ensure that the motor operates smoothly without any unusual noises or vibrations.
The maintenance history
The maintenance records of the motor should be reviewed to find out if routine maintenance such as oil changes, filter replacements, and valve adjustments have been performed regularly. This helps to ensure that the motor has been maintained properly and reduces the risk of potential problems.
Accessories and additional features
Consider what additional features and accessories may be included with the motor, such as the availability of a power tilt and trim system, an external fuel filter, or a digital tachometer. These accessories and additional features can enhance convenience and performance, making the motor more suitable for specific needs.
The warranty
Some dealers or sellers may offer limited warranties or guarantees on used motors. This allows buyers to have additional protection and peace of mind. If possible, a warranty or guarantee should be selected to reduce the risk of potential motor problems.
Used Yamaha 50 hp 4-stroke motors can be replaced and repaired easily. To replace a Yamaha 50 hp 4-stroke motor, follow the step-by-step guide below.
Safety Precautions
Before any repair or replacement is done, ensure that safety precautions are adhered to. This includes making sure that the motor is not connected to any power source.
Gather Required Tools
Using the right tools makes the replacement process seamless. Some of the tools needed for replacing a Yamaha 50 hp 4-stroke motor include wrenches, screwdrivers, and pliers.
Disconnect the Battery
Before starting any replacement process, ensure that the battery is disconnected. This will help avoid any electrical short circuits.
Drain Fluids
Drain all fluids from the motor that is going to be replaced. These fluids include oil and fuel. Make sure that these fluids are disposed of safely and according to the regulations set by the authorities.
Disconnect Wiring and Throttle Cables
Once the fluids have been drained, the next step is to disconnect all wiring and throttle cables from the motor. Take a picture of how the cables are connected before removing them. This will act as a guide when installing the new motor.
Remove the Old Motor
Once all the above steps have been completed, removing the old motor will be an easy task. Use the right tools to disconnect the motor from the boat.
Install the New Motor
Once the old motor has been removed, the new motor can be installed easily. Follow the steps that were followed when removing the old motor in a reverse manner.
Connect Wiring and Throttle Cables
After the new motor has been installed, the next step is to connect all the wiring and throttle cables. Use the picture that was taken earlier as a guide.
Reconnect the Battery
Once the wiring and throttle cables have been connected, the next step is to reconnect the battery. Double-check all connections to ensure that there are no loose cables.
Fill with Fluids
After the battery has been connected, fill the motor with the required fluids. These fluids include oil and fuel. Make sure that the levels are correct by checking the dipstick.
Perform a Final Checklist
After everything is done, perform a final checklist. This includes checking for any leaks and ensuring that all connections are tight.
Test Run
Once the final checklist has been done, test the motor to make sure that it is running smoothly. Make adjustments where necessary until the motor is running smoothly.
Q: How fast does a Yamaha 50 hp go?
A: There is no straightforward answer to this question. The speed a Yamaha 50 hp motor can achieve depends on several factors, including the type of boat, its weight and design, water and weather conditions, and the motor's condition. However, generally, a used Yamaha 50 hp motor can push a boat to speeds ranging between 20 to 30 mph. The specific speed will vary depending on the factors mentioned above.
Q: How often should the oil be changed on a Yamaha 50 hp outboard?
A: The oil should be changed every 100 hours of use or at least once a year, whichever comes first. However, for heavy or high-speed users, the oil change interval might be more frequent.
Q: Can I upgrade to a Yamaha 50 hp outboard?
A: Yes, users can upgrade their motors to the Yamaha 50 hp outboard. However, the upgrade's feasibility depends on the boat's design and specifications. It is advisable to consult with a technician.
