fits make: Yamaha. year: 1972–2025.

( Manufacturer Part Number: 298-11635-60 ), ( Part Type: Piston )
The 298-11635-60 is a vintage 1972 Yamaha U7E 25 piston outboard motor. This motor is a classic piece of marine engineering, designed with reliability and performance in mind.
The U7E features a 25 horsepower, two-stroke, air-cooled engine. The two-stroke design means that fuel and oil are mixed before entering the engine, resulting in a simpler and lighter motor. The air-cooled system allows the motor to run without the need for a radiator, making it ideal for use in a variety of boating environments.
The U7E has a displacement of 630cc and a bore and stroke of 76mm x 60mm. This combination of power and size makes it a versatile motor, capable of powering a range of small to medium-sized boats. The engine is equipped with a single-cylinder, overhead valve design, which allows for efficient combustion and smooth operation.
The U7E features a manual start system, with a pull-start rope and a choke for easy starting in cold weather. It also has a manual fuel pump, which draws fuel from the tank and delivers it to the engine. The motor is equipped with a manual throttle and shift control, allowing the operator to adjust the speed and direction of the boat.
The U7E has a gear ratio of 2.48:1, which provides a good balance of power and fuel efficiency. It also has a wet sump oil system, which collects oil from the engine and returns it to the crankcase for reuse.
The U7E has a weight of 115 lbs (52 kg), making it easy to transport and install. It has a shaft length of 15 inches, which is suitable for a variety of boat types and hull designs. The motor is also equipped with a gear case, which protects the lower unit from damage and provides a smooth and quiet operation.
Overall, the 298-11635-60 1972 Yamaha U7E 25 piston is a classic outboard motor that offers reliable power and performance for small to medium-sized boats. Its two-stroke, air-cooled design makes it easy to maintain and service, and its manual start and control systems provide a traditional boating experience. Whether you're looking for a vintage motor to restore or a reliable power source for your small boat, the U7E is a great choice.
Pros of buying a 1972 Yamaha U7E 25 piston engine:1. Historical value: This engine is a vintage piece from the 1970s, which makes it a collectible item for engine enthusiasts.
2. Unique design: The U7E engine has a distinctive design that sets it apart from more modern engines.
3. Potential for restoration: With some TLC, this engine could be restored to its original condition, making it a fun project for enthusiasts.
4. Affordability: Compared to newer engines, the U7E is often more affordable, making it a budget-friendly option for those looking for a vintage engine.
Cons of buying a 1972 Yamaha U7E 25 piston engine:1. Limited functionality: Due to its age, the U7E may not be as efficient or powerful as more modern engines.
2. Maintenance challenges: Older engines can be more difficult to maintain and repair due to the availability of parts and the lack of modern diagnostic tools.
3. Lack of support: As a vintage engine, there may be limited resources and support available for repairs and troubleshooting.
4. Reliability concerns: Older engines may not be as reliable as newer ones, which could lead to unexpected breakdowns or repairs.
Conclusion:The 1972 Yamaha U7E 25 piston engine is a unique and historic piece that could be a great addition to any engine collection. However, it's important to consider the limitations and maintenance challenges that come with owning a vintage engine. If you're up for a project and enjoy the challenge of restoring and maintaining older equipment, the U7E could be a great fit for you. If you're looking for a more reliable and functional engine, you may want to consider a newer model.
Recommendation:If you're interested in the U7E, I would recommend doing your research and looking into the availability of parts and support before making a purchase. You may also want to consider budgeting for potential repairs and maintenance costs. If you're up for the challenge and enjoy working on vintage equipment, the U7E could be a fun and rewarding addition to your collection.
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North way motorcycle parts this listing features a 1972 Yamaha u7e.