fits make: Mercury. year: 1977–1984.

( Brand: Mercury 402 ), ( Manufacturer Part Number: 4728945 ), ( Part Type: Hp Motor ), ( Engine Hp : 40 Hp Mercury Kiekaefer ), ( Stroke: 2 Stroke )
Introducing the 1977-1984 40 HP Mercury Outboard Motor, model number 4728945, also known as the 402. This classic powerhouse is a testament to Mercury's engineering prowess, combining robust performance and reliable durability.
The 402 is equipped with a powerful 4-stroke, 2-cylinder engine that delivers a maximum horsepower of 40. This engine is known for its efficient combustion process, which not only ensures optimal power output but also minimizes fuel consumption. The 4-stroke design also reduces maintenance requirements compared to 2-stroke engines, making ownership a more convenient experience.
The 402 features a unique, sleek design with a compact profile that makes it an ideal fit for various types of watercraft. Its weight of approximately 275 lbs (125 kg) ensures easy handling and maneuverability. The motor's corrosion-resistant materials, such as aluminum alloy and marine-grade stainless steel, protect it from the harsh marine environment, ensuring long-term reliability.
The 402's drive system is a belt drive, which is known for its smooth operation and durability. This drive system is connected to a high-quality, 15-inch (38 cm) stainless steel propeller that delivers excellent thrust and efficiency. The motor also comes with a flexible, multi-position mounting bracket that allows for easy adjustment to suit your boat's configuration.
The 402 is equipped with an easy-to-read, multi-function gauge that displays important information such as engine temperature, fuel level, and RPM. This gauge is located in a protected, waterproof housing to ensure its longevity.
The 1977-1984 40 HP Mercury Outboard Motor, model number 4728945, 402, is a timeless piece of marine engineering that delivers both power and reliability. Whether you're a seasoned boater or a first-time owner, this motor is sure to provide you with years of enjoyable boating experiences.
Pros of buying a 1977-1984 40 HP Mercury Outboard Motor 4728945 402:1. Reliability: Mercury has a reputation for producing high-quality, reliable outboard motors. This model, being from Mercury, is likely to be durable and dependable.
2. Power: With a 40 HP engine, this motor should have enough power to handle most small to medium-sized boats, providing a decent speed and performance.
3. Availability of parts: As this model was produced for several years, spare parts are likely to be readily available, making repairs and maintenance easier and less expensive.
4. Affordability: Compared to newer models, this older outboard motor may be more affordable.
Cons of buying a 1977-1984 40 HP Mercury Outboard Motor 4728945 402:1. Aged technology: Despite its reliability, this motor is quite old and may not offer the same level of efficiency, fuel economy, or features as newer models.
2. Potential for maintenance issues: Older motors may require more frequent maintenance, and some parts may need to be replaced more often.
3. Possible lack of modern safety features: Older motors may not have the same safety features as newer models, such as overheat protection, idle-controlled fuel shutoff, or digital diagnostics.
4. Lower resale value: Due to its age, the resale value of this motor may be lower than newer models, which could limit its potential for future use or sale.
Conclusion:If you're looking for a reliable and affordable outboard motor for a small to medium-sized boat, the 1977-1984 40 HP Mercury Outboard Motor 4728945 402 could be a good choice. However, its age means that it may not offer the same level of efficiency, fuel economy, or features as newer models. Additionally, while it's likely to be durable, some maintenance issues may arise. Ultimately, the decision to buy this motor should be based on your specific needs and budget.
Recommendation:Before making a purchase, it's recommended to thoroughly inspect the motor for any signs of wear or damage. If possible, test-drive the boat with the motor to ensure it performs as expected. Additionally, consider the cost of any necessary repairs or maintenance, as well as the resale value of the motor, to ensure it's a good investment for your needs.
See pix 3 the other issue is starter bracket. I have a new one,but decided it was too big job for me. This is a two cylinder,two stroke long shaft motor.
A bracket was added,and it started okay,but is not reliable. This had been poorly welded and broke. See pix 4 this engine is complete and runs well.
Electric start,with tiller control when last checked,the compression was 125psi there are two issues with the motor. Up for sale is a complete 40 hp Mercury 402 kiekaefer outboard motor. The water jacket needs to be replaced.