YAMAHA 3H4-20 Cdi Box Et Ecu Ignition Unit

( Manufacturer Part Number: 3H4-20 ), ( Part Type: Ignition Box Ecu Unit )

Review YAMAHA Et Oe Cdi Ecu Ignition Unit Box fits ENTICER 250 300 340 1978–1984

The Yamaha 3H4-20 78-84 Enticer ET 250, 300, 340 CDI ECU Ignition Unit is a crucial component for the proper functioning of your Yamaha watercraft. This advanced electronic control unit (ECU) is specifically designed for Yamaha Enticer models produced between 1978 and 1984 with 250, 300, or 340 CDI engines.

The ignition unit box houses the Electronic Control Unit (ECU) and the Ignition Coil. The ECU manages the engine's fuel injection system, ignition timing, and various other engine functions. It receives input from various sensors, such as the crankshaft position sensor, air temperature sensor, and throttle position sensor. Based on this data, the ECU calculates the optimal fuel injection timing and ignition timing for each engine condition. This results in improved engine performance, increased fuel efficiency, and reduced emissions.

The ignition coil, which is also located in the ignition unit box, converts the battery voltage to the high voltage required to create a spark in the engine's spark plugs. This spark is necessary to ignite the fuel-air mixture in the engine's cylinders, allowing the engine to run.

The Yamaha 3H4-20 78-84 Enticer ET 250, 300, 340 CDI ECU Ignition Unit is a robust and reliable component, designed to withstand the rigors of continuous use on the water. It is built with high-quality materials and advanced technology to ensure long-lasting performance. The unit is also easy to install, with clear instructions provided in the user manual.

In summary, the Yamaha 3H4-20 78-84 Enticer ET 250, 300, 340 CDI ECU Ignition Unit is a vital component for the proper functioning of your Yamaha watercraft. It manages the engine's fuel injection system, ignition timing, and various other engine functions, ensuring optimal performance, improved fuel efficiency, and reduced emissions. This advanced electronic control unit is specifically designed for Yamaha Enticer models produced between 1978 and 1984 with 250, 300, or 340 CDI engines.

Pros and Cons of Buying Yamaha 3H4-20 78-84 Enticer ET 250, 300, 340 CDI ECU Ignition Unit Box

The Yamaha 3H4-20 78-84 Enticer ET 250, 300, 340 CDI ECU Ignition Unit Box is a replacement part for Yamaha outboard motors. It includes the Engine Control Unit (ECU) and ignition coils, which are crucial components for proper engine operation.

a. Improved Performance: A new ECU and ignition unit can enhance your outboard motor's performance, ensuring optimal combustion and fuel efficiency.

b. Reliability: Replacing worn-out components with new ones can increase the overall reliability of your outboard motor, reducing the risk of unexpected breakdowns.

c. Compatibility: This part is specifically designed for Yamaha Enticer ET 250, 300, and 340 CDI outboard motors, ensuring a perfect fit and seamless integration.

a. Cost: Replacing an ECU and ignition unit is a significant investment, especially for older outboard motors.

b. Labor Costs: Installing the new part requires professional expertise, increasing the overall cost of the repair.

c. Availability: In some cases, finding this specific part for older models may be challenging, as it might be discontinued or hard to source from local suppliers.

Deciding to buy the Yamaha 3H4-20 78-84 Enticer ET 250, 300, 340 CDI ECU Ignition Unit Box depends on your specific situation. If your outboard motor's performance has deteriorated, or you experience frequent breakdowns, investing in a new ECU and ignition unit may be a worthwhile investment to ensure reliability and improved performance. However, for older models, the cost and availability of the part should be carefully considered.

Before making a final decision, it's essential to assess the overall condition of your outboard motor and weigh the potential benefits against the costs. Consulting with a professional mechanic can help you make an informed decision based on your specific situation. Additionally, exploring alternative solutions, such as rebuilding the existing components or upgrading to a newer model, may be worth considering.

Details:

This ignition unit is designed by Yamaha and carries the manufacturer part number 3H4-20. Good used condition comes as pictured The product is an original equipment CDI ECU ignition unit box for Yamaha Enticer ET 250, 3 and 340 snowmobiles, specifically model's from 1978 to 1984. It is a crucial component for maintaining the proper functioning of snowmobiles ignition system, ensuring reliable performance and optimal fuel efficiency.

part #: 3h420 prices

• $100.00-$112.79

specifications snowpar:

• for models: 250, 300, 340, Enticer
• for makes: Yamaha
• for years: 1978-1984
• mpn: 3h4-20
• part type: Ignition Box Ecu Unit

general snowpar:

• Parts Accessories > Snowmobile Parts > Other Parts
• condition: Used

returns snowpar:

• policy: No Returns

seller snowpar:

• rating: 99.1%
• city: Erhard, Minnesota
• # reviews: 8868

offer snowpar:

• started: January 13, 2026
• quantity: 1
• options: Ship-to-home
• best offers: True
• sold: 0
• availability: In Stock

shipping snowpar:

• service: USPS Priority Mail
• carrier: USPS
• transit: 2-7 Days
• class: Expedited
• cost: $0.00
• type: Fixed

payments snowpar:

• credit card: Visa
• other
• wallet: Paypal

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