ULTRAFLEX 38817S Interrupter Micro Switch Sterndrive X50 3.0 4.3 5.0 5.7

( Brand: Ultraflex ), ( Manufacturer Part Number: 38817S ), ( Part Type: Switch Sterndrive ), ( Material: Plastic )

Review ULTRAFLEX Shift Interrupter X50 Micro Switch Sterndrive 3.0 4.3 5.0 5.7 fits MERCRUISER

The Ultraflex 38817S Interrupter Micro Switch is a crucial component for MerCruiser sterndrive models with engine sizes ranging from 3.0 to 5.7 liter. This micro switch is designed to provide a reliable interruption of electrical current to the engine's accessory pump, ensuring optimal performance and longevity of the system.

The Ultraflex 38817S Interrupter Micro Switch is engineered with a high-quality, corrosion-resistant housing. This feature makes it an excellent choice for marine environments where exposure to water and harsh elements is common. The switch is fully sealed to prevent water intrusion and protect internal components from damage.

The switch operates on a simple principle: when the engine's rpm drops below a certain threshold, the switch opens the circuit, stopping the accessory pump. This feature helps prevent the pump from running when the engine is idling or not in use, reducing unnecessary wear and saving energy.

The Ultraflex 38817S Interrupter Micro Switch is easy to install. It comes with a convenient mounting bracket that allows for secure attachment to the engine or transom. The switch also includes clear, easy-to-understand markings on the body, making it simple to identify the proper installation orientation.

The micro switch is designed for long-lasting performance, with a durable, high-tensile spring that ensures reliable operation even in the harshest marine environments. The switch provides a clear, audible click when it is activated, allowing for easy confirmation that the accessory pump is being properly controlled.

In summary, the Ultraflex 38817S Interrupter Micro Switch is an essential component for MerCruiser sterndrive owners. It is designed with a corrosion-resistant housing, reliable operation, and easy installation in mind. This switch helps prolong the life of the accessory pump and ensures optimal performance by only activating the pump when the engine is running at the appropriate rpm.

Pros and Cons of Buying Ultraflex 38817S Interrupter X50 Micro Switch for Mercruiser Sterndrive 3.0, 4.3, 5.0, 5.7

The Ultraflex 38817S Interrupter X50 Micro Switch is a crucial component for controlling the engine revolutions in Mercruiser sterndrive units. This micro switch is designed to ensure safe and efficient operation. Let's explore the pros and cons of investing in this part.

1. Compatibility: This micro switch is specifically designed to work with Mercruiser sterndrive units, including 3.0, 4.3, 5.0, and 5.7 models.

2. Safety: The interrupter switch ensures the propeller does not continue spinning when the shift lever is moved to neutral or reverse, which is essential for safety.

3. Durability: Ultraflex is a well-known brand in marine electronics, and their products are known for their robustness and resistance to harsh marine environments.

4. Easy Installation: The micro switch is relatively easy to install, and the instructions provided by Ultraflex are clear and comprehensive.

5. OEM Quality: The Ultraflex 38817S Interrupter X50 Micro Switch is an Original Equipment Manufacturer (OEM) part, ensuring a perfect fit and optimal performance.

1. Cost: Compared to aftermarket alternatives, OEM parts like this micro switch can be more expensive.

2. Availability: Depending on the location, it might be challenging to find this micro switch in local marine parts stores.

3. Sensitivity: Some users have reported that the micro switch is overly sensitive, causing unwanted engine shutdowns.

The Ultraflex 38817S Interrupter X50 Micro Switch is an essential safety component for Mercruiser sterndrive units. Its compatibility, durability, and ease of installation make it an attractive choice for boat owners. However, the higher cost compared to aftermarket alternatives and occasional sensitivity issues might deter some users. Ultimately, considering the importance of safety and the peace of mind that comes with using an OEM part, the benefits typically outweigh the cons.

If you are a boat owner with a Mercruiser sterndrive unit and are in need of a new interrupter micro switch, the Ultraflex 38817S Interrupter X50 Micro Switch is a solid investment. Its compatibility, durability, and OEM quality make it a reliable choice for ensuring the safe and efficient operation of your boat's engine. While the cost might be a concern, the importance of safety and the potential cost savings from avoiding engine damage or accidents should be taken into account.

Details:

Shift Interrupter X50 Micro Switch for Mercruiser Sterndrive 3.0 4.3 5.0 5.7 L.

specifications otsterndriv:

• for models: Mercruiser
• brand: Ultraflex
• mpn: 38817s
• part type: Switch Sterndrive
• material: Plastic

shipping otsterndriv:

• class: Standard
• carrier: USPS
• type: Fixed
• service: USPS Ground Advantage
• transit: 4-8 Days
• cost: $0.00

seller otsterndriv:

• # reviews: 2903
• city: Loyall, Kentucky
• rating: 98.5%

general otsterndriv:

• condition: New other see details
• Boat Parts > Sterndrive Motors Components > Other

offer otsterndriv:

• sold: 0
• started: November 20, 2025
• availability: In Stock
• quantity: 1
• options: Ship-to-home

payments otsterndriv:

• credit card: Mastercard
• other
• wallet: Google-pay

returns otsterndriv:

• policy: No Returns