The 3-Wire Power Trim Tilt Pump Motor from Buckshot Racing #77 is a high-quality replacement designed for Mercury Marine, Mercury Racing, and Mariner trim and trim tabs systems.
 
Built to meet SAE J1171 marine ignition protection standards, this motor is engineered for safe, reliable operation in marine environments where electrical components must perform under constant exposure to moisture, vibration, and load.
 
This unit is designed as a direct replacement for OEM Mercury trim pump motors, restoring proper trim and tilt functionality in a wide range of outboard and sterndrive applications.
 
Engineered for High Load and Marine Conditions
 
At the core of this trim motor is a steel laminated armature paired with precision copper windings and a copper-segment commutator. This construction ensures efficient electrical performance while maintaining durability under repeated cycling and varying load conditions.
 
The internal components are designed and tested to withstand significantly higher voltage demands than standard operating conditions. This allows the motor to perform reliably not only in typical 12-volt systems but also in higher-voltage setups often used in performance applications where faster trim response is required.
 
To further enhance durability, the motor shaft is case-hardened at critical wear points, improving resistance to long-term mechanical wear at the bearing surfaces. The exterior housing is finished with a marine-grade epoxy powder coating, providing excellent corrosion resistance in both freshwater and saltwater environments.
 
Direct OEM Replacement with Broad Compatibility
 
This 3-wire trim motor is designed to replace several Mercury OEM trim pump motors, making it a versatile solution across many Mercury and Mariner systems that utilize this style of motor. Its compatibility is based on OEM part number matching rather than limited model-specific applications, ensuring proper fitment when replacing an existing unit with the same configuration.
 
Because Mercury has used similar trim-system designs across many outboard and sterndrive platforms, this motor is commonly used in a wide range of applications that require a 3-wire trim motor. Proper identification should always be based on the existing motor and OEM part number.
 
Complete Installation Components Included
 
Each Buckshot Racing #77 trim motor includes the necessary components to support a proper installation. A new O-ring is provided to ensure a secure seal between the motor and pump assembly, helping prevent fluid leaks and maintaining system integrity. The kits also includes mounting hardware allows for a straightforward installation process.
 
Replacing these components during installation helps restore full functionality and prevents common issues associated with worn seals or misalignment.
 
OEM and Cross Reference Identification
 
This motor corresponds to several Mercury OEM and aftermarket part numbers, making it easy to confirm compatibility during replacement. The primary Mercury references include 17649A02, 17649A1, and 17649T, which are commonly associated with this style of trim motor.
 
Additional cross-reference numbers include Sierra 18-6772, along with aftermarket identifiers such as 87828, 9-18207, and 93692. These part numbers all relate to the same general motor configuration, allowing for accurate identification when replacing an existing unit.
 
Importance of a Properly Functioning Trim Motor
 
The trim and tilt system plays a critical role in overall boat performance and handling. A properly functioning motor allows the operator to adjust engine angle efficiently, improving ride quality, fuel efficiency, and top-end performance. A failing motor can lead to slow or inconsistent trim operation, which affects both performance and safety.
 
Ensuring that the correct replacement motor is installed helps maintain consistent operation and protects the hydraulic system from unnecessary strain.
 
The Buckshot Racing #77 Mercury 3-Wire Trim Tilt Pump Motor is a reliable, OEM-compatible replacement designed to restore proper function to Mercury and Mariner trim systems. With durable internal construction, corrosion-resistant finishing, and complete installation components, it provides a dependable solution for maintaining trim performance in demanding marine environments.
 
When replacing a trim motor, always verify the OEM part number to ensure correct fitment. Using a properly matched replacement ensures long-term reliability and consistent operation on the water.
 
Contact Mike Hill at mike@buckshotracing77.com or +1-714-697-1716 for tech supports.