Mercury OilDyne Style Trim Pumps are a vital component in the power trim and tilt system of Mercury outboard engines and MerCruiser sterndrives. This hydraulic pump allows operators to adjust the angle of the motor relative to the transom, optimizing boat performance, handling, and fuel efficiency under varying water and load conditions.
Over decades of development, Mercury trim pumps have evolved to deliver greater reliability, faster response, and simpler maintenance for both recreational and high-performance applications.
Our Hi-Flow Race Trim Tilt Pump Units are built and tested, they are all delivered assembled for 3-wire Solenoid / Relay connections: High Volume Marine Pump, SAE J1171 Motor, two 1/4" and one 5/16” Ring Terminal Ends, and reservoir of your choice.
Select Type:
1) Industry Standard (SAE J1171) Motor, 3.5" Steel Reservoir, SAE #3 Fittings
2) Industry Standard (SAE J1171) Motor, Yellow Cap Plastic Reservoir, SAE #4 Fittings
3) Metal Head (ROS) Motor, 3.5" Steel Reservoir, SAE #3 Fittings
4) Metal Head (ROS) Motor, Yellow Cap Plastic Reservoir, SAE #4 Fittings
All pumps are equipped with our solid brass, ORB leak-proof, SAE fittings.
The SAE #3 fits the factory Mercury 12" and 15" Short Ram mid-section hydraulic lines.
The SAE #4 inverted flair fittings are more typical on the Mercury Single Long Ram Trim Cylinder.
Our motors have a steel laminated core, copper windings, and copper-segment commutator that are all built and tested to withstand 50x operating voltage at five load levels, so these can handle faster trim set-ups including 12v, 24v, and 36 volts.
The unit is finished with a durable epoxy powder coated for all marine corrosion protection and case-hardened motor shafts at bearing surfaces for maximum wear resistance.
Includes one (1) Hi-Flow Trim Tilt Pump Unit. Allow 2-4 Days to build.
Mounting Plates, Mercury-style Solinoids, ARCO Solinoids, 300AMP Silver Contact Solnoids, 500AMP Kilovac-style Race Relays, and Pump Rigging Services are also available.
The mounting plate measurements are approximately 6" tall x 8 1/4" wide x 1/4" thick. The mounting grommets accept 1/4", 5/16", or 3/8" bolts to secure the pump to a bulkhead.
High-performance valve adjustments can be done complimentary on request. All pumps are assembled and tested here in the USA and comes with a one-year warranty.
Part Numbers
6270, 92459A4, 18-6765, 823653A5, 92459A4, 823653A9, 92459A3, 92459A8
Mercury Oildyne Style trim pumps are essential for recreational boats, bass boats, drag boats, and other high-performance marine applications. They enhance boat handling, provide quicker motor adjustments, and improve overall fuel efficiency.
For racing and performance applications, high-speed trim pumps deliver rapid response and precision, giving operators a competitive edge. These pumps are built with durable materials, making them suitable for both saltwater and freshwater environments.
Common Issues and Maintenance for Mercury Oil Dyne Style Trim Pumps
Mercury Oil Dyne Style trim pumps, like any mechanical system, can experience wear and tear over time. Common symptoms of a failing trim pump include slow operation, air in the hydraulic system, leaking seals, and electrical failures.
If the pump struggles to lift the motor or fails to hold it in position, the cause may be low hydraulic fluid levels, worn components, or faulty wiring. Key parts such as motors, pumps, reservoirs, and solenoids can often be replaced individually, making repairs more cost-effective.
To ensure reliable operation of your Mercury Oil Dyne trim pump, regular maintenance is essential. Check hydraulic fluid levels frequently and refill with the recommended fluid as needed. Inspect hydraulic lines and seals for leaks or damage, and clean electrical connections to prevent corrosion.
Periodically test the system to verify smooth operation and promptly address any irregularities to avoid long-term damage. Proper upkeep will extend the life of your trim pump and ensure peak performance.
Contact Mike Hill at 714-697-1716 or mike@buckshotracing77.com to help sort out any trim pumps issues for all boating applications.