The Oil Injection Pump Block Off Kit, Mercury OEM Part Numbers 43453T, is a practical solution for eliminating the oil injection system on Mercury V6 2-stroke engines produced between 1976 and 2018.
This modification removes the oil injection pump, linkage and gear, which operates off the crankshaft, thereby reducing engine drag and allowing users to premix two-stroke oil directly with gasoline in the fuel tank.
This modifcation provides more control over the fuel-oil mixture and enhances reliability by eliminating potential failures associated with the oil injection system.
Our kit directly replaces the Mercury Marine and Mariner OEM manual oil pump parts and it includes:
- One (1) Block-off plug (43453): Machined to fit precisely into the oil pump mounting location.
- One (1) Sealing O-ring (25-11379): Provides a reliable seal to prevent leaks.
- Two (2) mounting screws (10-41506): Designed for secure installation.
The kit is compatibile with these OEM parts ensures a seamless fit and function for a wide range of Mercury 135 HP, 150 HP, 175 HP, 200 HP, 225 HP, Black Max, Pro Max 2.0-2.5 Liter V6 2-stroke engines with oil pump part numbers: 32509, 815698, 41429A2, 12726, 193856 and others.
Installation Steps to Install the Oil Injection Block Off Kit:
Remove Existing Components:
- Detach the oil pump and drive shaft from the engine. Ensure all old components are removed to create a clean mounting area.
Prepare the Block Off Kit:
- Lightly coat the sealing O-ring with a thin band of silicone sealant around its contact area to ensure a secure and leak-free seal.
Align the Block-Off Plug:
- Align the insert correctly with the oil pump mounting hole. The plug is designed to fit in only one orientation for precise installation.
Secure with Mounting Screws:
- Use the two included screws to fasten the block-off plug into place. Tighten the screws lightly to the manufacturer’s recommended torque specifications to avoid over-tightening and potential damage.
Inspect the Installation:
- Check for any gaps or misalignment. Allow the silicone sealant to cure as per the sealant manufacturer’s instructions before operating the engine.
Technical Benefits
Engine Drag Reduction: By removing the oil injection gear, which operates directly off the crankshaft, engine efficiency is improved.
Simplified Maintenance: Premixing fuel and oil eliminates reliance on the oil injection system, reducing potential points of failure.
Improved Reliability: Eliminates the risk of oil pump or gear failure, which could result in catastrophic engine damage.
This kit is designed for use on Mercury V6 2-stroke engines manufactured from 1976 to 2005. Confirm your engine model and year to ensure compatibility. For further technical assistance, contact Mike Hill at mike@buckshotracing77.com or 714-697-1716.
By following these steps and leveraging the high-quality components included in the kit, users can enhance the performance and reliability of their Mercury V6 2-stroke engines while simplifying fuel management.