The Oil Injection Pump Block Off Kit – Precision CNC-Machined only from Buckshot Racing #77 is the premier solution for removing the factory oil injection system from Mercury V6 2-stroke outboard engines, including all 2.0L, 2.4L, and 2.5L models produced between 1976 and 2018.
Whether you’re restoring an older outboard or preparing for high-performance use, this upgrade allows you to eliminate the OEM oil injection pump, gear, and linkage—components known to wear or fail over time—and switch to premixed two-stroke fuel for greater reliability, improved efficiency, and full control over your fuel-to-oil ratio.
Precision-machined from aerospace-grade 6061 billet aluminum, this high-quality kit is built to withstand harsh marine environments and is available in three anodized finishes:
🔴 Red – bold and race-inspired
🔵 Blue – a clean, performance-oriented look
⚫ Black – sleek, OEM-style stealth finish
These corrosion-resistant color options not only offer long-term protection but also add a custom, high-performance aesthetic to your engine build.
Each kit includes one (1) long-insert block-off plug (OEM cross-reference 43453) for proper bushing retention, one (1) Mercury-spec O-ring (25-11379) to ensure a tight, leak-free seal, two (2) stainless steel socket head screws (10-41506)m one (1) Allen key, and one (1) set of instructions.
The extended plug design is a critical engineering feature that matches Mercury Marine’s original thermoplastic insert, ensuring that the oil pump drive bushing stays securely in place after removal of the injection system.
⚠️ Don’t be fooled by poorly engineered block-off kits that lack this long insert. Without it, the bushing can dislodge during operation, potentially causing serious internal engine damage. Buckshot Racing’s solution delivers the performance, fit, and peace of mind you can count on.
The kit directly replaces Mercury OEM part #43453T and is fully compatible with outboards using oil injection pump part numbers 32509, 815698, 41429A2, 12726, 193856, and more. It fits a wide range of Mercury and Mariner engines, including 135 HP, 150 HP, 175 HP, 200 HP, and 225 HP V6 2-stroke models, such as the Black Max and Pro Max series.
Built by racers, for racers—and trusted by serious marine professionals—this Oil Injection Pump Block Off Kit – Precision CNC-Machined only from Buckshot Racing #77 is the reliable solution for enhancing performance and preventing oil injection failures.
🔧 Quick Installation Instructions
Remove the oil injection pump and drive gear from the engine.
Clean the mounting and insert surfaces and ensure your directional fit
Apply a thin layer of silicone around the O-ring (included) and seat it into the block.
Insert the long block-off plug into the mounting hole—it's machined to fit in only one orientation.
Secure the plug using the provided stainless screws to a wrist tight or factory torque to spec.
Allow the sealant to cure per manufacturer's instructions before operating the engine.
📩 For technical questions or to confirm compatibility, contact Mike Hill at mike@buckshotracing77.com or call (714) 697-1716.