If you’re maintaining or upgrading your Mercury 2.5 Liter 2-Stroke V6 Outboard motor, the Cylinder Head Water Jacket O-Ring Gasket (replaces OEM Part Number 8584521) and O-Ring Seal (replaces OEM Part Number 8597721) Kit from Buckshot Racing #77 is an essential component to ensure reliable performance and longevity of your engine.
This kit also fits billet aftermarket billet aluminum heads from Power Performance (PPE) and Ox Performance, providing versatility for a range of applications.
Our kit includes all the necessary components to service the cylinder heads of your Mercury 2.5L V6 Outboard engine. Each kit contains:
1 x Cylinder Head Water Jacket O-Ring
OEM Part Number: 8584521
Cross-Reference Part Numbers: 8M0149612, 8584521, 8584521
3 x Cylinder Head Seal O-Ring
OEM Part Number: 8597721
Cross-Reference Part Numbers: 8584531, 859772, 8597721
This kit is designed to fit Mercury 2.5L 2-Stroke V6 Outboards, including the 150 HP, 175 HP, 200 HP, 210 HP, and 240 HP Sportjet models. It is compatible with carbureted, EFI, and DFI fuel systems, ensuring broad compatibility for various setups. Each kit services one cylinder head, and two kits are required if both heads are being replaced on the V6 engine.
The gaskets and O-rings in this kit are manufactured to meet or exceed OEM specifications, ensuring a perfect fit and optimal sealing for Mercury 2.5L V6 engines.
The Cylinder Head Water Jacket O-Ring Gasket (replaces OEM Part Number 8584521) ensures a secure seal between the cylinder head and engine block, preventing coolant leaks that can lead to overheating.
The Cylinder Head Bore Seal O-Rings ( replaces OEM Part Numbers 8584531, 8597721) provide robust sealing around the cylinder bores, maintaining proper pressure and avoiding contamination. By using high-quality materials and precision manufacturing, Buckshot Racing #77 ensures your engine runs reliably.
This kit is also compatible with billet aftermarket heads from Power Performance (PPE) and Ox Performance, expanding its application to high-performance setups.
Installation Tips for Mercury 2.5L V6 Outboards
Ensure you have the appropriate tools for disassembling the cylinder head. Clean the mating surfaces thoroughly to ensure the gasket and O-rings seat properly. Refer to your Mercury service manual for torque specifications and assembly procedures. Step-by-Step Installation:
Remove the Cylinder Head: Disconnect any coolant lines and remove the fasteners securing the cylinder head.
Inspect the Surfaces: Check the cylinder head and block surfaces for any warping or damage. The Matting surfaces should be 100% clean and flat.
Install the Water Jacket Gasket: Align the Cylinder Head Water Jacket Gasket (8584521) to the cylinder block.
Position the O-Rings: Place the Cylinder Head Bore Seal O-Rings (8597721) securely into their respective grooves.
Reassemble the Cylinder Head: Bolt the cylinder head back onto the engine, following the manufacturer’s torque specifications.
Repeat for the Other Cylinder: Use a second kit for the opposite cylinder head on the V6 engine.
Maintenance and Replacement Recommendations
To keep your Mercury 2.5L outboard performing at its peak, regular maintenance is essential. Replace the cylinder head gasket and O-ring seals as part of your engine’s scheduled service, particularly if you notice coolant leaks, loss of compression, or overheating issues.
Using high-quality replacement parts like the Cylinder Head Water Jacket Gasket (8584521) and Cylinder Head Bore Seal O-Ring (8597721) ensures your engine remains in excellent condition.
Why Regularly Check Your Cylinder Head Seals?
The water jacket gasket and O-rings are critical to maintaining the integrity of your Mercury 2.5L V6 engine. Neglecting them can lead to significant damage, including overheating and reduced engine performance.
By using Buckshot Racing #77’s kit, which also fits billet aftermarket heads from Power Performance (PPE) and Ox Performance, you’re investing in reliability when re-installing your heads.
The Cylinder Head Water Jacket Gasket & O-Ring Seal Kit from Buckshot Racing #77 is a must-have for anyone servicing a Mercury 2.5L V6 Outboard motor. With precise engineering, compatibility with various models, and robust sealing performance, this kit is your go-to solution for maintaining your engine’s reliability. Its compatibility with both OEM and aftermarket billet heads further enhances its value.
Each Kit Contains
1 x Cylinder Head Water Jacket O-Ring Gasket and 3 x Cylinder Head Seal O-Ring. If both heads on the V6 are being installed, order 2 kits at check out.
For any questions, contact Mike Hill at +1-714-697 1716 or mike@buckshotracing77.com.