Valve Stem Seal for 2027 Sea-Doo Spark 90 3Up 1000 - Replaces 420431671

Valve Stem Seal for 2027 Sea-Doo Spark 90 3Up 1000, a direct replacement for OEM part number 420431671.

Valve stem seals fit over the top of the valve guides and control how much oil runs down the valve stem into the combustion chamber. Hardened or worn seals let oil past, leading to smoke, oil consumption and carbon build-up on valves and plugs.

When You Need It

• Blue smoke on start-up or deceleration
• Rising oil consumption
• Oil-fouled spark plugs or heavy carbon on the valves
• Any time the valves are removed

Fitting Tips

• Always fit new stem seals when the valves have been removed
• Use a seal installer to avoid damaging the seal lip

Product Details

• Part Type: Valve Stem Seal
• Replaces OEM: 420431671
• Brand: Aftermarket
• Condition: New
• Suits: 2027 Sea-Doo Spark 90 3Up 1000

Please compare the OEM number with your original part before ordering. Contact us if you need help confirming the right part for your watercraft.