290931440 Rotary Valve O-Ring for Sea-Doo SPX 720 1996

Rotary Valve O-Ring for Sea-Doo

This rotary valve O-ring seals the rotary valve cover on Sea-Doo personal watercraft, replacing OEM part number 290931440 to prevent water and air leaks in the intake path.

Overview

The rotary valve O-ring is a sealing component that fits between the rotary valve cover and the engine case on Sea-Doo watercraft. This rotary valve O-ring for Sea-Doo helps maintain proper crankcase sealing so the engine draws air and fuel correctly. It is a direct replacement for worn, hardened, or leaking seals in 720 and 650 series engines.

Built For Performance

• Direct replacement for OEM part number 290931440
• Seals the rotary valve cover to the engine case
• Resists fuel, oil, and water exposure
• Maintains proper crankcase pressure
• Simple fitment during valve cover service

Fits These Machines

• for Sea-Doo SPX 720 (1996)
• for Sea-Doo SPX 650 (1995)

On-The-Job Use

• Rotary valve cover resealing during top-end service
• Engine rebuilds on 650 and 720 series powerplants
• Leak repair after seal hardening or failure
• Routine maintenance on older Sea-Doo watercraft

Specs At A Glance

Good To Know

Q: How do I know if my rotary valve O-ring needs replacing? A: Look for oil seepage around the rotary valve cover, rough idle, or hard starting that points to a crankcase air leak. A hardened or flattened O-ring is a common cause on older watercraft.

Q: Can I reuse the old O-ring during a valve cover service? A: Reusing a compressed or hardened O-ring often leads to leaks shortly after reassembly. Replacing it with a fresh rotary valve O-ring is the safer choice whenever the cover comes off.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.