Fuel Injector Insulator Seal for Kawasaki STX-12F 1200 2003-2007

Fuel Injector Insulator Seal for Kawasaki

The Fuel Injector Insulator Seal for Kawasaki STX-12F 1200 watercraft cushions the fuel injector where it seats in the engine, helping seal the joint and prevent vacuum leaks on 2003 through 2007 models.

Overview

This fuel injector insulator seal for Kawasaki is a direct-fit sealing component that sits between the injector and its mounting point on the engine. It helps maintain a tight seal so the injector delivers fuel cleanly into the intake without unmetered air entering the system. Built for riders and mechanics servicing the STX-12F 1200 from 2003 to 2007, this insulator seal keeps fuel delivery consistent run after run.

Built For Performance

• Constructed from fuel-resistant material suited to constant contact with gasoline
• Cushions the injector body to reduce vibration-related wear
• Helps prevent vacuum leaks that can cause rough idle or lean running
• Shaped to match the injector seat for a precise, stable fit
• Sold as a single insulator seal for straightforward replacement

Fits These Machines

• for Kawasaki STX-12F 1200, 2003
• for Kawasaki STX-12F 1200, 2004
• for Kawasaki STX-12F 1200, 2005
• for Kawasaki STX-12F 1200, 2006
• for Kawasaki STX-12F 1200, 2007

On-The-Job Use

• Replacing worn or hardened injector seals during routine fuel system service
• Freshening injector sealing after pulling the fuel rail for cleaning
• Diagnosing and correcting lean conditions traced to leaking injector seals
• Keeping personal watercraft running smoothly through regular maintenance

Specs At A Glance

Good To Know

Q: How many insulator seals should I replace at once? A: Since injectors are usually serviced as a set, replacing all insulator seals at the same time is the best way to keep sealing consistent across the fuel rail. Q: Can a worn insulator seal really affect how the engine runs? A: Yes. A hardened or cracked seal can allow air to leak past the injector, which often shows up as a rough idle, hesitation, or a lean running condition.

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