11009-3713 Muffler Gasket for Kawasaki JS 300 1986-1988

Muffler Gasket for Kawasaki

This muffler gasket seals the exhaust connection on Kawasaki JS 300 watercraft, replacing OEM part 11009-3713.

Overview

This muffler gasket for Kawasaki provides a tight seal at the muffler joint on the JS 300 exhaust system. Designed for 1986 to 1988 JS 300 models, the gasket for Kawasaki watercraft prevents exhaust leaks and reduces vibration at the connection point. It suits riders handling routine exhaust service or a full rebuild.

Built For Performance

• Cut to match the muffler flange opening
• Handles continuous high-temperature exhaust flow
• Seals against leaks under vibration
• Heat and corrosion resistant construction
• Direct replacement for OEM part 11009-3713

Fits These Machines

• for Kawasaki JS 300 1986
• for Kawasaki JS 300 1987
• for Kawasaki JS 300 1988

On-The-Job Use

• Resealing the muffler joint during exhaust repair
• Replacing a burnt or leaking muffler gasket
• Routine maintenance on older JS 300 watercraft
• Refreshing the exhaust system after storage

Specs At A Glance

Good To Know

Q: Can I reuse this gasket if it still looks intact? A: Muffler gaskets compress and harden with heat, so a fresh gasket is recommended whenever the joint is opened. Reusing one can lead to leaks that are hard to trace later.

Q: What causes a muffler gasket to fail? A: Constant heat cycling, vibration, and age break down the material over time. A failed gasket often shows as exhaust noise or soot around the joint.

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