Briggs and Stratton B and S Fuel Tank Gas Cap

Compatibility: for 700 - 750 EX engines. Provides a# of critical functions such as preventing gas tank fumes from leaving the tank as well as protecting the fuel from outside contamination & maintains the appropriate pressure in the fuel tank. Many fuel tanks are designed to use a vented fuel cap to prevent a vacuum from forming in the fuel line. If fuel is leaking from the cap, a properly fitted replacement cap can solve the problem.