How It Works:

    
While the tank is being filled a ‘whistling’ sound is produced by the “Fuel Whistle”.

    
The sound is loud enough to be heard from any point on the boat. It will be audible in a strong breeze or with any normal surrounding sounds. As the tank approaches full, the sound turns to a ‘warble’ and when completely full it immediately stops. This is the signal to stop the fueling process before any spill occurs.

    
Specs:

    
Overall Length 3.75"(95mm) Installed Length 2"(50mm) Width 2"(50mm)

    
Installation:

    
The 5/8" fuel vent line is cut near the fuel tank and the "Fuel Whistle" is inserted into the vent line with the arrows facing the hull vent and clamped (clamps included). The "Fuel Whistle" should be oriented within 45 degrees of vertical to allow for proper drainage. It can be held in place with 2 stainless steel screws inserted into the molded mounting ears to secure the correct orientation.

    
The "Fuel Whistle" sells for $29.95 and comes with a Money Back Guarantee.