The Model H carburetor employs the conventional float needle and seat to control fuel level in the float bowl. In accordance with the balanced float
bowl design dual floats are used to maintain a constant fuel level throughout all operating ranges. The float bowl is designed so that the fuel is centrally located around and as close to the venturi area as possible so that efficient carburetor metering may be maintained under all engine operating conditions.
Fuel entering the carburetor must first pass through the inlet filter located behind the fuel inlet nut. The fuel filter is cylindrical in shape and is held in place against the fuel inlet nut by a small pressure relief spring. The filter element can be easily removed for periodic cleaning by removing the fuel inlet line and nut. If the filter should become clogged at any time, fuel flow will not be restricted because the filter element will be pushed off its seat, against the pressure relief spring, allowing fuel to temporarily by-pass the filter element. A small fibre gaske seals the fuel filter element against the inside of the fuel inlet nut .