Tom,
The personnel heater kit uses the fuel system pressure that is available to the carb. The kit instructions tell you to "T" into the carb float bowl inlet fitting.
As Joel said the primer kit is a stand alone system and it's only purpose is to help with starting the engine in cold weather by squirting an atomized blast of fuel in the front and rear halves of the intake manifold.
This is the install manual you should be using.
This shows the heater fuel line connection at the "T" which is inserted in the carb fuel inlet fitting.
The important thing to remember about gas fired heaters is fuel & fire.
The fire part has two dangers. Burning and carbon monoxide poisening.
The fuel part is a very important regulation issue. Pressure must be regulated to a narrow band. The heater's fuel flow valve regulates pressure at the burner to 1 PSI and the combustion air blower supports only the combustion chamber. Burning with an overly lean mixture results in shortened combustion can life.
Fuel inlet pressure at the "T" on the carb needs to be 4.5 to 5.0 PSI. Low pressure = lean and high pressure = rich. The heater likes anywhere from 1 to 15 PSI at it's fuel inlet.
You should also have this manual.
So if your current electric pump output is within the above parameters and your engine runs ok then just follow the heater installation instructions.
