i honestly could not tell you as i have no experience with anything but LTs. but i would want the pump on and primed before i started. so if you are just sitting idle at the boat ramp warming the motor up the pump is not working? I would wire off something that is hot when the ignition is in the on position. Thats why i use the carb solenoid wire. you use your carb solienoid wire? b&s wire configs are all the same. it will be a white wire coming off the switch. try this diagram
http://www.tulsaenginewarehouse.com/dra ... wiring.pdf this will help you find a hot wire.