Golf cart problem

[ttinman23]

Golf cart won't start, battery started my car so I know its not that...When I press the gas pedal half way down and pump it in that area it has some power but not enough to turn motor. When I totally depress gas pedal nothing happens...Took the generator/starter off after dismantling half the club car but may have gotten ahead of myself....maybe its a relay, solenoid?? I'm a rookie at this. This cart is on an island and its my parents at their summer home. They would charge an arm and a leg their to get it fixed. The serial number on this AG9626-506178...Its a Club Car gas operated and that's all I know. Any input would be greatly appreciated. Also the generator/starter part number appears to be 1018294-01 (CCW)....12V 0.9HP