I have an issue> i have a 1989 force 125, when the muffs are on water will come out the pee hole lightly at a idle, but when muffs are off and lower unit submerged to the water intake ports in a tank, no water at idle or reved up, then side of engine is too hot to touch and starts running rough, why wont the water pump pick up the standing water in the tank, it only works with the muffs and possative flow from the hose and at that doesnt work very well...