Home › Forum › Ask A Member › Mercury outboard not peeing. › Re: Mercury outboard not peeing.
Those engines have an engineered bend in the water tube. Careless installation of the lower unit can sometimes cause this bend to go too far, which essentially makes the tube too short to go into the grommet on the top of the pump. Before doing anything else, I would take some careful measurements to make sure this is not the problem. Measure the fore and aft position of where the bottom of the water tube should be in the drive shaft housing, with relation to the pump. Then, compare height/depth measurements of the grommet location in the pump, with the end of the water tube. The tube should go fully into the grommet. If this is a problem, the tube can be carefully straightened out a bit, using a long crow bar or similar tool.
If this happens to check out good, then you can find a piece of copper tubing to simulate the height of the actual water tube, put it into the pump, stick the lower unit in a barrel of water and turn the drive shaft with a drill motor, to check the pump operation. Please take care not to electrocute yourself, of course. Battery drills are best…..
Long live American manufacturing!