...my father and I took the lower unit off thinking that maybe the impeller was bad but it looks<br />just fine. In fact, my dad took it to a repair shop for a mechanic to look at and he said that <br />there is nothing wrong with it. The mechanic then suggested that maybe the thermostat isn't<br />working properly (sand buildup?) which could cause the problem. So, a week later we pulled <br />the thermostat and there was some corrosion but that was it. Regardless, we then started the <br />motor without the thermostat and still weren't getting any water to spit out of the exhaust <br />holes. Now we are stumped. If the impeller is fine and the thermostat isn't the cause then <br />what could it be? Any help would be greatly appreciated. 