I've been having trouble with my livewell pump air locking after cranking up and moving to another spot. When I get there it has air locked and I have a hard time getting it pumping again. Sometimes I have to cup my hand and push water into the thru-hull inlet. I have tried it with the livewell pump being left on and left off while moving with the same results. I have a timer on it so I have tried it at run and timed run too; same results. Do you think the impeller might be bad? It works great when it's working. Do I need to add a check valve inline or just scrap the pump and get another one. What is the best affordable aerator pump? I didn't know if I should post here or in the boat repair section.