I have a johnson 88 and it ran fine all day but I noticed the water pump indicator stream nozzle fell off. Now there is just a gray fastner and a clip where the on the inside of the housing where the nozzle was. I positioned the gray fastner piece where the water should come out but it only drips water even at full speed. The water pressure gauge is at 15 at full speed. I hooked it up to my hose and water comes out on the lower unit where it should but still no stream. Can I just buy a new nozzle and try to put it on myself? or should I go to the mechanic?