I got a 59 gale 5 hp that has been setting up for a number of years. I got it running with a little work. I replaced the impeller, but I am concerned because I am not feeling any misting coming out of the exhaust. I have only ran it at idle in a bucket of water. Do I need to replace the grommet that the tube slides into on the lower unit? Or is there something else that could possibly need replacing? Or is there another way to check and see if the impeller is getting water to the motor? I greatly appreciate your help!