I have a new boat with 40 hrs on. I'm greasing my impeller every 20 hours as recommended (Just giving it a few squirts until I feel some back-pressure). My question is when I grease it this time on the first squirt a few drops of water squirted out of the big nut inside there housing the grease zert. I gave it one more squirt & alittle grease came out also. I did not have this on my last boat. Should I remove the place diverter & tighten the nut or is it OK?