Re: 2002 merc 150 wont pee is it my impeller?
Probably a clogged pee hose, find a stiff wire of some sort, and try to unclog it .
Can also trace the hose back to the engine block and unhook it there to see if water comes out of the block itself ( engine running ), if so compressed air can be used to clear the hose.
If you are unsure if the engine gets water at all... take it to someone who knows outboards and get them to verify if it's OK or needs attention ...
Arne Kjetil