some of you know, i just got my first old merc, always had johnson and evinrude. took it out tonight, and the pisser would pump a little, but then just drip. the water wasn't real hot, and i pulled the clam shell aand even the top cylinders were not too hot to touch. i will try to blow air into the pisser, and maybe blow out some junk in there. i believe the waterpump was done last year, before i got it. i limped in at idle and never saw steam.

is it just the water pump? any thoughts would be great. thanks alot.