Water pump problems

[wargle]

2008 Yamaha 90 hp 4 stroke. All of a sudden i cranked it up and saw there was no water coming out the pee hole. Checked hose to see if it was stopped up. Clear. Dropped foot checked water pump. It was two years old and looked new. Forced water up cooling tube to engine. Water came out pee hole. Forced water through pump discharge and it came out water pickup grills on foot. Reassembled all. Put on “ear muff” with water hose. Started motor still no water out pee hole or exhaust. IDK!

 

[fitz73222]

Try putting it in the water at the ramp making sure that the gearcase is fully submerged at least 5" above the gearcase joint. See if it pees. I've seen Yamahas that get finicky with flush attachments and not pump water correctly. My 115 SHO needs to have the flush attachment "just right" for it to be pee like a 6 year old, lol.

 

[William01]

If you have to disassemble again, put a drill on the drive shaft (after protecting the splines) and check that the impeller is pumping water. Running water backwards thru the water pump doesn’t check if the impeller is actually pumping.