[kaos420]

my 08 yamaha f150 has no water from the telltale while idling on ear muffs, recently replaced the w.p. impeller and housing, i have heard from some dealers that this is normal on the hose, but the temp alarm sounds after a min or 2, the engine is not to hot to touch, can anyone shed some light on my problem?

[sigma]

Are the muffs the square ones by yamaha or the cheap round ones?

Could be lack of water pressure at the hose as well.

Ever run it before on the muffs without a problem????

[KC4YIN]

You should use the muffs that are rectangular in shape with water feed on both sides. Be sure to rotate the muffs vertically to match the water pickup on the lower unit. That should solve your problem.

[kaos420]

its the square ones but not sure if there from yamaha, we have pretty good water pressure, just got the boat not long ago from my uncle who passed away this summer, as far as i know he did not have any problems with the rig, put it in the water once since i've owned it, it was doing the same thing then as it is now which prompted to replace the impeller and housing only ran it on the hose since then for a min or two at a time

[kaos420]

i'll be sure to try them vertically, thanks

[KC4YIN]

Do you have water from the tell tale while the boat is in the water?
I had this same problem when I first got my 04 150 and I just probed the telltale hole with a tooth pick and it started peeing like it should.

[kaos420]

have not had it in the water since i replaced the pump(which had some very slight damage/wear). i can pull the hose for the tell tale at the engine side and blow through it with ease

[joe009]

i have the same engine,and had the same tbl.there are water intakes on the lower unit.one in the front,two on the right side,above the main water intakes,just below the lower unit rim.they must be taped up.

[kaos420]

got her in the water today and she ran great. Smoot, quiet, and 50 mph no problem, thanks again guys!