Luv2fish
Well-known member
Yesterday I decided to change the waterpump on my F150 4 stroke. I had done other motors that I've owned but this was the first time on the Yamaha. I was pleasantly surprised at how easily the bolts came out of the motor (this is a 2006 with 950 hours). They had been greased by the shop that I had replace it in the past. This water pump had over 200 hours and I recently had a run in with a sand bar.
Now for the downside. It took me about 1 hour to pull the lower unit and replace all the parts. I went with a complete rebuild so I replaced all gaskets, bolts, the two O-rings, the impeller, impeller housing and the key. It came apart nicely and went back together nicely. I have a service manual which helps but this is a pretty simple job.
After I got it put together I put the muffs on the motor to test it. You guessed it, no water out of the indicator hole. I hooked the hose up to the flush port and it pee'd fine. I thought maybe I put the pump together wrong so I pulled the lower unit again. I repeated this 4 times. I even put the motor in a trash can with water (as much would fit anyway).
Finally I remembered reading that sometimes they just won't pee using the muffs. I thought maybe the trash can wasn't enough water so I took it to my local launch. I backed it in to the water and started it up. It immediately started a nice pee stream.
I wasted about 3 hours pulling the lower unit again and again to make sure of things I was already sure of. Remember this if you ever decide to do this job for yourself.
Steve
Now for the downside. It took me about 1 hour to pull the lower unit and replace all the parts. I went with a complete rebuild so I replaced all gaskets, bolts, the two O-rings, the impeller, impeller housing and the key. It came apart nicely and went back together nicely. I have a service manual which helps but this is a pretty simple job.
After I got it put together I put the muffs on the motor to test it. You guessed it, no water out of the indicator hole. I hooked the hose up to the flush port and it pee'd fine. I thought maybe I put the pump together wrong so I pulled the lower unit again. I repeated this 4 times. I even put the motor in a trash can with water (as much would fit anyway).
Finally I remembered reading that sometimes they just won't pee using the muffs. I thought maybe the trash can wasn't enough water so I took it to my local launch. I backed it in to the water and started it up. It immediately started a nice pee stream.
I wasted about 3 hours pulling the lower unit again and again to make sure of things I was already sure of. Remember this if you ever decide to do this job for yourself.
Steve
