water pump

[captinr0n]

My 150 4 stroke water pump goes out regurarly been replaced 3 times in the past year by two different shops its not peeing now and overheating what is the problem

[99yam40]

could be the way you run it or where you run it..
is there a lot of sand/dirt, sea weed, or trash in water?
do you run it in real shallow water?
do you ever start it up when up out of the water?
do you replace the impeller only or do a kit?

what has the ones you pulled out look like( problems found)?

No magic crystal balls for us to look into, so you will have to give more info

[bogydave]

Replaced mine. 115TJR
Run in silty, muddy rivers.
Glad I replaced it, was still pumping, got lucky.
Over 100 hours on it.

[tidelee10]

Only 100 hours? Got me scared....I am @ 140hrs....hope my pump doesn't look that bad.....

[bogydave]

Only 100 hours? Got me scared....I am @ 140hrs....hope my pump doesn't look that bad.....

Not sure the hours
silty muddy water,
jet drive , sometime I pump some sand too.

Probably closer to 200
Working on getting a tack & hour meter installed

Pays to check it.
I got lucky.

[99yam40]

Only 100 hours? Got me scared....I am @ 140hrs....hope my pump doesn't look that bad.....

Still no more info on your motor or where you are running

[TownsendsFJR1300]

Still no more info on your motor or where you are running

"captinRon" is the original poster with the pump issues...

[Sequoiha]

Thats the worst waterpump cup I have seen,, has to be sand to be worn like that.. Ill bet you the block is full of it as well..

[tidelee10]

Not sure the hours
silty muddy water,
jet drive , sometime I pump some sand too.

Probably closer to 200
Working on getting a tack & hour meter installed

Pays to check it.
I got lucky.

Oh OK....Thanks for the good pics......helps to see the parts and how they wear...
I will probably wait till 200+ hrs as long as it keeps a good stream going.

[99yam40]

Oh OK....Thanks for the good pics......helps to see the parts and how they wear...
I will probably wait till 200+ hrs as long as it keeps a good stream going.

Never hurts to drop lower and check things out every year.
Allows all the bolts and shafts to be cleaned up and lubed.
May keep you from writing about not being able to drop lower unit some time in the future

[tidelee10]

Never hurts to drop lower and check things out every year.
Allows all the bolts and shafts to be cleaned up and lubed.
May keep you from writing about not being able to drop lower unit some time in the future

Good point!!! I will do that... any recommendations for lubricating the threads.. like anti sieze or marine grease?

[bogydave]

Never hurts to drop lower and check things out every year.
Allows all the bolts and shafts to be cleaned up and lubed.
May keep you from writing about not being able to drop lower unit some time in the future

+1
Anti-seize on the bolts too.

[robert graham]

Good point!!! I will do that... any recommendations for lubricating the threads.. like anti sieze or marine grease?

I use Quicksilver 2-4-C Marine grease on bolt threads....

[99yam40]

Good point!!! I will do that... any recommendations for lubricating the threads.. like anti sieze or marine grease?

Stay with what Yamaha recommends in service manual

Stay way away from anti seize that has any copper in it,
aluminum and copper do not get along

[bogydave]

Thats the worst waterpump cup I have seen,, has to be sand to be worn like that.. Ill bet you the block is full of it as well..

Yea
I pump some sand.
pump glacier silt & sandy water 99% of the time.
Sometimes gravel too.
Old jet drive foot. Not my damage.
I replaced the foot, got it welded & semi straightened up for a spare.

Gotta be Yamaha tough to run rivers in Alaska