1979 90 hp. Merc. Waterpump help needed

[bigbill239]

I have never worked on boat motors except to change plugs and coils.Can anyone tell me how to change out the water pump and maybe send a link to a blow up picture with instructions. So a novice can do it.
Thanks
Bill

 

[ricksrster]

Re: 1979 90 hp. Merc. Waterpump help needed

You can get a water pump kit here at iboats marine store. A manual is very helpful. All you have to do is take off the lower unit. The water pump is bolted on the lower unit at the drive shaft. Unbolt the water pump cover and lift off cover. The impeller also slides up the drive shaft to remove. There is a key in the impeller and the drive shaft that keeps the impeller from slipping when spinning. don't loses the key. When you replace the impeller and gaskets from the kit reassemble the same way it was when you disassembled it.

 

[davebad22]

Re: 1979 90 hp. Merc. Waterpump help needed

bigbill, Here is a page that helped me when I did my first pump. Probably a little different for your motor but it gives you the basics.

good luck

http://www.brokeboats.com/newpump.html