how can i tell what lower unit i have

[okbayliner]

i have a 1990 force 90 hp outboard 906x90c model # 906x90c.I got a new impeller that i ordered online but was a little to big so i went to a store thay gave me the same one went back with lower unit then got the right one. Now i need to replace the seal around the drive shaft but dont know what to get and dont want to get wrong one

 

[Frank Acampora]

Re: how can i tell what lower unit i have

The 1990 lower unit was made in three versions: A, B, and C. However, all used the same size water pump impeller. It sounds like you have an earlier lower unit with the smaller (in height) impeller.

A photo of your lower unit would help.

 

[jerryjerry05]

Re: how can i tell what lower unit i have

F4305 seal
F69430 seal
F694305seal
F694961 retainer
There are 3 seals in the drive you have for your motor. The question is, is the drive original?
The first drive made for that year uses a different seal than the later models.
Yours if right uses the parts I listed.
Look on your drive and find any #s or codes.Take pics and show the drive and numbers and letters..
Is it leaking at the seals?? If not? Don't mess with it.

 

[okbayliner]

Re: how can i tell what lower unit i have

it has a one piece drive shaft the top of the water pump housing has 523060 on it trying to get pics up but not working

 

[Frank Acampora]

Re: how can i tell what lower unit i have

One piece drive shaft is earlier than 1989 and has the Force water pump. The later two piece drive shaft lower units used a Mercury water pump and the impeller, while the same diameter, was about 1/8 to 1/4 inch higher

 

[jerryjerry05]

Re: how can i tell what lower unit i have

You'll need to resize the pics to post.

 

[okbayliner]

Re: how can i tell what lower unit i have

looks like i found the right part thanks for the help

 

[jerryjerry05]

Re: how can i tell what lower unit i have

Tell us what you did??

 

[okbayliner]

Re: how can i tell what lower unit i have

the # 523060 on top of water pump is for 80's lower unit so going to try water seal for an 85 should work will update after I try it