water pump on 1988 40 HP Nissan

G

Gamble

Cadet
Joined
Apr 11, 2008
Messages
10
fixing to install a new impeller.........old one is still working, but could use a new one.........don't know how old the one in there is.........is are any tip I should know about before I attempt this? Thanks for the help.
 
pvanv

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,509
Re: water pump on 1988 40 HP Nissan

Pretty straightforward job; Disengage shifter, drop LU, unbolt pump (don't lose drive key for impeller), replace parts as needed.

I would make 3 recommendations:

1 - Get a service manual from any dealer (labor cost saved on the w/p job alone will pay for it, and the job will go faster/easier.
2 - Install a water pump kit instead of just the impeller. Same labor, and replaces worn plate and cup along with the impeller.
3 - At this motor age (20+ years), verify and/or replace LU seals while the LU is down. If replacing seals, don't ignore the shifter o-rings.
 
G

Gamble

Cadet
Joined
Apr 11, 2008
Messages
10
Re: water pump on 1988 40 HP Nissan

Hey thanks for the reply, I appreciate it........prolly gonna tackle it in the next few weeks.........I'll post up w/any more questions!
 
H

honeybunny

Recruit
Joined
Jul 31, 2011
Messages
2
Re: water pump on 1988 40 HP Nissan

how do i disengage the shifter rod so the lower unit drops?
 
pvanv

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,509
Re: water pump on 1988 40 HP Nissan

Drive out the lower ss roll pin from the shift rod coupler. See your Factory service manual, available from any dealer, including me.
 
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