wrote in message
...
I have a 1979 115hp Evinrude outboard. We're
trying to change the impeller. We removed a
bolt which held the top of a shaft in a bracket
in the top part of the motor, then removed 5
bolts from the lower end and tried to drop it down,
but it is stuck somehow. Can anyone offer any
advice on this, and/or know of a place online
where there's a diagram or explanation of how
to change an impeller?

Thank you for any help!
David

Get a service manual for the engine. There is an entire procedure to follow,
including the proper torque specifications for mounting the new or old water
pump. Too much pressure will either break the housing or cause premature
wear and/or failure of the pump. And as Don stated, there are many more
items to consider, including using 2-stroke oil or similar when installing
the impeller in the housing.

Your service manual should also show you the signs of wear in the impeller
and other related fixtures including the housing.