Assuming 100 hours per season ... it's my understanding that the outdrive
should be removed at 2 year intervals to grease the u-joints etc etc. So
while it's off, it makes sense to "break" the outdrive and replace the
impeller (which means you gotta also replace the gear lube). Having said
that, my understanding is that the newer impellers are better made than the
older ones, and should go for 4 years plus no problems. So my fall schedule
is ...
- each fall replace the gear lube
- each second fall remove the outdrive togrease u-joints etc etc
- each fourth fall, while the outdrive is off, split the outdrive and
replace the impeller

And about the outdrive removal and impeller replacement ... I have the
mechanic guy do that :-)

"BSCHNAUTZ" wrote in message
...
I have a boat that has been run in clean lake water for most of it's life.

I'm not really savy on lower end maintainence (yet) and the owner said he
put a
new water pump in the lower end this past spring.

how can you tell when it's time to replace the pump? should this be done
on a
yearly basis? I'm planning to use this boat not a whole lot through next
year,
but will give it a good running over holidays and three-day weekends.

I suppose what I'm asking is this: is there any specific time/hours for
pum
maintainence.

THANKS!
Tim