Questions:

What size boat do you have?

Do you trailer it or leave it in the water?

Is the pump running often? If so why? Usually only water from spray,
rain, or maybe a slow drip leak (as arround my drive shaft packing)
should be letting water into the boat.


Notes:

o Bilge pumps can & should be run whenever needed, whether underway, engine
on, or engine off.

o If you trailer the boat or otherwise take if out of the water when it's
not in use, a simple pump
with an On/Off switch that you manually control is sufficient.

o If the boat stays in the water unattended it's better to have a system
that can come on by itself.
The two ways most common to do that is a float switch that turns the pump
on or one of the
"computer" controlled pumps that come on every 20 seconds or so and then
stay on if they sense
they are pumping water.

o Either way, if you have a pump like the above, wire it direct to the
batter with an in-line fuse. In
other words, by-pass any main ON/OFF or A/B/ALL switch you have. This way
even if you
shut off the main switch the pump still works.

o Don't forget the in-line fuse if you wire direct to the battery.

o I also like to use di-electric grease when wiring to prevent corrosion.



They should be wired "direct" to the battery, with an in-line fuse.
o

"Ockmel" wrote in message
...

Should I only run my bilge pump when the engine is off...or can it run
safely when the boat is under power and running?


Bilge pumps can be run safely when the engine is running
and when the boat is moving. I don't know what you
think the problem might be with this. The electricity draw
is not a problem and the pumps are manufactured not
to create any electrical spark - if you're worried about
fumes in the bilge.


So far, I am using it only when the engine is not running but of
course it is probably draining my battery when I do so....





Andre