[PUP] Bilge pumps (was Diesel electric)

[Truelove39 at aol.com]

Hi  Scott -
 
I'm  not familiar with these turbine pumps of which you write. Can you offer 
a link?  It sounds like you'd have to be underway (prop shaft turning) for 
this to work -  is that right?
 
Most commercial  boats have a positive-displacement main engine-driven bilge 
pump and that's been  my preference. Ours is a 1-1/2" Jabsco belted to the 
front pulley. It has  an electric clutch actuated by a pneumatic bilge level 
switch; the switch can  also be engaged manually. It is normally lined up to take 
a suction on the  engine room bilge but can also be lined up on the V-berth 
bilge - that's a  watertight compartment on our boat. That forward compartment 
has an audible  and visual alarm at the helm. The downside of a 
non-positive-displacement  pump of course is that they are not self-priming and therefore not 
very good at  pumping bilges unless submerged. 
 
In addition to a Rule 3700 submersible and a Jabsco diaphragm pump, our  main 
engine's raw water pump (Jabsco) is also capable of de-watering the ER  
bilge. As if that weren't enough, we also have the  mandatory Armstrong-powered 
Whale Gusher. 
 
Regards,
 
John
"Seahorse"
 
 

> Another thing to attach to the shaft is a turbine style pump and  shroud 
that
will evacuate the water from a flooding bilge.  I believe  these are very
cost effective and as long as the engine is making RPM's it  will move a
tremendous amount of water out of a hull.  I've heard the  only downside is a
whirring noise that's always present as the turbine blades  spin in the open
cavity.   




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