Auto bilge pump wont shut down

scoutabout

Lieutenant Commander
Joined
Oct 14, 2006
Messages
1,568
Yes, I thought the problem would be crap wedged under the float too - but this pump works in a way I'm not familiar with.

Its a Rule - Mate 500 gph of an oval design. When you pull it out of its base you see that one side of the oval housing has the impeller in it, the other has a chamber containing a small platic box, slightly smaller than a wooden match box. Something inside the box rattles and the box itself isn't attached to anything -- it just sits.

I'm assuming this is the float and when it rises to touch the top of the chamber, it somehow completes a circuit and starts the pump. There are no metal contacts anywhere inside this chamber, it's plastic on all sides. Perhaps a magnet inside the box pulls thin contacts together inside the sealed motor casing when it touches it?

Anyway, if I simulate water in the bilge by pouring a couple of buckets down the pump will kick on, eject all the water, but keep running even after the float falls. I have to pull the fuse to get it to stop.

When I replace the fuse later, the pump sometimes stays off (until I test it again) or comes on immediately. It's a complete crap shoot.

The motor compartment seems to be permanently sealed, leaving the only access the impeller and aforementioned float (which can be completely removed without shutting down the pump).

Ideas? Anyone experience this before and solve it? I'm assuming I could break the seal on the compartment and glue it up again but wanted an idea of what I might be up against in there.

The other challenge of course is those cursed people who wired my boat at the Scout factory. Damn harness is tightly wrapped, secured with ties every few inches, and generally so well installed just getting the pump out to work on will be a project. ;-)
 

Boatin Bob

Lieutenant Commander
Joined
Sep 24, 2001
Messages
1,858
Re: Auto bilge pump wont shut down

Personally I would just chuck it and replace with new, most folks expect to replace bilge pumps every few years anyway. You could put in a style that uses a separate float switch rather than combined unit. Would you feel 100% sure with this one now that it won't stick on while your away and either burn up or kill the battery?
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,970
Re: Auto bilge pump wont shut down

Ayuh,......... It sounds like it's Broken to Me Too.........

Time for a Replacement,.... Even an Upgrade might be in order.....
 

Scout Sport Fish

Petty Officer 2nd Class
Joined
Apr 23, 2007
Messages
197
Re: Auto bilge pump wont shut down

Did you just install it? I rember the first time I tried to install it I wired it wrong so it would constantly stay on.
 

scoutabout

Lieutenant Commander
Joined
Oct 14, 2006
Messages
1,568
Re: Auto bilge pump wont shut down

Did you just install it? I rember the first time I tried to install it I wired it wrong so it would constantly stay on.

Nope -- it's a factory installed pump in a 2004 hull that has only 24 hours on it. Now, I know electrics hate just sitting as much as overuse but I'm surprised it's giving me problems.

I'll probably buy another as a spare but my Alberta farm boy father-in-law would kick my butt if I didn't at least try to fix it. Man, he doesn't let anything die without a fight. Told me once his own dad would weld teeth back onto stripped cogs down home in the bad ol days.
 
Top