BILGE PUMP NEAR PROP

[Pauld]

I have a 2007 CB 35...with the Cummins 380 HP engine.

Although there is a bilge pump (the so-called "middle" pump) under the transmission that works well, the bilge area near the prop shaft log seems to be lower and some water accumulates.

My mechanic tells me that I should install a small bilge pump in that low area to keep water from splashing up on the aft part of the engine...which he says will eventually cause rust.

MY QUESTION - has anybody experienced this issue and/or has anybody installed a small bilge pump in that area?

Thank you in advance for your responses.

[jmfernan]

My 32+2 has two bilge pumps under the propeller shaft- a larger standard rule centrifugal pump forward and a PAR diaphragm pump aft close to the shaft seal/propeller. The diaphragm is mounted remotely (near steering cylinder base) and has a remote pickup that is small enough to fit well aft near the shaft seal. These pumps can run dry and do a good job picking up most water but need a pre-filter.

The shallow bilge aft (leaky hatches/gunnel top can contribute nuisance water) mean it doesn't take much to fling water around which is bad news. I recently pulled the motor (had a freshened 6LY2A-440 waiting) as it felt the effects of a wet bilge with suspect corrosion at the oil drain fitting in the pan and gear output shaft seal.

While I had the motor out I had a small bilge sump box installed under the shaft, large enough to hold the diaphragm pickup and a switch. Pic attached. Basically cut fiberglass and foam below, placed a small plywood box in the cavity, glass, gelcoat. This collects any nuisance water that gets in.

Joe
1999 32+2
Yanmar 6LY2A-440

[Nancy]

Pauld, yes, agreed, that keel bilge/pocket needs a pump. The 31TE and probably the 35TE share this design problem. Here's a thread with a great approach: viewtopic.php?f=5&t=13954&p=93930&hilit ... ump#p93930

We'll be adding a bilge pump to this area this year. Our mechanic has suggested a diaphragm pump with weighted pickup and a manual switch as the simplest approach. It's not as elegant as the thread above, but should do the trick.

[Jkraft]

Pauld, yes, agreed, that keel bilge/pocket needs a pump. The 31TE and probably the 35TE share this design problem. Here's a thread with a great approach: viewtopic.php?f=5&t=13954&p=93930&hilit ... ump#p93930

We'll be adding a bilge pump to this area this year. Our mechanic has suggested a diaphragm pump with weighted pickup and a manual switch as the simplest approach. It's not as elegant as the thread above, but should do the trick.

Not to mention, the seflo dry bilge is on backorder everywhere and has been for a while now. It is a sweet, low cost unit though

[Maogwaicat]

I just purchased the Seaflo dry bilge pump on Amazon, it is here. All that was available was the 24 Volt version so I also purchased a DC Converter 12v-24v. I think I paid total $180 for the kit. Now I need someone talented to install!