Adhesive for sticking down bilge pump

[ghostlymoron]

My existing bilge pump has bust - the delivery spigot broke off. It is now removed having been glued (Sika'd?) to the bilge floor.
Question is how should I fix the new one? and how do I remove the bed of old adhesive that it was stuck to? On reflection I don't think it was Sika because it is off-white and very hard.

 

[philmayfield]

The bilge pump body will probably be polyethylene which is not easy to glue satisfactorily. Why not screw it to a thin piece of wood and epoxy this to the bilge floor. If the old adhesive is very hard just grind it off.

Phil

 

[GrowingLad]

2nd that. It's exactly as you describe on my boat.

 

[BrianH]

The installation instructions for my Johnson pump recommended exactly this - bolt pump base to piece of marine plywood, then stick down; I used epoxy paste.

I did worry about the plywood, which, with the incorporated level sensor/switch being in the pump, would be in a little standing water some of the time (I have a deep bilge sump), so I soaked the wood well in preservative and allowed to dry before installing.

 

[ghostlymoron]

Thanks guys and Happy boating New Year

 

[dockmaster]

Mine is screwed down - but be careful not to drill to deep!

 

[PeterGibbs]

For the simplest fixing with the pump base as low as possible why not locate a couple of short fat screws either side of the housing and make fast by installing a thick cable tie over it.

Don't be too aggressive with the old sealant - a blunt screwdriver and a gentle tap should remove most of it.

PWG