Fitting new Wema sender

[xpertski]

Hi all!

I would like to fit a new Wema sender unit to my new plastic fuel tank. Replacing the existing level arm one is a bit dicey as it’s been bonded to the tank not screwed. In order to fit the Wema I need to cut a new hole for the sender to drop through.

I am told I need a fitting kit (below) which is on its way, but naturally the retailer and tank manufacturer are nervous of advising cutting any holes in the tank. Two main pitfalls seem to be potential debris from cutting the holes falling into the tank (if they do how to get out), and the other being the potential leaking from new screw holes.

Has anyone fitted a Wema by cutting a new hole in the tank and any advice, pitfalls - products (gasket sealant?)

Thanks in advance

[paulbrown22]

If it's a plastic tank, is it portable, or can you remove it from inside the console, etc.? If so, presumably no major issue with removing any debris/swarf either with some thorough cleaning, using a hoover, etc.?

Could you not just use some standard fuel resistant gasket type sealant, e.g. Hylomar, Permatex, etc.?

I replaced the Wema sender on my little TomKat RIB earlier this year, would have to go and look in the console again but I thought it was mounted to a similar flange screwed on to the tank.

[GuyC]

You could have a look at the Tek Tanks catalogue for ideas.

https://www.tek-tanks.com/catalogue-price-list/

[xpertski]

Originally Posted by paulbrown22

If it's a plastic tank, is it portable, or can you remove it from inside the console, etc.? If so, presumably no major issue with removing any debris/swarf either with some thorough cleaning, using a hoover, etc.?

Could you not just use some standard fuel resistant gasket type sealant, e.g. Hylomar, Permatex, etc.?

I replaced the Wema sender on my little TomKat RIB earlier this year, would have to go and look in the console again but I thought it was mounted to a similar flange screwed on to the tank.

Hi there, thanks for your reply. The tank is a 207 litre plastic tank, it goes inside the console but is not removable once it’s fitted. I thought about hoovering inside the tank followings cutting as you mention with the difficulty being that the hole cut is unlikely big enough for the nozzle. I could cut the hole upside down to get the debris to fall out when cutting and then perhaps wash out with water and allow to air dry.

The tank manufacturer think the current sender may turn and come out that way then swap over, though it is possibly bonded so hopefully that wouldn’t cause damage - it’s why I thought perhaps cutting a new hole might be safer