[QUOTE=Pete7] Not sure how you are going to put a sender unit in a GRP tank and be able to ensure it doesn't leak or petrol seep into the laminate were the hole is cut. [/QUOTE
I have just been very close to my fuel system and tank having had fuel starvation symptoms.
Have replaced all pipes and looked in the tank. Didn't find any blockages or any crap in the tank so its still a mystery
On the Scorpion the fuel tank sender is fitted to the tank inspection plate. Both the tank and the inspection plate are GRP.
The sender is bolted in place with a gasket (rubber I think - I didnt take this off) and the threads sealed with minimal amounts of Blue Hylomar.
The inspection plate is bolted to the tank. Cork gasket and Blue Hylomar on the threads.
Doesn't leak, er well, it DIDN'T until I took it all apart last night. Hoping i've put it back together properly
As long as the edges of the GRP are sealed with the same fuel resistant resin that the inside of the tank is coated with there shouldn't be any problem with fuel wicking along the fibres. - Not sure exactly what the resin is though.