went out to the shed & found the tank had droped about 5 liters of fuel
over the motor/shed floor from around where the pump bolted in...
I have had a few pump issues so it's been in/out a few times & the plastic threads in the tank were getting a bit floged out so didn't want to thighten
them to much in case they striped totaly...
So I have had to spin up a alloy ring to bolt to the tank that the pump
bolts to.... it has 6 bolts with washers/nyloc nuts on the inside of the tank to hold it.. with a O-ring to seal it to
the tank with 6mm O-rings around the bolts...." and sealant to be safe"
the rings... 135mm OD / 84mm ID / 6mm think....
So theres one way to fix it if anyone ealse has the same prob some time...
now have a really true surface for the pump to seal on...