Following on from previous post checked low pressure pump working it seemed to be decided to have a look at sender unit in tank loosens nuts off but could only get it out a few inches wanted to try and see if any pipes had somehow split all looked OK after a bit of pushing & shaking about eventually got it all back in started her up .... All is good now no air/frothing in fuel is there maybe a filter of sorts on the sender unit/pump bit ? I have been running fuel level a bit low lately and using supermarket fuel wonder if that's caused a blockage and me shaking unit about dislodged it ? Here's hoping it's been a cheap fix !

Could have been a bit of in the bottom of the tank which you dislodged. There is nothing that can't be fixed with a hammer😜😜
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I have just seen your update, thank you