Drain some out of one of the bikes I thought, Bullet was up on the bench so pipe off and drain some into the can......or so I thought.
On main tank there was just a dribble and on reserve just a few drips, and this is with a nearly full tank.
Anyway perserved on main to get enough in the can to mow the lawns, all the while thinking why.
Took the tap out tonight filter gauze was floating around in the tank, and the tap partially blocked with something that looked like cloth fibres.
Dismantled the tap and cleaned it, also fished out the filer and re fitted it.
Nice healthy flow restored, but guess I'll have to drain the tank and see if there are more of the fibrous stuff in there.
Absolutley no idea what it was.
Wondering if perhaps the PO was having some issues with it running with the minimal / nearly non existent flow.
Had the mower not needed fuel I would never have thought of taking a look at the tap.