Following on from the previous discussion on this, tracked down to a blockage in the Fuel Tap/strainer assembly head.
On the MF25 this is a short-bowl, under the tank fitting. Original type replacements no longer available and newer types all have different thread fittings. Removed/dismantled assembly and blew through with compressed air, this cleared it. Previously flow into bowl just a drip, now two good streams from the nozzle. Also dismantled and blew through the tank cap, new gauze in strainers and new filter. Should be all good to go ! (Fingers Crossed!)
On the MF25 this is a short-bowl, under the tank fitting. Original type replacements no longer available and newer types all have different thread fittings. Removed/dismantled assembly and blew through with compressed air, this cleared it. Previously flow into bowl just a drip, now two good streams from the nozzle. Also dismantled and blew through the tank cap, new gauze in strainers and new filter. Should be all good to go ! (Fingers Crossed!)