Reluctant to start (it always does very easilly!!!) first thing, it did after about 10 seconds and was then ok. Fuel gauge has always been a bit iffy so it was no supprise to "use" over 1/4 of a tank for 60 miles.
Next day it would not start, many pushes on the priming button later it did start sort of. It didnt want to run and was "flat". It has a Bosch pump.
Pinhole in metal fuel line no.
Filter head u/s no.
Remembering it's a Bosch pump, leak off pipes no.
Getting desperate now fuel heater. no.
Clue 20 seconds running = very large pool of fuel running off rear of sump not far from fuel heater.
Realy start to panic now seal on front of pump soaked timing belt etc. no.
Fuel melting tarmac not popular.
Had stopped engine with cut off lever on pump. Heard a whistle that died away.
OK tell you what it was, the throttle spindle and bush on the pump had given up, it was leaking and the fuel was squirting towards the engine block, down the face of the block to the sump flange, round the corner to the rear of the sump and downwards. The throttle shaft had some wear on it but the bush was shot being egg shaped to say the least. It would only leak when in a certain position, about 1/3 open.
I can only say its a BX and why it apeared to be OK one day and develop a heavy leak the next I dont know.
As an aside Bosch pumps seem to be made of gold as the price of a couple of second hand ones, were priced at £450-00 EACH from a dealer in scrap (or should that be crap.)
So give your thing a wiggle now and again, it could be worth it.
Cheers.
Geoff