Hi all. Suspect im getting a small amount of petrol into the sump, split fuel pump diaphram. Has anyone else any experience of this?
Thanks Paul

Check your choke......if t gets left 'on' after a short fire up, it can drip fuel down the carb.
More likely a split diaphram tho.....but worth checking!

When I read the title, I as going to say head gasket............

[6 Pots...stuff your bhp, torque is king]

Paul, yes, most probably a knackered fuel pump. You'll need to change it and do an oil change asap.

I had a problem with too much pressure in the fuel lines due to a faulty vaccuum valve on the fuel tank and it was pressurrising the lines - too much pressure for the float valve in the carb to cope with (check that valve too) and the result was that the petrol just dribbled down the venturies and eventually found its way into the sump.

I had a problem with too much pressure in the fuel lines due to a faulty vaccuum valve on the fuel tank and it was pressurrising the lines - too much pressure for the float valve in the carb to cope with (check that valve too) and the result was that the petrol just dribbled down the venturies and eventually found its way into the sump.

What's a vacuum valve?

Sorry - meant Breather valve

The little one you put on your tank to make sure that you don`t have a vaccuum forming as petrol empties out and the space is not replenished with air

Sorry - meant Breather valve

The little one you put on your tank to make sure that you don`t have a vaccuum forming as petrol empties out and the space is not replenished with air

Ah...too high tech for me, I've just got a pin-hole in my filler cap.

Thanks all. Replacement expected tomorrow.,

Check that they send you the correct one for your length of pushrod, just sayin'm

I will check, thanks