More problems, exhaust full of petrol

[Snails]

Sorry, I'm sure reasons for this must have been covered before but I cant find the topics

New engine, was running yesterday, left it an hour or so and then it wont start, sussed the reason - cos its lost half a tank of petrol into the exhaust. Its a phbh rubber mounted carb. Why would it do this? Never used this set up before so go easy on me

[Speed Demon]

Float needle valve leaking in carb or float stuck. If it has a black tip it's possible been eaten by ethanol content in modern fuel. Red-tipped (viton) ones are better.

[Snails]

Oh yeah that old chestnut. It's black - so thinking could swap with a red from my jetex. Any difference?

[sean brady scooters]

check also that the floats are not perferated (full of fuel ) ...its not uncommon !

[sean brady scooters]

Oh yeah that old chestnut. It's black - so thinking could swap with a red from my jetex. Any difference?

size wise yes for sure !

[Snails]

That's yes there is a difference? Or yes I can swap?

[Speed Demon]

Yes there is a difference. PHBH type have needles matched to the valve seat size. Various valve seat sizes are available.

[Snails]

Thanks. I will go purchase one tomorrow

Don't think the float is holed but good suggestion

[Speed Demon]

Thanks. I will go purchase one tomorrow

Don't think the float is holed but good suggestion

Make a note of the seat size. Often sold as a set of: seat, needle and fibre washer.

[Snails]

Thanks I have no idea what the seat is - I'll take the whole carb