Scooterotica

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

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.

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

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

Snails wrote: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 !

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

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

Thanks. I will go purchase one tomorrow

Don't think the float is holed but good suggestion

Snails wrote: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.

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