wont start when hot ?

[brianc]

hi,my lambretta gp 175 starts 2nd kick from cold,no problem,runs great then when its switched off and left for a few minuets it wont start again,stinks of petrol like its flooded,happened this morning ,had to sit and wait 20mins in the p1551ing rain,then the f---er went again,im switching the tap off and the fuel cap is breathing ok,
any sugestions welcome, brian.

[fastfrog]

electronic ignition? if so pick up's dead....

[brianc]

yes mate it does have electronic ignition,if the pickup is dead would it not run at all ?
brian.

[bristolmod]

when it won't start when its hot, do you have a spark anyway?

If yes, then its probably carb or rings or seals

If No- then its probably ignition side.

When it happens next time check out the spark and report back on here please

Chris

[brianc]

im pissed off with it at the moment,its a fully rebuilt motor with new 12v elec ign,next time I take it out il take some tools,
brian.

[brianc]

just went and had a look at it,now it wont start at all but it does have a good spark,
brian.

[bristolmod]

OK

carb- what carb is on there? jet / slide/ atomiser etc sizes etc

[brianc]

carb is a new jetex 22mm,dont know what sized jet,atomizer,need to take it off and check,
brian.

[GP240]

shouldn't really happen on a new carb (jettex) but.

check if the plastic float is moving properly, they have a tendency to rub on the side of the bowl or jam on the swivel pin.

[Daggs]

Two likelyhoods.
One you are screwing the throttle open on hot starts, causing flooding.
Or the pilot jet is oversized. Jetex will work with a 42, 43, 45 or even a 48. You need to find out which is best.