16-01-2019, 11:35 AM
(16-01-2019, 11:30 AM)Robert Leigh Wrote:(16-01-2019, 11:14 AM)DaveT Wrote: Well I nearly had a fire yesterday when the float in my 26va carb decided to sink so allowing the pump to work overtime and push petrol out of every orifice on the carb.I have heard that modern petrol attacks some solders, so possibly this is the reason for your problem. I suggest that you work in the open air and heat the float with a hair dryer or fan heater. When petrol appears turn the float so that the leak is at the bottom, and keep it that way until drips stop. You are best to let it cool after that then repeat the process until you don't get any more drips. At that stage the float will contain air and petrol vapour, so I suggest repeating the process of cooling and heating a few times which will reduce the proportion of petrol vapour. Then you can practice your soldering skills at the leak point. With soldering cleanliness is next to godliness, and keep the amount of solder to a minimum or you will exceed the 13 gm target weight. Good luck! If you are still in trouble I will sell you another float, but I can't guarantee its life!
When I took the float out you could hear the petrol sloshing inside so I weighed it at 30 gms whereas an empty float is 13 gms.
Question is where can I get a new float from as they don't seem to be listed in the spares lists of the usual suppliers.
Also how would I go about finding the leak and repairing it as for obvious reasons I don't want to apply any heat to the solder on the bottom and I can not see any bubbles when it's sunk in a jug of water.
The petrol also managed to remove the majority of the paint off the plate above the exhaust, better than nitromors.
Any suggestions gratefully received.
Dave
Robert Leigh
Sounds good to me. I'd have thought you could get another carb for £28!