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Carb float jamming after car sitting for extended period - Fuel System/Carbs - The Lotus Forums - Lotus Community Partner #ForTheOwners Jump to content


Carb float jamming after car sitting for extended period


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Just a note of caution.  After not driving my S1 Esprit for a few to many months due to Covid lockdowns I finally had a chance to drive it last weekend

The car started fine but then immediately started to run on only 2 cylinders so I turned it off to investigate.  When I got out there was a large pool of petrol spreading under the engine !!!! Luckily I could push the car away and mop up the petrol without incident

Investigations showed that the front Dellorto was flooding with fuel coming out the trumpets soon after the ignition turned on the fuel pump.  It was a relatively easy fix by just removing the carb top cover and cleaning the float valve and ensuring everything was moving smoothly.  I could see nothing wrong that could have cause the flooding and presume the float valve jammed open due to sitting for too long with the fuel evaporated out of the carb bowls.

After the carb fix the car needed new plugs and then ran rough until I filled it will fresh fuel.   It bought many smiles to be able to drive it again :)










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