liamo Posted March 20, 2013 Share Posted March 20, 2013 (edited) Hello. i have a 77 manta b 1.9 s, it starts straight away when cold or if i switch off and on again quickly no problem either. seems to be when its hot and left rest for maybe 15 / 30 minutes, it turns for a longer time before starting, everything is in good order and it runs fine. any advice appreciated. Thanks. Its got a zenith carburretor with automatic choke, is it possible to convert this carburretor to manual choke ?. Edited March 27, 2013 by liamo Quote Link to comment Share on other sites More sharing options...
spiney_norman Posted March 20, 2013 Share Posted March 20, 2013 That used to happen on my old Sportshatch. I never did find out what it was but I always suspected either petrol evaporating out of the carb or slightly low compression when hot. Quote Link to comment Share on other sites More sharing options...
tony g Posted March 21, 2013 Share Posted March 21, 2013 Most likely fuel evap as mentioned. try giving the throttle 5 or 6 pumps before starting warm and see if it helps. Tony Quote Link to comment Share on other sites More sharing options...
dynamytedan Posted March 26, 2013 Share Posted March 26, 2013 what kind of choke to they have ? my old varajet2 had an electric (bimetallic spring) automatic choke . It played up like that also for hot starts ... went over to manual and never looked back . it could be that it needs a little choke in those instances to help pull more fuel in initially and the auto bit isn't allowing it . might be worth having a look at choke position when your getting the trouble , Ive heard of people pulling the choke out after every journey to stop evaporation, dont know if that works / i guess you cant if its auto choke . Quote Link to comment Share on other sites More sharing options...
Paul Barrett Posted March 27, 2013 Share Posted March 27, 2013 mine does that too, its fuel evap deffo. kinda learned to live with it lol, as it runs lovely Quote Link to comment Share on other sites More sharing options...
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