fq-craigus Posted May 31, 2015 Posted May 31, 2015 Anyone got any tips on freeing up a siezed butterfly in a carburetor. Narrowed down my project bikes non start problem to the carbs being all gummed up, removed and cleaned but one of the butterfly valves is stuck solid.New to messing with carbs this is the first i have had the joy to work with so any do's and dont's will be handy. Ive had the float bowls off jets out, inspected diaphram cleaned all gummy fuel out thoroughly, but need to free this butterfly. Quote
Mr Fro Posted May 31, 2015 Posted May 31, 2015 Have you tried tapping the carb body and butterfly spindle (the ends) with a spanner? Either that or undo the screws that hold the butterfly to the spindle. I wouldn't be tempted to apply any force to the butterfly itself though. Quote
eastanglianbiker Posted June 1, 2015 Posted June 1, 2015 spray lots of penetrating fluid in each side of the butterfly valve on the inner side and outside leave to soak in then very slowly try and get it to move failing that you might need to remove the screws t hat hold the butterfly valve in on all the carbs and see if you can seperate it and dress it out to clean it up and rebuild it Quote
fq-craigus Posted June 1, 2015 Author Posted June 1, 2015 I left it penetrating yesterday and soaked again today, i will seperate the carbs and try the tapping method. Thanks guys. Ill have a crack at it maybe when i finish work if i can be bothered to stay behind after today Quote
mattycoops43 Posted June 1, 2015 Posted June 1, 2015 If it's the steel pivot seized in the alloy body, strip it completely and boil it in water for about 30 minutes, it will eat its way in between the alloy and steel and free it up. I have had success with this method in the past, but obviously it will leave it all full of water so will need thoroughly cleaning out. It will do it without damaging it though as it should come apart without being forced. Quote
fq-craigus Posted June 1, 2015 Author Posted June 1, 2015 Well success! I brought it home and cracked on with it in front of the box. Got all the siezed screws out and got them apart, its been soaking in pen oil all day, and as soon as i got a good purchase on the arm it went and now is lovely. Cleaned them up thoroughly and rebuilt, might go into work early and fit them back on the bike and see if it runs. Thanks for input guys, might not stray away from carbs in the future now Quote
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