Matt306 Posted June 25, 2018 Share Posted June 25, 2018 Right the Spit rebuild has reached , the new oil, new plugs, new Antifreeze, rebuilt carbs reattached to engine, Oil pressure guage attached type stage. This means i got some petrol to have a go and start her up... she starts oil pressure at smidge over 50psi when cold so not too bad. Petrol flowing through that brand new kunifer pipe and hose. However the top of the float chambers are collecting fuel, i have checked the hose clips etc and all tight. I assume the floats are not shutting properly, however new float valves and seats are fitted, and when pressed up it stop me blowing on the in pipe. The Haynes talks of bending up a metal tab to ensure 1/8" gap but i dont have any metal tabs on the top of the float, (its not holed i should mention). I looked on Rimmers and Paddocks and new floats are sold with not metal tabs, both float bowls are the same. Am i missing a part when a float has been replaced? Quote Link to comment Share on other sites More sharing options...
RobPearce Posted June 25, 2018 Share Posted June 25, 2018 The metal tabs are on Strombergs. SUs have floats that operate directly on the valve. What fuel pump do you have? Some of them produce too much pressure and the valve can't cope. Also possible (actually common) is that you shaved a few flecks of rubber off the inside of the hoses and one of them is stopping the valve from fully closing. Quote Link to comment Share on other sites More sharing options...
Matt306 Posted June 25, 2018 Author Share Posted June 25, 2018 hmm I'll pull the floats off again Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted June 25, 2018 Share Posted June 25, 2018 Sounds like (as Rob says) you have something blocking the valve OR a pump that delivers too much pressure. Quote Link to comment Share on other sites More sharing options...
Hogie Posted June 26, 2018 Share Posted June 26, 2018 Hi Matt, not sure what carbs you have but on the HS6 you have to set a gap for the height of the float - should be in the manual. Roger Quote Link to comment Share on other sites More sharing options...
Dannyb Posted June 27, 2018 Share Posted June 27, 2018 If they are ALL plastic floats then the height is set by the washers under the valve. Although I have found the plastic ones are almost spot on so just the one washer is needed. Quote Link to comment Share on other sites More sharing options...
Dannyb Posted June 27, 2018 Share Posted June 27, 2018 I would look at the pressure the pump is putting out, if it was a new one as I have had problems with replacement pumps in the past. Quote Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 27, 2018 Share Posted June 27, 2018 i had a recurring flooding despite all attempts with new needle valves and even tried some grose valves that were more hopeless on examination of the platform the needle sits against with a magnifier you could detect a ridge had worn on the face, far from obvious to the normal eye this is enough to jam the needle new floats and problem has remained fully cured tried to fettle the face but the plastic tends to shread it gets worse the more you try. pete Quote Link to comment Share on other sites More sharing options...
Matt306 Posted June 27, 2018 Author Share Posted June 27, 2018 just an update took the needle valves out again blew through with air. The float valve had no copper washers so put one under each and no flooding. Quote Link to comment Share on other sites More sharing options...
Matt306 Posted June 27, 2018 Author Share Posted June 27, 2018 just an update took the needle valves out again blew through with air. The float valve had no copper washers so put one under each and no flooding. Quote Link to comment Share on other sites More sharing options...
Matt306 Posted June 27, 2018 Author Share Posted June 27, 2018 just an update took the needle valves out again blew through with air. The float valve had no copper washers so put one under each and no flooding. Quote Link to comment Share on other sites More sharing options...
Dannyb Posted June 27, 2018 Share Posted June 27, 2018 happy days Quote Link to comment Share on other sites More sharing options...
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