MR 1200 Posted November 19, 2009 Share Posted November 19, 2009 Can anyone help please?My herald won't run after adjusting the carb using the mixture screw, gunson played up. Is there a basic mixture screw setting on the B30 Solex carburetor just to get it running again?The carb is fairly new and the engine has done around 50,000 milesJohn Link to comment Share on other sites More sharing options...
Mark Hammond Posted November 19, 2009 Share Posted November 19, 2009 The answer is in the owners handbook. If you are stuck for the book, pm me and I'll scan/email you the relevant pages.Mark Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 19, 2009 Share Posted November 19, 2009 the mixture screw only controls the idle mixture if you open the throttle it should start and run at a fast idle , set the idle screw to just touch the throttle lever,turn it in 1.5 turns screw the mixture screw in till it just stops,back it out 2 turns is a good starting point if if wont idle there is the slow running jet screwed into the back face has hex and slotted head, with 45 stamped on it take it out and carefully clean the 0.45 small jet hole .screw it back tight .set idle to 500 rpm (quite slow) unscrew mixture screw till it hunts then screw in to give a best idle , slow the idle down again if this speeds thing up,re adjust the mixture again Peteand put a workshop manual on your Christmas wish list , always usefulTssc shop and others sell originals as books or CDroms Link to comment Share on other sites More sharing options...
MR 1200 Posted November 20, 2009 Author Share Posted November 20, 2009 Thanks gents very helpful, I'll have a look at it over the weekendJohn :) Link to comment Share on other sites More sharing options...
heraldhabitat Posted November 21, 2009 Share Posted November 21, 2009 I have a couple of herald manuals for sale for not too much (Haynes) let me know if you need one. Link to comment Share on other sites More sharing options...
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