dehorridge Posted May 2, 2012 Share Posted May 2, 2012 So I have a F-200 with Wal 37 carb. Just fitted a tach so I thought I’d have a go at tuning it up. First problem, I can’t hold on to the bloody thing a full RPM. Still I managed to tweak the Low and High to point where it picked up nicely and pulled to over 6K rpm (more there if needed). All this was done purley by ear. I then ran it up to full revs (well 6K since that’s all I could hold) and killed the engine. Checked the plug and saw a nice coffee colour. Then I let it idle for a while and again another nice coffee colour, a little darker but still coffee colour I then counted the turns and they are High 1 turn out and Low ¾ turn out. This is about ¼ turn less then the manual states (H=1.25 and Low 1). Is this typical? Now the question I have is: Should I tweak these ¼ turn out and run it slightly rich or stick to my settings? BTW, it was running very rich when I got it. Lovely black plug Darrel Quote Link to comment Share on other sites More sharing options...
pete_b Posted May 2, 2012 Share Posted May 2, 2012 If your happy you have it right due to the plug colour then leave it, if you want to play it safe then tweek them out a bit more. The choice is yours Quote Link to comment Share on other sites More sharing options...
dehorridge Posted May 2, 2012 Author Share Posted May 2, 2012 Thanks Pete, think ill give an 1/8 turn on each and see what the plug is like. Better a little rich then melt down. Darrel Quote Link to comment Share on other sites More sharing options...
pete_b Posted May 3, 2012 Share Posted May 3, 2012 Any time Quote Link to comment Share on other sites More sharing options...
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