1975 johnson 40 low speed needle setting

J

julianss

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Jun 5, 2011
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hello,buy adjusting the low speed needle in, the one with the big knob on to make the revs rise is this making the engine leaner or richer.or should i leave it just before the point where the revs rise.many thanks julian
 
oldcatamount

oldcatamount

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Apr 4, 2010
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Re: 1975 johnson 40 low speed needle setting

When turning either, high speed or low speed needle valves "in" (clockwise), you are decreasing the fuel flow (ie: lean). A ballpark setting for the low speed is 1 1/2 turns out (after lightly seating) and the high speed is rarely more than one full turn out.
 
J

julianss

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Jun 5, 2011
Messages
4
Re: 1975 johnson 40 low speed needle setting

Thanks mate for the info,on mine i dont think you can adjust the high speed needle,i'll leave the low speed at 1 1/2 turns to be safe.cheerz mate
 
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