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69 Johnson 4hp exhaust question
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<blockquote data-quote="Pappy" data-source="post: 431020" data-attributes="member: 3278"><p><span style="font-size: 18px">Forgive me if this sounds unreasonable but how are you going to be able to listen to a video and understand it and not hear the engine well enough to tune it? </span></p><p><span style="font-size: 18px">In 1969 the high speed circuit is fixed so no tuning. </span></p><p><span style="font-size: 18px">The low speed adjustment needs to be set up with the packing nut tight enough so that the low speed needle will hold any adjustment. When at an idle turn that slow speed adjustment about 1/8 turn at a time clockwise. Let the adjustment take effect for about thirty seconds or so and make another one. You should hear or feel the engine speeding up. When your adjustments have made the engine idle at is fastest and now start to make it slow then back that adjustment up around 1/4 turn or so and that should be a good baseline adjustment for you. </span></p></blockquote><p></p>
[QUOTE="Pappy, post: 431020, member: 3278"] [size=5]Forgive me if this sounds unreasonable but how are you going to be able to listen to a video and understand it and not hear the engine well enough to tune it? In 1969 the high speed circuit is fixed so no tuning. The low speed adjustment needs to be set up with the packing nut tight enough so that the low speed needle will hold any adjustment. When at an idle turn that slow speed adjustment about 1/8 turn at a time clockwise. Let the adjustment take effect for about thirty seconds or so and make another one. You should hear or feel the engine speeding up. When your adjustments have made the engine idle at is fastest and now start to make it slow then back that adjustment up around 1/4 turn or so and that should be a good baseline adjustment for you. [/size] [/QUOTE]
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