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need help with a 70's johnson 9.9
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<blockquote data-quote="KMixson" data-source="post: 37680" data-attributes="member: 432"><p>The dial on the front of the motor is the low speed needle adjustment knob. To adjust it you need to get the motor operating temperature in a test tank or on the water. Run in gear at around 700-750 RPM. Adjust it until the you reach the highest RPM and smoothest performance you can. You may have to wait 15 to 30 seconds for any change in RPM while adjusting so don't get too aggressive with the adjustment. After reaching the highest RPM and smoothest run, pull knob straight out, off the shaft and reposition it so that the tip on the dial is pointed down. If the low speed needle is way off you can close it and then open it about 1 1/4 turns to get to a starting point. After setting your low speed needle adjustment then you can adjust the idle speed adjustment on the port side to get an idle speed of around 600 RPM.</p></blockquote><p></p>
[QUOTE="KMixson, post: 37680, member: 432"] The dial on the front of the motor is the low speed needle adjustment knob. To adjust it you need to get the motor operating temperature in a test tank or on the water. Run in gear at around 700-750 RPM. Adjust it until the you reach the highest RPM and smoothest performance you can. You may have to wait 15 to 30 seconds for any change in RPM while adjusting so don't get too aggressive with the adjustment. After reaching the highest RPM and smoothest run, pull knob straight out, off the shaft and reposition it so that the tip on the dial is pointed down. If the low speed needle is way off you can close it and then open it about 1 1/4 turns to get to a starting point. After setting your low speed needle adjustment then you can adjust the idle speed adjustment on the port side to get an idle speed of around 600 RPM. [/QUOTE]
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need help with a 70's johnson 9.9
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