What exactly does this knob do ? ('75 Evinrude 9.9)

Started by jgp12000, August 14, 2026, 02:56:39 PM

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jgp12000

August 14, 2026, 02:56:39 PM Last Edit: August 14, 2026, 02:58:08 PM by jgp12000
There is an Idle adjustment knob #38 that appears to move #40 so it presses against the fuel line to limit fuel flow? Is this how it works or am I missing something? Are there any Evinrude Gurus here I need to pick your brain ;D 

oldmanjoe

#1
August 14, 2026, 05:47:58 PM
 I would think that linkage comes in contact with the carburetor arm to adjust the idle .
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jtwill98

#2
August 14, 2026, 07:28:35 PM
I agree with Joe, it looks like an external idle adjuster.   

jgp12000

#3
August 15, 2026, 12:48:50 PM
I bought a 15hp carb on ebay ready to go, the guy told me the knob adjusts the throttle plate. I am going to rebuild the 9.9 hp carb just cause. 
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