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Early 90's 30hp evinrude
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<blockquote data-quote="DriftinMT09" data-source="post: 476407" data-attributes="member: 25834"><p>I have a 1990 Johnson 30hp, which is likely the same engine setup you have. My choke knob doesn't move a butterfly or a valve inside the carb, but rather seems to allow fuel to be pulled from the bowl and sucked into a small port in the top of the carb just before the throttle plate. </p><p></p><p>Either way, definitely sounds like you have a clogged or restricted carb port that won't give you the fuel necessary under your half or more throttle position. IF I know what I'm talking about, the main jet is in the bottom of the carb, accessible when the bowl is off. If I had to guess, that is plugged with sediment or scale.</p></blockquote><p></p>
[QUOTE="DriftinMT09, post: 476407, member: 25834"] I have a 1990 Johnson 30hp, which is likely the same engine setup you have. My choke knob doesn't move a butterfly or a valve inside the carb, but rather seems to allow fuel to be pulled from the bowl and sucked into a small port in the top of the carb just before the throttle plate. Either way, definitely sounds like you have a clogged or restricted carb port that won't give you the fuel necessary under your half or more throttle position. IF I know what I'm talking about, the main jet is in the bottom of the carb, accessible when the bowl is off. If I had to guess, that is plugged with sediment or scale. [/QUOTE]
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Early 90's 30hp evinrude
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