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Hello, I just bought a "new" boat. It has a 2 stroke johnson 40hp on it. It's an old engine 1974 There is a selector switch on the front of it just below the cover that says slow speed. And I think just two positions, L and R. I cant figure out what it is. I looked on a parts book and it says that the linkage on it connects to a slow speed needle valve. Anybody tell me what it's for, and how to use it. Thanks for the help.
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If you go to the iboats forums and post this question under evinrude/johnson you will get a good response. And they will be able to help with any other motor questions you might have.
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My 1974 Evinrude has the same valve. That selector valve means rich and lean and is used to slow your motor down so it will troll as slow as possible. At different altitudes you might need to turn the valve to rich other places lean to get the lower speeds. By the way, Evinrude and Johnson are basically the same motor.
WH2
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Oh, Ok, now it seems so obvious, lean and rich. Thanks man.
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No problem, by the way, welcome to the site. WH2
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