Re: 1962 18hp Johnson Only Runs With Choke.

[David Stanton]

quote mstrader77:

I think I found the problem. I Another problem I gave myself was reversing the low and high needle settings. I just realized that the high needle is on the top and the low side is on the bottom. .

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I believe you had the needles right the first time – high on the bottom and low the top. Yes the bottom needle goes in where gas comes off the bottom to go up the side for idle, but if you look close you will see that bottom needle is really limiting how much gas goes up that center brass tube to the venturi in the center of the carb throat – that’s the high speed path. After gas goes up the passage in the side of the carb, it gets limited by the upper needle before passing into the carb throat through the small holes at the top of the throat for idle. It’s easy to get these things confused – I went through all that many years ago until I got it straight!
Dave