Originally Posted by tekenaar
. . . you can get to it with a 3/8" ratchet, short extension and a 17mm "crowfoot", if memory serves . . .

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well, i ended up taking the carb out which really helped. i just couldn't see going up through the bottom. i can get my hand on it easy enough but hard to get a tool in there. did you say it's 17mm? i've tried 18 mm and 3/4 to get the old one out but they didn't seem big enough.