It just started acting up at 1/4 throttle going through water and backing up ramps, I got a 170 jet, 2 inch snorkle, has run good for a while, took plug out it os black except for a 3 brown spots on plug, the a/f is 2 1/2 turns out did plug check on idle and it is good, just all of a sudden started acting up.
well i dont kow about the backing up ramps part but it could be electrical....i would dielectric grease the electrical connection underneath the rear right fender that could help also i would check the tps on the carb
get it idling and unplug each carb vent one at a time....i found that one of mine wasn't venting and when i unplugged it the sumbitch sounded fine, when i hooked it back it stalled out and sounded shitty.
so i need to get a bigger hose...
i also went from a 170 jet down to a 165. runs like a spotted ape now.
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