So I have my go kart going now and when I drive it I have to literally slam on the brakes to get it to even slow down. I think the problem is the throttle butterfly. (its a 6.5hp harbor freight engine). When im messing with it while i have the drive tire off the ground I can see that when it accelerates and then let off the acceleration the butterfly takes a very long time to go back to touching the screw. It sometimes doesnt even go back to touching the screw all together. I can "close" the butterfly manually but then the engine shuts off. Really confused here. The only thought i have is to run a spring from the butterfly so that it forces the buttfly against the spring as soon as i release the throttle. Any help would be apreciated!!!
Throttle butterfly problems
- Thread starter bpred
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Doc Sprocket
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Let's start with the basics, here. You've got a 6.5 clone. Is the governor intact, bypassed, or removed? Secondly, if all the factory governor stuff is there, make sure the hand throttle has been loosened off to the point that it can move quite freely. Another thing worth noting is that I ran into a similar problem with my chinese 4hp- I found that the throttle would hang up a bit when returning to idle and that was solved with a spring attached to the hand throttle. Since the governor was intact all the original linkages were there including the original hand throttle.
It will be worth your time to put it up on stands and play with the throttle linkages for awhile to see where the issue is. Make sure everything is sufficiently lubed and you have return springs where necessary.
It will be worth your time to put it up on stands and play with the throttle linkages for awhile to see where the issue is. Make sure everything is sufficiently lubed and you have return springs where necessary.
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