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Post by Deleted on Jun 9, 2013 11:03:08 GMT -5
Holding the carb and moving the throttle linkage I see the full range of the linkage pushing down on the pump. I noticed that near the WOT position the pump actually raises up slightly? Ive seen this on both of the carbs I have. Why does it do that? Seems like 3/4 throttle would then be WOT>
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Post by indymoped on Jun 9, 2013 11:38:21 GMT -5
It pushes down at about 2/3 to 3/4 throttle to give it an extra squirt of gas for when you gun the throttle. So when you go WOT your going past that point and it's still getting the extra boost. It doesn't make 3/4 throttle WOT tho.
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Post by Deleted on Jun 9, 2013 12:51:06 GMT -5
I guess it does open the plate fully though letting in max air, but no wonder we run lean at WOT if the pump lets up and lets max air in  |
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Post by wilds on Jun 9, 2013 13:43:39 GMT -5
The pump is manual and is only ment to give you a little extra squirt of fuel upon accelleration. WOT doesn't = accelleration.  Running lean at WOT has nothing to do with the acc. pump. If you run lean you should change the main jet. |
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Post by indymoped on Jun 9, 2013 15:32:50 GMT -5
Oh ok. Your thinking that the accelerator pump is always adding extra fuel but it is not. Like Wilds said in his above post, The pump only gives you extra fuel when you twist the throttle and the pump plunger is depressed. Once you have passed this point it no longer does anything.
If you are running lean you need to up-jet. My scoots normally run on the rich side. Its much better than being lean
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