Posted by Chris Case [107.194.26.164] on Wednesday, September 25, 2013 at 15:25:09 :
In Reply to: Accelerator pump explanation? posted by Sterling Luttrell [99.58.180.94] on Wednesday, September 25, 2013 at 11:57:25 :
When you stomp on the gas, the throttle butterfly opens, and the engine gets a big gulp of air. But the vacuum operated computer called a carburetor can't respond that fast, so the accelerator pump gives a squirt of gas.
Te linkage adjusts when and the total amount of squirt. Reaming out the nozzle itself will give a faster shot.
It does nothing at idle, it only works when you stomp. Symptom a a bad one will be a bog, hesitation, or delay when you hit the gas. It also gives a shot when you 'pump the gas' before starting when cold. That is to assist the choke.
It is NOT your idle problem, nor you low power at high speed prob.
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