Quote:
Originally Posted by Moesbro
Thanks, I started it, and waited for it to stall, then immediately removed the fuel line from the carb, hit the button, and got no gas. So that’s making me think the pump is failing, or it’s drawing in lots of air from downstream. That nut on the bottom of the float bowl is hard to get to with a tool, with all the metal in the way. Thanks also to those responsible for locating the generator directly below the slide out, ouch!!
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A failing fuel pump is a common problem on the 4000. Your symptom of the pump not running immediately after a shutdown is exactly what I experienced. Fortunately, the fuel pump on the 5500 is a lot more accessable and easy to change out.
Others have covered dirty carbureators quite well, but on the altitude adjustment: This is very much the same as a mixture adjustment on other gas engines. Turning the screw counter clockwise lets makes the mixture richer and clockwise, leaner. The easy way to get it right is to hold a white rag or paper towel a couple inches from the exhaust pipe. If the mixture is too rich, you will see soot on the rag. Tighten the screw 1/8 turn at a time until there are no deposits on the rag. Wait at least 30 seconds before testing
after the new adjustment. When the rag stays clean, back off the screw a little and test again. Tighten only enough to have the rag stay clean.
Linear Mode
