My porter cable generator md. bs500 run in choke prosition , but when put in run prosition it cut off

SOURCE: Brand new Porter cable 5500w 10 hp generator - no output

Hi,
I wrote an answer that was for powermate generators, but it should help you too. I think you have a brushless generator, and rather than the plastic endbell I mention in the post you have a metal pie plate held on by 2 phillips head screws (yours is easier to get to)

Rate me if this helps, ask directly if it isn't enough,
Carl

SOURCE: My porter cable generator 3000 wt will not stay running once star

Hi,
If this generator has been stored for any length of time with fuel in the carb you probably have a plugged main jet in the carb. As joboo1 says there are a few other things that could cause this behavior, but most often I see dirty carbs, water in the fuel, and plugged/dirty air filters. Get a flashlight and look into the fuel tank thru the filler hole, if you see anything floating in there you've got water in the fuel. Look at the ari cleaner, oil and fuel on the element indicate a dirty carb. Of course check the oil level. Lastly, take the bowl off the bottom of the carb (shut off the fuel valve first), if you see debris in there the carb needs a good cleaning.

Regards,
Carl

SOURCE: I have a porter cable 5250 generator that bounces off the governo

there 2 linkages that conect that would be the problem. you have on conected to the throttle switch that runs to the govener than on that govener os another linkage hooks up to it and runs to the carborator that ajusts the flow. if you don't have both linkages than you need to order 1.