Author Topic: 500 starts hard once started it restarts good  (Read 1434 times)

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Offline jeff.lary

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Re: 500 starts hard once started it restarts good
« on: September 07, 2015, 02:21:03 pm »
Thanks for the responses any head is better than mine.
 Today it is 96* here and about 30* too hot for me ha ha. So I took the saw for a stroll onto the work bench. I took the carb off and replaced the impulse grommet it looked fine to me though. I also gave a close inspection to the intake boot , it looked fine so back into use it went .
 While there I took the carb all apart to give it a good cleaning. I discovered the atmospheric vent was facing the wrong way and when I took the cover off there was some fine saw dust inside on top of the diaphragm. Probably caused by the fan blowing dust into the atmospheric vent hole.
  I then took off the fuel pump side and the gaskets and diaphragm out as well. The inside of sides of the carb looked good under the gaskets and diaphragms. But I did want to check the metering lever height as I suspected it was low, and with the Walbro gauge in place I could see about 2mm of light between the lever and the gauge. So I took the lever and spring out and checked the needle as well,and I found a pretty good ring / indenture in the rubber tip time for a new one !
  Now I put in a new needle and reset the metering lever height by bending the arm up about 2mm and the gauge liked that much better. I put the saw all back together and it started on the first pull. I don't know if that will happen next time but for now it seems much better.

 

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