I just inherited a ryobi 31cc weedeater, it had been sitting for 5 years in my uncles garage, I changed out all the fuel lines, and it ran for about 30 minutes then died, I checked and there it is not firing, also checked the kill switch it looks ok, any ideas

https://video.search.yahoo.com/search/video?fr=mcafee&ei=UTF-8&p=ryobi+31c+weedeater+will+not+idle&type=E211US1494G0#id=1&vid=3a28cd20d10b0a98f6fa51d97cea0dfc&action=click
This site will show you how to adjust the carb idle.

need to relace the prime line with a longer line...

The gap for the Weed Eater 20cc engine can be set @ .025". The larger engine Ryobi 31cc/32cc class can be set @ .030" Either engine would operate within that .005" range and I know a 32cc Poulan calls for a .030" gap.

The primer bulb sucks fuel from the tank to the carb. When the carb has enough fuel the remainder is sent back to the tank. When you replaced the fuel line did you use the exact length of line and did you re-install the filter. On some of the trimmers the filter is weighted and holds the line in the fuel. Good luck...Lee

Typical fuel line routing is:

One line (the one with the fuel filter in the end of it) comes out of the fuel tank and goes to the bottom fitting on the carburator. The second line comes out of the tank and goes to the bottom fitting on the primer bulb. The third section of line goes from the top fitting on primer bulb to top fitting on the carburator. Hope this helped and best wishes.

I have a ryobi doule line bought in 1997..Had same problem put new gas cap on and problem solved..could not get air in....

spary a little startingfluid in carb to see if it start if it start rebuild carb.to change fuel line
only if there dryrotted if it go thourght the gastank in little hold cut new line on a angle and thread through hold.hope helps you.let me know ok

I believe there are four phillips headed bolts around the outside edge of the housing

Eight years is great for a weedeater! Blowing out can mean something is stuck in the reed valves, or one may be broken. They are just under the carb, usually. Be real careful with the gaskets. If you mess up any, silicone will do. Use good car gasket silicone.

I have a Ryobi 31cc 17inch cut with gas line problems and this answered my questions. Thank You
R Green