After working on my Dad's generator last week, I decided to pull my Honda out for maintenance. It's an EM5000s, and hadn't been run in about a year. Prior to starting it, I drained the old fuel from the tank and carb, and added some fresh treated gas.
Using the choke, it started on the first pull and went right to "full throttle" (auto throttle off). Ran great, sounded great for about almost a minute. Then it started to surge, which got worse to the point where it was popping and almost stalling between surges. Pulling the choke out some helps, but obviously something isn't right. It seemed to run alright with auto throttle on (idle, no load).
Seems this is a common problem many people are having, with all brands. I've done a lot of searching and reading online, but everyone has their own theory and terminology when it comes to different parts (mixture screws/idle screws/pilot jet).
I'd like to eliminate all possibilities before I tear into the carb. I've already taken the plastic idle screw out (#1 in the photo), and removed the plastic pilot jet (#2) for inspection. The horizontal thru-hole in the jet is perfectly clean, and the o-ring on the end is in good shape. There is a hole in the bottom/end of the jet, but it doesn't seem to go anywhere. I gently inserted a small wire in the bottom end, it felt like it was tacky inside, but I didn't want to press too hard. The idle screw is exactly where it was before removing it, same number of turns out. Was wondering what the part labeled #3 is for. Is it something that can be removed and cleaned? If so, how does it come out? Would be great to know what the correct terminology is for each part.
Thanks again for any advice. I'd like to avoid doing anything drastic with this unit unless it's absolutely necessary... It may be 13 years older than my Dad's, but it was also about three times as expensive.