Posted by George Marsh on September 14, 2014 at 06:47:21 from (50.121.45.180):
I have a 20 hp kohler command, ch20-64519. It runs just fine, a little on the rich side. I have 1500+ hours on it, doesn't use oil, starts good, no issues other than running a tiny rich which shows up on sprak plug.
Been experimenting with blending my own E17.5 to lean engine down, which is working well. Then someone gave me heck, saying I could change main jets and get the job done. That is easier said than done. I've yet to find a source to buy any jets. No tech source to find what jet goes with my engine. However I did find carb rebuild kits that show an adjustable idle jet, which mine clearly doesn't have. I can see places where the jet was located, but blocked off. I've also learned that Kohler has a specific model number for engines on different applications.
1. So what makes the kohler command different from the other kohlers?
2. I'm guessing the older kohler engines had carbs with adjustable jets? So When did the epa require epa approved carbs? That would give some idea how far back I need to go to find an old used carb. However all I can find are the newer carbs. Thanks, George
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