Just looking for some info from anyone who has run into this problem before.
I have a gx670 Honda engine in a 318 John Deere as a conversion. This was done about 5 years ago. This problem happened about 2 years ago when it started running on one cylinder and acting lean. New plugs and good spark. Pulled the carb apart and found some dirt in one of the main jets for the right bank. Cleaned and all went well. This happened again the other day so I pulled the carb apart cleaned it good but this time it acts the same way. The carb looks spotless and Needle valve and float seem good and set correct. I have never run into this before, ordered a rebuild kit and replacement idle screws. The carb is a Keihin BK01a/sj13 2 barrel carb.
The engine makes an attempt to run with the choke about 3/4 on but wants to back fire a little.
Any input would sure help!!!