Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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During the times when your right cylinder is not working properly, have you checked to see if you are getting spark to your spark plug, on that cylinder, during those times?
This is only a troubleshooting question. We need to determine to you are loosing spark on that cylinder.
Thank you for this information. Now that your engine stop diode is new, it is very likely that your ignition coil is at fault.
We can assume that your ignition switch, and safety switches are all okay, due to the fact that your left cylinder is working. If one of these parts were faulty, both cylinders would be affected.
Did you work with someone else on this site, before you and I started?
I always prefer to troubleshoot, and find the solution, before recommending the purchase of new parts. Based upon what you and I have covered, it is very likely that your ignition coil is at fault. You have already replaced your engine stop diode.
We can continue from here. Keep in mind that your satisfaction is very important to me. Please keep me posted. Thanks!