I have a problem/question. What I have is a early 80's 7.5hp 4 stroke honda, it runs great. Starts on 1st or 2nd pull, runs until I push in the choke. It acts as a kill switch. If I put it in gear it will run with the choke in, but not long (10-15 min). Any ideas or thoughts would be helpful.I changed the thermostat, head gasket, intake gask,taken apart carb and completely cleaned all jets and valves.I can't think of anything else. On a budget so I thought I would ask here first. Thanks in advance for any ideas.