Hi, New member here.I have an 84 Honda 200ES Big Red that we bought new.Used the machine on a dairy farm in Washington state.Machine is still in very good condition but doesn't get driven very much.When we do run the rig it starts great but wants to foul the plug.I have had it into several repair shops and it checks out fine,good compression,clean carberator,clean fuel,etc.The first 15 years it ran perfect.We have been told that these machines are noted for this problem.Any and all insite to this post would be greatly appreciated.Thanks,Gasmanlee

 

Oil fouled or gas fouled? What's the compression? have you done a leakdown yet?

If I remember right those things had cam head problems. The cam would wear out the saddles out in the head and then it was junk.