I replaced a burnt exhaust valve in a Wisconsin four cyl air cooled engine ( in my Bobcat) and find the cyl that I worked on is running REAL hot, while the other three run cool and the other three plugs all look good. The plug from the cyl I worked on is running white. Also, I can see the exhaust valve in this cyl and it is white. I have check for "false air" and readjusted the valve clearance, still, runs too hot....If the timing were off, I would think more than just one cyl would run hot??? Am I wrong. I have not adjusted the timing, as I need to run this engine at more than 1800 rpm to adjust it and I hate to run it at all for fear of burning this cyl up. Any advice?? I have been chasing this for a month now....
Thanks for any advice..
Bruce