DON"T TRY IT YOURSELF!!!!! I cleaned and sealed my tank myself last year during the summer and let it set all winter.I rebuilt the carb added a new float, had it running good this summer, left gas in tank. Went to start it again this fall , hit the foot starter and clatter clatter clatter.BENT ALL 6 pushrods(for intake) and stuck all 6 INTAKE VALVES!! I don't know what is in this gas today, but it disolved the gas tank sealer, it got to the valves and stuck them like LOCKTITE. Can't even move them with a BFH!!! Just purchase a new tank if possible it will be cheaper in the long run. I am in the process of building a 235 to replace the now JUNK 216.JUST MY OPINION. Hope this helps. Eric
