kudzu3 323 #1 Posted June 6, 2015 I think I need to de-carbon the top and head in my 10 hp Tecumseh but just not sure about a few things. How do I seal the valve ports to keep "stuff" out? Is diesel fuel and a plastic scraper a good way to remove the stuff? Any suggestions are welcome. Thanks. Share this post Link to post Share on other sites
boovuc 1,090 #2 Posted June 6, 2015 On my Onans, I used big gobs of Vaseline around the valves and the cyl head to combustion chamber to keep crap out. You can use brake fluid but i actually used a citrus cleaner to loosen then scrap with a plastic blade. It worked as well as brake fluid and much easier on your health and work bench.On stubborn deposits, I put MEK on a rag and rubbed directly on it until it loosened up.(MEK is Methylethyl Either). Lowes or paint stores will carry it. Just don't saturate the rag. Share this post Link to post Share on other sites
