Stepney 2,314 #1 Posted November 14, 2019 Hello, all. After seeing the post over in electrical on various stators used in the K series single engines. I remembered a post I'd been meaning to write. On the pre-70s Kohler big block single engines, the shroud wraps all the way around the cylinder, directing more air over the exhaust valve and block. Exiting more toward the grille. On later models, post 1970's, there is just a little tin 'cover' on the side, not covering the cylinder at all. Tons of air blows right past it and out the side. With my old snowmobiles, as time went on, things became MORE shrouded to help with cooling and not creating an oven.. and most newer small engines are more enclosed too. Any ideas why Kohler would direct more air AWAY from cooling the cylinder? Share this post Link to post Share on other sites
Darb1964 1,014 #2 Posted November 14, 2019 Maybe they found out that under most conditions it was to much air and cooling to much. The engine was never running at optimal performance temp. Share this post Link to post Share on other sites
ebinmaine 63,115 #3 Posted November 14, 2019 Perhaps someone with a digital thermometer could do a test or two.... Share this post Link to post Share on other sites
Mudrig150 298 #4 Posted November 14, 2019 13 hours ago, Stepney said: Any ideas why Kohler would direct more air AWAY from cooling the cylinder? I think it was problems with grass getting caught in the shrouds. Why the AQS engines have more of a gap, I think. Share this post Link to post Share on other sites
