RMCIII 838 #1 Posted July 4, 2015 Goofy but maybe someone knows the answer to this. So on my Kohler Command engine with a model number is CH18S. < That model number does not exist according to the Kohler engine website. What does exist is a CH621/CH18 - horsepower rating of 19hp. Right on top of the engine it states 18hp. Was someone sucking on some grape wine when they installed this engine?RC Share this post Link to post Share on other sites
Racinbob 10,370 #2 Posted July 4, 2015 Doing a search for a CH18S brings them up. Don't have a clue why the website doesn't have it. 1 Share this post Link to post Share on other sites
boovuc 1,090 #3 Posted July 5, 2015 If you search just by the CH18 Command pro, I have seen a few of these HP ratings on links for the same engine so yes, with a different head or piston, the same cc engine can have a different HP rating even from the factory. Horizontal TWIN Cylinder CH :: CH18 - 18-19 hp 624cc :: 18HP 62638 KOHLER COMMAND ENGINE CH18S WALKER ZTR Live Chat Software 1 Share this post Link to post Share on other sites
