huey 7 #1 Posted August 17, 2019 just curious comparing the KT17 series 2 engine and the Magnum M18 and the bore and stroke look to be the same, now i know that the ignition is different but how do they get the extra horsepower on the M18? Share this post Link to post Share on other sites
pfrederi 18,333 #2 Posted August 17, 2019 Creative marketing..... 1 2 Share this post Link to post Share on other sites
ebinmaine 70,736 #3 Posted August 17, 2019 Is the cam or airflow system different? Share this post Link to post Share on other sites
953 nut 57,904 #4 Posted August 17, 2019 2 hours ago, huey said: how do they get the extra horsepower Same way the 1963 K-241 was 9.6 HP and in 1964 the same K-241 was 10 HP. Rounding up to an even number. 1 Share this post Link to post Share on other sites
pfrederi 18,333 #5 Posted August 17, 2019 You may remember a few years ago they stopped mentioning Horse power in Small engines talked more about ft-lbs of torque. There had been a lot of creative HP ratings prior to that. There are different ways of rating HP. The KT 17 and M18 are both flat head 42 cubic inch twins . The AO-42 twin on my Mule is 42 cubic inches overhead valve and is rated at only 14 hp. The cam shafts have different part numbers (Maybe Isky designed a high lift cam for Kohler on the Magnums...) 2 1 Share this post Link to post Share on other sites
ebinmaine 70,736 #6 Posted August 17, 2019 8 minutes ago, pfrederi said: Maybe Isky designed a high lift cam for Kohler on the Magnums...) Boy would that be coooool... Pretty easy to get 1 HP per cube in big engines... Imagine if it were that easy in a little one. 1 Share this post Link to post Share on other sites
huey 7 #7 Posted August 17, 2019 27 minutes ago, ebinmaine said: Is the cam or airflow system different? unsure just curious as where the extra 1hp comes from ? Share this post Link to post Share on other sites
953 nut 57,904 #8 Posted August 17, 2019 13 minutes ago, pfrederi said: You may remember a few years ago they stopped mentioning Horse power in Small engines talked more about ft-lbs of torque. There had been a lot of creative HP ratings prior to that. News 12 at 6 o'clock, June 24, 2010 AUGUSTA, Ga. -- A lawnmower lawsuit is now shifting into gear. More than 15 manufacturers have been accused of misrepresenting and overstating the horsepower in engines. "Horsepower, it's a man thing now," says Harry's Equipment Shop owner Harry McGahee. "Everybody wants more horsepower ... A lot of people don't buy a lawnmower, because it doesn't have as high a horsepower than what it's rated at." A lawnmower in your garage bought between 1994 and April of this year could net you up to $35 if you have a push-behind lawnmower or up to $75 if you have a riding mower. The total amount of the settlement is $65 million dollars, and some companies are offering extended warranties. Individual awards could be lower than those amounts if enough plaintiffs join the class action suit. The settlement means the companies are not admitting they falsified horsepower but have decided it is in their best interest to pay out claims. John Deere, Husqvarna, Toro, Kawasaki, and several other brands of lawnmowers and lawnmower engines are included. You'll need the serial number of your lawnmower or lawnmower engine to file a claim 1 2 Share this post Link to post Share on other sites
