I have a friend who has one of these 12 HP, Kohler Cast Iron Wheel Horse heavy mowers. They're tough and can do the job, but their RPM is low compared to these newer mowers. His will cut, but not sling the grass like the newer mowers will. I've worked on those old cast iron Kohler's some and they can be temperamental when the carbs give trouble. My friend has a 14 HP Kohler side shaft engine on a Ford version of that style mower. I think it's the LGT series and HEAVY as is his 16 HP series as well. If they ever quit on you in the yard you'd have to get another one to pull it in to the garage as you are NOT going to push it up any slight grade. I've got to take the counter balance gears out of the 14 HP as it is clanging like a mule kicking in a tin stall. That's a winter project.