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Hi, all. I'm working on my dads old 720K which has (I believe) a Kohler CH640. That engine is becoming more trouble than it's worth, so I was curious what different engines can swap in. Have any of you converted your 720 to a different engine? Thanks

Hey everyone. Now that I got the Grasshopper actually running I'm thinking that the governor is either broken, missing parts, not adjusted correctly or was installed wrong. I have no way to know what the shop did to this mower before I got involved. They don't keep records and this is my Dads...

Gotcha. I'll definitely look at the guides tomorrow and see. The heat could have been a factor but I haven't looked it over super close yet. Thanks for the torque specs. When I looked at the head the valves and springs looked perfect. Just like you'd expect them to look. From what I could see is...

Hello all. My first post here. I ran a search and didn't come up with any results so I apologize if this has been asked before. I think my dads old Grasshopper 720k has a Kohler CH640. I can't tell exactly since the tag is trashed and I can't find any other markings on it so I went off of pics...

Hello, everyone. I thought I'll sign up to get some engine help with an old Grasshopper 720k that likes to back out the rocker studs and bend my pushrods :( I hope everyone is doing well and enjoying some sunshine and freshly cut lawns.