i have a 1999 GH 618. With a 2006 Koehler command 18. I have had this mower for 2 years, and when it was running was a great machine. Last year it started getting really sluggish. And I'm no mechanic but have changed everything I know to do. All new belts, spindle rebuilt, new blades. I changed the hydro oil and filter last year before I ran it. And seemed fine, from what I have been reading the pumps are going bad. I have talked to GH dealer and they tell me the pumps can't be rebuilt. I...
Grasshopper 618 help
Grasshopper 618 help