I'm tinkering with an old Promark 210 brush chipper and mounting a Kohler twin cylinder engine to it for power. I'm trying to identify the HP for the engine as the spec tags are missing. It does have 9 head bolts on each head and electronic ignition. I found "042" stamped on the block. Also, looks like a date of 12/81 stamped on the mounting flange. Horizontal shaft measures approx 4 5/8" x 1 3/8" Other searched has me thinking it's a M18. Can anyone identify by the pictures?
Thanks
Thanks