Hotrod1830
Well-known member
- Joined
- Sep 14, 2010
- Messages
- 513
Been Working on this for a couple weeks. I recently got a Bocat 310. Although the Original Kohler K341 16hp ran decent, it just wasnt as smooth as I would like, and seemed a bit under powered. Add to this it has 1200 hours on it, and the decision was easy When I came across a 25hp kohler V-twin. But, it was in and running before I got the camera out. Yes, it will fit, but it is tight. It IS NOT a bolt in. Several big points are the Closure plate(where the clutch coil bolts to) Needs to be milled flat. The new Kohlers have a "multi fit" pattern that has one set of mounting holes stepped up. Otherwise, the clutch will sit out about 1/4" too far if left unmachined. No big deal, about 15 minutes in the mill and it was done. Just mill all 4 pads to the same height and your ready. Not sure if all the new kohlers are like this, but the ones I have seen are. You will need to install a flexible fuel filler hose and relocate it to clear the larger blower housing. You will need to drill for new mounting holes. I reused the original engine mounts, so the holes where 1 1/4". Easy work for a plasma cutter. location will need to be determined with a "Dry" install. You will need to lengthen the engine "strut" rod a 2-3 inches. A new ignition switch will be needed, as this engine uses a magneto ignition and needs to be grounded to kill it. I used a magneto specific switc havailable at most parts stores. You will need longer belts. easily measured for once the engine is in. I had to "clearance" the hydraulic lines in the rear of the compartment by gently prying them apart to clear the rear valve cover. Last but not least, you will have to trim 1-2 inched off the battery box to clear the oil filter. ( I had to fabricate a rear cover because mine was damaged, and I made it deep enough to clear) You can get a smaller size battery to fit with plenty of CCA's I found an engine with a 1 1/8" x 3.75" shaft, so the factory drive sheaves fit perfect. http://i213.photobucket.com/albums/cc102/bigblocknotch/bobcat31025_zps9edb4899.jpg