Repowering LT40

D6c · May 06, 2019, 09:42:00 PM

Someday I'd like to replace the 20hp Onan on my '87 LT40 but all WM offers is an 18 hp Briggs. The whole reason is to gain power. 30+ would be nice...any reason a higher hp Briggs couldn't be adapted?
What's the 38hp I've read about here? Briggs?

Chuck White · May 06, 2019, 09:58:24 PM

I installed a 25hp Kohler on my 1995 LT40HDG 3-4 years ago, still going strong!

I ordered the Kohler kit and it came with everything needed to get it installed and sawing!

My brother and I took the Onan off and installed the Kohler in about 2 hours and I was back to the jobsite and sawing within 3 hours!

John S · May 07, 2019, 09:23:04 AM

The 38hp is the current Kohler that WM supplies on some of their mills. I have 210 hours on my LT40 Wide with no issues.

pineywoods · May 07, 2019, 09:55:13 AM

I replaced the worn out 18 hp briggs on my 95 LT40 with a 25 hp liquid cooled kawasaki from a lawn and garden tractor. Pretty much a bolt-on replacement. Back sawing in one day..

Bigblazer · May 07, 2019, 12:35:09 PM

Many small engines share similar if not exact mounting pattern, crank position, and size. Just make sure to measure what you have, and use that when picking a new engine. Your easiest retro fit would probably be a Kohler v-twin spec'd for a Woodmizer, but just about anything would work with a little homework.

https://www.kohler-engine-parts.opeengines.com/-p-12224?gclid=EAIaIQobChMIwbCNwO2J4gIVyMDACh3N0wILEAQYAyABEgJyb_D_BwE

MartyParsons · May 07, 2019, 01:43:48 PM

Hello,
The early Wood Mizer mills had the cam bearings placed at a 45 degree angle on the upper and lower frame rail. The change was done in 1996 and 1997 more bearings were installed and the angle was changed to handle the added weight of larger engines some with radiator cooling etc. . That being said this may shorten the life of the mill if a larger engine is placed on the mount. Engine mount bushings were also changed to a bushing due to the rubber failing when the diesel was placed on the LT40 in the 1996 97 era. I know there are some owner who have installed larger weight engines on this early design and have dealt with the weakest link issues in the future after completing engine up grades.

Hope this helps.
Marty

sawguy21 · May 07, 2019, 01:50:52 PM

Briggs currently offers a 23 hp which is basically plug and play, the next step up is 31 hp but that is a larger and heavier engine. You would also need to chaange the clutch.