I managed to complete the oil fill piping mod that Keyair pioneered on his Kohler generator. Using his parts list I went to the local Ace hardware and bought the needed supplies.
Using his pictures as a guide I removed the old filler piping using a sawzall. The cutting went a lot easier than I expected.
As you can see there is an oily mess underneath the generator. And to think that area was spotless back in 2006 after I mounted the generator on drawer slides. In 6 years of mostly just sitting with very little run time on the generator it leaked this badly
One thing I realized AFTER installing the 4" pipe with the coupling attached is 4" wasn't long enough for my genset. It was about 1/2" to short. Not sure why mine would end up being different that Steve's but it was. After looking at it for a while I realized that I could turn the Street Elbow around and use a close nipple between the coupling and the elbow. This pushed the Street Elbow out just about 1/2" which worked perfect, which meant I didn't have to run back to the hardware store
So for anyone else contemplating this mod (highly recommended) I would suggest verifying the length needed before installing the pipe. Once I had it installed I could not get it removed because I couldn't get a wrench on it.
I did have to make one other mod as well. In the Tee where the pipe plug is installed I had to cut a section of the Tee off as it was to close to the metal pan. By sawing off about 1/4" of the Tee there was enough clearance. The plug itself is sitting high enough above the flange that it doesn't make contact even when starting and stopping.
Hopefully this mod permanently solves the oil leak problem. One problem resolved, now about 200 more to go