Better check those engine mounts...

[beeryboats]

The 1.74 X 5/16 washes that came with my kit are Kitfox part 91008. They are labeled "Lord Mount Snubber Washers".

Thanks, I'll order tomorrow. I just got the hardware tonight.

[beeryboats]

Ok guys. It looks like the center bushing is hardened steel. How in the heck did all you mod. IV Rotax builders grind through to make the center 5/16"? Or did they come that way from Kitfox? I used a new drill bit and just started to make a dimple in the darn thing. But you can't really push down hard with the drill press as the rubber starts to give. I was thinking of backing it up with a piece of wood. But I don't hold much hope that it will work.
Jay

[Av8r_Sed]

You just have to work up to it using increasing size bits and finish it off with a chucking reamer to acheive a tight fit. That's what the manual indicated circa '91.

[beeryboats]

Ah! Ok, that's the info I'm missing as the second owner. I'll gather all the drill bits between 1/4" and 5/16". It will be easier on the drills as well.
Thanks!

[Av8r_Sed]

Don't forget to borrow some letter size drills if they help the progression.

[Dusty]

I had trouble getting the right mounts( mine may have been drilled)
The solution was to go to smaller bolts and fit a sleeve in the engine bearer ,as drilling the mount wasn't practical as it appeared to be hardened

[Kurt.A]

Jay,
Snap On sells stellite 100 drill bits, might be worth the try if you are still having issues. If that won't drill it nothing will. Be carefully they are brittle.