What you have there is what appears to me to be the correct Cub Cadet ISO Mount part kit for your tractor. It also looks as if you have assembled the kit correctly. with the washers in the upper mount and the sleeves in both the lower and the upper mount.
The washers retain the strength of the upper mount by keeping it from collapsing onto the lower mount, resulting in a loose bolt. The lower mount fits into the engine cradle hole. The bolt goes through the hole in the frame, into the sleeve inside the lower mount, then into sleeve of the upper mount, then the large washer is put on top. and the bolt is secured with the locking nut.
In your last picture, you have the correctly assembled ISO mount in your hand. Now, you need the modified engine cradle. Set the cradle inside the frame of the tractor. Secure it with the new ISO mounts, as you have them assembled, and according to the assembly instruction. Use a new locking nut. and tighten to no more than two threads showing. Replace the engine in the tractor, and bolt it to the engine cradle. BE SURE to use lock washers! (I used a drop of blue Locktite on the engine mount bolts after they came loose once!)
Put the rest of the tractor together and run it. Take it for a cruise. It probably will bounce and vibrate. You then must begin the tightening process to find the best spot for your mounts and your engine. Mine settled in with three to six threads showing, depending on the mount. That is not to say that yours will be the same.
Two things to consider: First, it has been said that new ISO mounts tend to 'wear in' a little bit. This may be a long process to get them adjusted. Don't give up. Second, check your mounting bolts regularly. Be sure the engine bolts are tight, so that no vibration comes from loose bolts at the oil pan; and be sure that the ISO bolts are tight. Too tight is better than too loose. Two threads showing may be to loose to start. If you can turn the ISO Mount bolts with your fingers, they are too loose.
Good luck with your project and please let us know how it progresses.
Brian Wittman
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