Hi! Welcome to Only Cub Cadets!
Tear down of your IH Cub Cadet 1650 QL is simple, as long as you understand and pay attention to what you are doing.
I would take pictures, and label connections as well as conductor connections. However, a good clean up of the engine bay and engine seem like a great starting point. I would use Purple Power.
There are others here that can help when and if it comes to the front and or rear main seals. I suggest you weigh all options and decide on the best method to accomplish this task, if it is in deed these engine seals.
I have a nice insight thread about my IH Cub Cadet 1450 QL under the name of U.S.A Tractor Joe across the street in the Cub Cadet forum, at My Tractor Forum.com . Here you can see first hand, what the manuals don't give, and especially how many times I end up removing the Kohler K321AQS , which is basically the very same engine as your K341AQS .
Good luck. These IH Cub Cadets are worth the time and cost!!
