[MNGB]

Hi grahman52, if your engine is battery ignition the coil will be round like this

http://www.ebay.com/itm/Ignition-Coil-Fits-KOHLER-K91-K141-K161-K181-K241-K301-K321-K361-/401052991817?hash=item5d609f0149:m:mt6ZLDY0cOV0CQ1R6794i-w

If it has solid state the coil will look like this:

http://www.ebay.com/itm/Genuine-Kohler-Coil-Part-cast-iron-series-k321-Solid-state-/311521559660?hash=item488821c46c:gi4AAOSwkZhWTO7Z

The coil is mounted on the side of the engine.

 

[MNGB]

That would be mag ignition.

 

[MNGB]

No you have to stay with the electronic coil, the blue coil would be used with battery ignition (points system)

 

[MNGB]

You can not for less than about $200 to $300.00, see the e bay link I posted for a used one and that maybe a crap shot. Many convert the engine back to points and condenser (battery ignition). Kohler even made a kit to convert. That would be my course of action.