Way is & how do you change the decompression spring in a kohlor courage 25

What you describe as slow may be starter stall. Starter stall occurs when decompression fails which is typically due to the valve lash out of spec. The Kohler Courage is an OHV engine that requires periodic valve lash adjustment.

Try removing the spark plug and then engage the starter. If it still cranks slowly then the problem.is not related to decompression.

lever works on a cam lobe inside eng. if n high side of lobe it wont stay engaged. move lobe by turning eng slightly it should engage properly after eng moves slightly

The carb on that engine appear to have a float bowl. If that is the case, the float is out of adjustment.

check for gas in the oil if not bad starter

before you do that spray some starting fluid in it see if it starts if it does rebuild carb compression springs rearly break

Sounds like a valve that releases some or all of the compression during starting, to make ripping the cord easier. When the engine fires it is supposed to close automatically & allow the engine to start. They can become faulty mechanically (broken spring) or they can become clogged with combustion junk, esp if run the oil too rich. This will make starting difficult or impossible. Best fix is to replace with new or re-manufactured if you can get.

Are you pulling the plug to check for wetness after cranking it a few times, WITHOUT using the starting fluid? Also, I would recommend using carb cleaner in place of the starting fluid. Starting fluid runs the engine VERY hot for a brief time and can possibly damage rings, valves, and aluminum parts.

governor out of adjustment

Is your foot on the brake when you push the button? Try that. Also try putting it in neutral when you try to engage 4x4.

I’m happy to assist further over the phone at https://www.6ya.com/expert/kim_3202917d7c587455

it could be a relay;rings;or the valves,
it sound like compresstion therefor rings or the valves