129 hard start
 

hello all
im not sure what is going on with my kohler 301 but when its cold or chilly out it is makeing a loud pop when trying to start it and when it pops gas and air is coming out of the air breather some one told me it was a burnt exhaust valve but i have no clue this is my first cub and i never worked on a kohler before I have changed the oil and spark plug and put a new air filter on it and it still will pop when trying to start when cold when it does start a puff of smoke comes out but not much when runing it runs veary well and handles heavy loads well

Sounds like the timing is off. Here's a link to a great writeup on how to set it correctly: http://mgonitzke.net16.net/tools/static_timing.pdf

Mine was doing the exact same thing.... Burnt exhaust valve and not only does it start easil now it has twice the HP it did before.

May want to check the ACR,Maybe the tab is broken off.

thanks ktm I redid the timing and wow is starts right up and no pop or smoke now I will run it tomarrow to see how it works with some hours on it
thanks again