Hello All! New poster to the site - very helpful for past issues.... I know little about engines other than minor maintenance... I'm having problems with an old Kawasaki fb460V recoil engine on a 20+ yr old JD 52" walk behind. Ran great until this year, when it began surging real bad when running at all throttle positions and was hard to start. I also noticed gas in the breather body. Took it to a friend who looked at it and said the compression was bad, so he ground the rods/cylinders and replaced the head gasket etc. Told me it was still not running right and that it needed a carburetor. After a long ordeal of trying to find a carb, it finally showed up 2 weeks ago. I put it on, along with new gaskets and a new spark plug. Had to makeshift a piece out of the back of the breather body - seems to be some sort of air flow connection, but got it back together and tried to start it......started immediately and ran great! Mowed 3/4 of the yard before it got dark, shut it down and put it away to finish the next day. I was so proud! Got up early to finish the yard, and it wouldn't start. I figured it was flooded or something simple, so I let it sit with the fuel line shut off. Tried later in the day with the choke on and off, fuel line on and off, drained the bowl and tried, sprayed some ether and tried - NOTHING! Pull after pull after pull...you get the picture. I took out the spark plug and pulled to see that I have spark. It's been 2 weeks trying here and there....I can't for the life of me figure this thing out. Any ideas for me to try???