Small Engines (Lawn Mowers, etc.): 7hp kohler generator, kohler generator, density changes

Question
I just recieved an antique 7hp Kohler Generator. Im a amateur mechanic that works on small engines but I've never delt with a Kohler this small or old. Here's the story behind the question. I was working on a job site at a house and this little generator was running while one of my co-workers was drilling holes. After he got about 3 holes drilled the generator shut off. The man that owned it went out to look at it and could not find the problem. He said that I could have it so I took it. I have been looking at it  checking for the problem and cant find it. I checked the points, magneto, coil, condenser, spark plug, internal parts and just about everything else. The carburator is still in good shape and does not need to be replaced or rebuilt. That leads to the question. What is the problem with it?

Answer
Nick,
  Generally all the externals are in operating condition but try to change out the condenser and points alot of times they fail faster then internals But if that dont help it out check the oil level and viscosity those older engines have a thermal protection Auto shut down if the lubrication density changes then engine acts dead.
Also another thing you may want to consider Kohler has not built a 7 hp engine in about 10 years so that is a obsolete engine you can interchange the old engine with a 5.5HP briggs and get the same performance as a 7HP
Antique is correct but if it has spark and it is getting fuel but just refuses to run it may be time to retire it to the china cabinet
what you have to understand is Compression is the key check to see if there is compression loss if you dont compress the fuel to fire  then it may need a set of rings or a new piston resleeving in the long run I think this lil guy has reached and outlasted its duration of duty:)