so when you start it, the head is 230ish, but after it's been running the temps drop 70-80 degrees....it's also blubbery....your waaaaay rich.....and yes running an engine to rich can and will kill it sooner than having it properly tuned...the extra fuel/oil that gets pushed up into the combustion chamber don't compress, resulting in an increased compression ratio, causing more stress on the connecting rod, wrist pin, crank, piston, and glow plug