I have a Honda Harmony 215 engine serial # GJAB-6676453 I tried starting up for the first time in about a year, and would only run for a few seconds. I went and got a replacement spark plug and put it in, and now it wont even turn over. I'm starting to think it's a carb problem. If anyone can help me that would be great.

I own a 98(?) Craftsman 4000 with the B&S 18.5 HP OHV Intek Plus engine. It usually does not sit long as I use it to blow snow with also. Recently, it started acting up once I've run it for a while. I just replaced the spark plug and tonight it started instantly. I mowed most of the yard, stopping a couple of times to dump grass. Each time it started perfectly. The last time, however, it started, then sputtered. The engine would run up to speed, then sputter and almost die, then repeat. I saw it was low on gas, so I added some. Then it would not start at all. The starter spins the engine fast, but nothing. I pulled the plug and am getting spark. I pulled the fuel line and as I cranked, fuel came out. When I removed the air filter, the inlet port to the carb was wet. When I cranked it then, some gas sputtered out of the port. I'm thinking maybe flooding. I noticed a tube coming from the oil dipstick tube to the fuel pump and assume that is what drives the pump. I then pulled the dipstick and turned the engine over - mistake. Oil splattered out of the dipstick tube. So, it runs great for about 30 minutes, then gives up the ghost. Any ideas would be greatly appreciated.