Here's my current issue. My 40 starts right up first time no problems. The issue is after I drive it for a while. Anything over 10 minutes or so, turn off the engine and try to fire it back up after a few minutes of setting. For instance, just 2 days ago I drove it to the nearest gas station which is about 5-6 miles away from my house. Turned the engine off to pump gas. After it's all filled up, turn the key and the engine turns over fine, lots of life but doesn't start right up. It takes a few minutes of cranking on it before it fires up. Smells of gas fumes while cranking on it. Any ideas?