Had some issues about a month ago with snowblower, and kind folsk here walked me through the process. Had another issue come out, and just can't figure it out. Its an Ariens 8 horse.....starts and runs fine.....but after about 45 minutes or so (maybe warmer tems) it starts to bog for a second, then goes back to full running. Sometimes if I move the choke lever one click, it will then run strong/normal......after it runs normal I put the choke back to the left, and then it will run fine for about 10 minutes and start bogging a little. It only seems to do this in temps above 30, and when its been running for a good long while. Took the bowl off, cleaned the carb, new fuel, etc.... Its just weird as it starts and runs fine, the starts to act up around 45 minutes of use.....pull the plug and check it? what to look for?