[RCW]

Thumperacres, do not open the vent hose with an additional vent and leave the pathway to the air box unplugged. That will pull dirt into the engine without benefit of filtration.

Surf, the newer 3010 gas rigs (as do a host of motorcycles and atv's from just about every manufacturer) have a well known and documented problem with oil volatiles blowing through the closed loop vent system and clogging the air cleaner. The solution is to do exactly as described above by disconnecting the vent hose from the air box, plugging that hole, and then to lengthen and route the vent hose to the atmosphere. I go one farther and stuff the open vent hose with a "chore girl" metal scrubber to keep bugs and crap out of my engines. Just remember to clean them once in a while or the metal chore girl will clog and lead to excessive crankcase pressure.