Pull the line that goes to the carb off at the pump. You can take it off at the carb, but easier at the pump. Put another length of hose on the pump and run it into a container. With the engine off, turn on the fuel. You should see a trickle of fuel or none at all. Now with the spark plug off so it won't start, crank the engine. You should see a steady pulse of fuel. It will be enough difference that you can tell it right away.
Reference the vent lines....do you mean the ones off the top of the carb? There should be at least on line off the top of the carb that runs into a hole in the frame or somewhere else that it can get crap in it. I have seen them with a filter on the end just hanging out too.
This pic is my MOSE. It is 2001 and only a 330 engine. But the principle is the same. The clear lines at the back of the carb are the vent lines.
2001 Magnum 325 with a blown engine; rebuilt 2004. Broke timeing chain 2016 rebuilt again and still running. Warn winch and Moose 60" plow
2007 Sportsman 500 EFI, Polaris Winch, 26" Bear Claw HTRs on Moose 427x Wheels. 12x7 front, 12x8 rear, QSC Clutch Kit
My Trail Machine:
2004 Sportsman 600 Twin, 25" RipSaw Tires on stock steel wheels, Moose rear box
Completed Project machine:
2001 Magnum 325 MOSE with a blown engine. Transplanted a 2005 Magnum 330 engine. Committed suicide on the trail Oct 2016. Spun Rod Bearing after oild cooler line failure. Rebuilding Engine.
Last edited by stave7119; 02-14-2017 at 06:09 AM.