Join Date: Feb 2009
Location: The Great White North..Eh!!
If your Polaris Ran out of gas, now it won't start
Some Polaris machines use an impulse fuel pump between the fuel tank and the carburetor. It works well as long as fuel is in the lines. However, sometimes it needs a little help overcoming vacuum lock. This most often occurs after long storage periods, or after you run out of gas, and the engine stalls. You crank and crank, but the machine refuses to fire. Sometimes, you can apply the choke to a warm engine, and it will start, other times it may only pop, but not fire up and run. There is a way to fix this.
Remove the seat.
At the front of the air box, you will see a rubber 'horn' for the intake. Simply put your hand over the intake horn, sealing it off the best you can, and crank the engine. Usually, within 10 seconds of cranking or so, it will fire. Remove your hand as quickly as it fires up, to prevent flooding the engine. Better yet is to have a friend hold their hand over the intake, and you apply throttle as you crank. What you are doing is trying to increase the vacuum enough to overcome the vacuum lock in the fuel lines.
Some machines have a snorkel, or intake that disappears up near the gas tank that you can't conveniently cover. If this is the case, remove the air box cover, and air filter. Cover the intake to the carb as best you can (even a sock sometimes works). You may have to be inventive, but if you can block off the intake enough to build up good vacuum, you will draw the fuel to the carb.