Before making any adjustments or repairs to your fuel system make sure you take all the normal precautions and be in a well ventilated area and away from and sources of ignition or fire.

Fuel smell:
If you can smell fuel from a few feet away or more it is usually leaking outside of the system. This might be a hole or crack in the tank, bad petcock or fuel valve or dried and cracked out fuel lines (dont use water line from your local hardware store only use actual fuel line) It can also be the lines on your carburetor bowl water traps. Many of them rub against the chassis. Carefully inspect the entire fuel system. Some lines may not leak until under fuel pump pressure or bent in the right position. Its best to replace all the lines at the same time.

Cylinders filling up-hydro locking:
This usually occurs form bad needles and seats or bad o rings. With the air box removed and the carb slides pulled to full throttle position you can usually use an inspection light and see the fuel running out of the transition circuit or tiny holes in the carb and draining into the cylinders or crankcase. See below.

Testing the needle and seats and o rings:
First unhook the carbs from the adaptors and anything else needed then drain the fuel. Then tip the carbs over and remove the carb bowls for inspection/testing. Normally you use a pop off pressure gauge for this but you can also use a syringe. The needles need to be moist during this test. A small squirt of WD-40 usually works fine. Tip the carbs upside down and attach a hose to the fuel inlet and then pump the gauge or depress the syringe. It should take a little bit of pressure before they lift up and release the air if they are working properly. If one or both start leaking the air out right away then they are bad and need replaced. If there is air leaking with the needle and seats held down then it is your O rings. You can remove the needle and seats by removing the 2 screws and pull them out. If they come out easy and go back in easy then they are not making a seal. There should be a little bit of pressure when inserting them into carbs. Polaris does not sell the o-rings separately for the IQ models but the whole float assembly is available for $70ea. Another option is to find a set of o-rings at a local shop. We are currently testing some o rings here that are slightly larger than the Polaris ones and only cost a few bucks.  Our test started in January 2011 and so far so good. They are for sale here: http://www.jspowersports.com/polaris_iq_fuel_intake.htm. Dont forget to reconnect the oil injection lines to the carbs if you removed them. 

 

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