Have arctic cat 400 4x4 sat four 3 months will start win you spray starter fluid in to carb but will not stay running

arctic cat what --need model

Check the charge on the battery, should be at least 12.6 Volts DC, then look for loose or corroded connections, starting with the battery cables.

Pour a few tablespoons of Automatic Transmission Fluid (ATF) down the spark plug hole into the cylinder. Leave it sit with the ATF in it for a few days. With the spark plug still removed, crank the engine over a few time to expel the ATF from the cylinder. Turn the key off, spray a light squirt of starting fluid or carb cleaner down the the spark plug hole into the cylinder and install spark plug. Try and start as you normally would.

Soaking the cylinder a few days with the ATF should dissolve any rust/corrosion that may have frozen the piston rings to the cylinder wall. If still will not crank over, then I would suspect the starter is corroded or bad. Of course it could also simply be a bad starter relay. To test this I would use a jumper wire from the battery positive side to to the starter side of the starter's relay. If the starter whirls to life, then this would confirm the relay needs replaced. If the starter still will not engage then you're back to either a bad starter or the piston being froze in the cylinder.

The coughing implies that it's a fuel problem. It sorta wants to run but is not getting any fuel. Remove the air filter and see if it will start and run for a bit with a squirt of starter fluid. If it does, it's a dirty carb or something fuel related.

Try starter fluid - if it momentarily runs the problem is with the choke and/or main jet of your carb.

"ATV" service and repair manuals - CRXSi.Com

www.crxsi.com/reference/manuals/atv/
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Check fuses first. Verify you have spark at plugs, clean/replace plugs if wet with fuel. Verify you have fuel. Spray carb cleaner or starting fluid into intake , is she starts for a second investigate your fuel filter or pump.

clean carb

check the bowl of the carb unscrew bolt on bottom clean as nessary

the fuel doesn`t pass, the fuel jet clogged ,try to cleaned the carb very nice ,allow small jet and little orifice nozzle in a (soaking bath cleaner.( OVERNIGHT)Do not use wire or .wire brush