I have a 2006 Rhino 660. When you first start it, it will run fine. But after about 10 minutes, it will start sputtering and missing. Even if you turn it off and start again, it will continue to miss. Put a new fuel filter on it and a new breather. Thought that had solved the problem but it didn't. Can anyone give me any ideas what to do about it. Please don't suggest taking it to a shop. Can't afford that.
Have you cleaned the carburetor out that might help. I took mine off and cleaned all the jets out and used a tip cleaner for my torch to get all any debris out. Mine ran better, but no spark now so hope that helps
Try removing the engine cowl, start it up and let it run till it quits. Now pull the plug wire off, crank it over and check for spark (don't hurt yourself LOL). If spark is weak or non-existent then Red Good nailed it. If spark is strong but still no start then you'll need to check fuel flow by removing inlet hose at carb and cranking over (disconnect coil primary first - no fires needed, right?). Combustion = Air, Fuel, Ignition - chances are you have plenty of air so just need to chase done other ingredients..