Why is my snowmobile hard to start when it's really cold?

get the glow plug checked as a starting point

r u running non ethanol premium? r your plugs fouled?fuel filter clogged? got good spark? call dealer and ask if they got any body with same problem. then ask on line ,describe problem exactly and see if anything pops up.hope it helps.larry too

If it's 2 cycle the oil is cold and thick and do sent want to feed the heater need to be on or around the oil tank and carb

Carbs need to be cleaned. Not getting enough fuel

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

Reason 1 - Gasoline, like any other liquid, evaporates less when it is cold.You have seen this -- if you pour water onto a hot sidewalk it will evaporate a lot faster than it will from a cooler place like a shady sidewalk. When it gets really cold, gasoline evaporates slowly so it is harder to burn it (the gasoline must be vaporized to burn). Sometimes you will see people spray ether into their engines in cold weather to help them start -- ether evaporates better than gasoline in cold weather.

Reason 2 - Oil gets a lot thicker in cold weather. You probably know that cold pancake syrup or honey from the refrigator is a lot thicker than hot syrup or honey. Oil does the same thing. So when you try to start a cold engine, the engine has to push around the cold, gooey oil and that makes it harder for the engine to spin. In really cold places people must use synthetic motor oils because these oils stay liquid in cold temperatures.

Re ason 3 - Batteries have problems in cold weather, too. A battery is a can full of chemicals that produce electrons The chemical reactions inside of batteries take place more slowly when the battery is cold, so the battery produces fewer electrons. The starter motor therefore has less energy to work with when it tries to start the engine, and this causes the engine to crank slowly.

All three of these problems can make it impossible to start an engine in really cold weather. People either keep their cars in heated garages or use "block heaters" to get around these problems. A block heater is a little electric heater that you plug into the wall to keep the engine warm.
i hope it was convince answers

Have a block heater installation the day light things warm up at night it gets really dry cold that's when the block heater keeps the engine warm enough to start.

If plugs, wires, and battery is new and good, make sure you are using 5w30 oil which is thinner and is made for winter. If needed, replace the fuel filter. There is a cold start valve that may be giving you problems. You can go to autozone.com and register for full free online repair manual for your car.

plug your block heater in during cold nights. if it turn over your starter works but it may be cold. BTW the cord is in the front of your car just plug it into an outside outlet

most the time they don't. unless you said to. i live in Alaska, and when people buy new vehicles they say they can't put them in. if your not familar with cars than you should have it professionally done. sometimes it can be a pest. on the side of your engine block you should see an indent a little bit bigger than 50cent piece USD. it is a plug. you have to purchase the block heater (which is just an element) remove the plug and VERY quickly put the heater back in. the block heater keeps the coolant warm and is through the coolant duct. all the coolant will immediatly pore out. if it is installed wrong you will have a coolant leak. you should have it done professionally done to avoid future problems

dose it have a block heater if so plug it in