It's best to start with the basics, like cleaning off the snowmobile. Besides removing any dirt and debris, a clean machine will help you make a better evaluation. You will be able to see any stress points, buckling or cracks. Let your eyes and your hands wander over the snowmobile, especially checking for any loose parts.

Pay special attention to the skis and runners. Whether the skis are steel or plastic, there shouldn't be any holes or deep gouges in them. Occasionally, the runners can get bent, but this is fixable by using a vice to straighten them out.

The next step in the preparation process involves some mechanical ability, but anyone can tackle these items. All you will need are a few tools and the owner's manual nearby as reference.

Wipe all the grease fittings on the machine, carefully cleaning off any corrosion that may have developed. You will then be adding new automotive grease to these fittings, filling them until the older grease oozes out. Be sure to do this to all the fittings; check the owner's manual to see the exact locations.

If the gas wasn't drained out at the end of last year's season, now is the time to do it. The snowmobile won't run well on gas that's been sitting for months and when you're out on the trails you will want the best performance you can get.

Spark plugs should be removed and replaced. Refer to the owner's manual to determine the correct plugs to use. If you purchased the snowmobile from a private owner, don't assume the spark plugs are the right ones. Take a moment to verify it from the manual. Although cleaning the spark plugs might be an alternative to putting in new ones, to get the most out of your snowmobile, go for the new plugs.

The starter rope should be examined for any fraying. If it doesn't look in great condition, replace it now. It's always advisable to carry a spare rope with you on the trails, so buy two and keep one for a spare.

Check the battery terminals, clean them and add water to the battery if it's low. The carburetor should also be cleaned, especially if the machine has been idle for a while. Use a quality carburetor cleaner and pay special attention to the inlet needle. This has a tendency to get stuck either in the open or shut position. In the open position the engine will flood but if the inlet needle stays closed there won't be a proper amount of gas to fuel the engine.

Check the throttle and make sure it moves freely. If this control should stick in a fully or partially open position, the snowmobile may be recklessly powered forward and could cause serious injuries. The throttle is spring-loaded which means it's designed to return to an idling position when you take your hand off it. This is an essential part of operating a snowmobile and needs to be thoroughly checked.

A safe snowmobile will give you the most enjoyment with the least amount of risks.