The engine of a 2-stroke snowmobile will last between 2500 and 5000 miles before needing a high-end upgrade and between 7500 and 15,000 miles before needing a complete rebuild. However, another thing to keep in mind is that buying a used snowmobile involves the understanding that you may have to perform a high-end upgrade or a complete rebuild in the near future. The best way to determine the condition of a snowmobile's engine is to check the compression in the cylinders. This is because mountain snowmobiles tend to ride harder, on rougher terrain and at steeper elevations, which can cause more problems than if you drive a snowmobile on a trail along a beautiful, flat path on soft terrain.
Because it means replacing parts on the “top of the engine”, this service is known as “high-end upgrade” or “high-end rebuild”. When you're thinking about buying a used sleigh, it's important to consider the type of snowmobile you're going to buy. Not all snowmobile engines are the same, so when considering how many miles the sleigh you're looking at has, you should also consider if it has a 2- or 4-stroke engine. For example, a clogged carburettor can easily leave a 2-stroke engine unlubricated, which can immediately cause significant engine damage.
Snowmobile engines last between 5,000 and 20,000 miles, or even longer, depending on many factors, such as type, use and maintenance. It's also good to know that high-performance parts from the aftermarket always offer more fun, but they also reduce engine life. Some of them will only apply to people with 2 times and others will only apply to people with 4 times. The way a snowmobile is driven is an important factor when considering mileage, since intense mileage, such as mountain riding, for example, will always wear out more on a sleigh than the easy mileage that accumulates on a trail.
In short, this is a complete reconstruction of the engine and, in addition to the parts mentioned above, the bearings and perhaps also the crankshaft must be replaced. If properly maintained and used, a 4-stroke snowmobile engine can last 20,000 miles, or even longer. The mileage you get with a snowmobile depends entirely on the maintenance history and how the sled was driven. We are going to detail a little more about the things you can do to ensure that your snowmobile lasts a long time.
Naturally, a 4-stroke engine provides you with more long-term reliability compared to a 2-stroke engine.