This week I will discuss the advantages and disadvantages of two and four strokes.  A four stroke has four strokes; the first is the intake a valve open and allows fuel to come into the cylinder. The next is the compression stroke the piston drops and the both valves close, then the ignition stroke the piston starts to move back up and (if it is a gas engine)  the spark plug ignites the fuel after is the exhaust stroke the exhaust valve opens allowing the gas that is made to flow out.  In a four stroke engine the oil is put in the crank case were the moving parts are, so the oil and gas are separate.  In a two stroke engine the gas and oil is mixed and only has one valve the intake valve.  The gas and oil are mixed in a two stroke the gas first flows through the crankcase to lubricate the moving parts then past the piston into the combustion chamber. Then the exhaust freely flows out; this is gives a two stroke more zip. Since two strokes don’t have oil in the crankcase they don’t have oil in the crankcase and don’t have the extra vales and springs and ect. In the snowmobiling world lighter is better, the two stroke doesn’t have as much runtime as a four stroke but they have the quick response and are cheap to rebuild. A four stroke is heaver but has more runtime before a rebuild. But the rebuild is about twice as much as a two stroke.  The newer four strokes are getting to have a quicker response time all the time and are way more efficient.

http://www.animatedengines.com/twostroke.html
The link above shows a two stroke in motion.

This week I will be talking about the advantages and disadvantages of a snowmobile with a short or a long track. A track is what moves a snowmobile forward. The longer the track the more power you can get to the ground. Short track snowmobiles are fun for the trails because they can go fast but the track doesn’t hook up as well. A long track snowmobile is fun for the powder because it can put more power to the ground. The paddle length can also make a difference the deeper the lug on a paddle the better it hooks up in deep snow. So if all you are doing is riding trails a short track with a length like a 121 would be good. But if you are planning on getting off the trail get a sled with a 144 or longer with a 2 inch paddle.

In this blog I will discuss the different types, and brands of snowmobiles. I will discuss the different types of gear and upgrades that can be bought for a snowmobile and if it is effective or not. I will also talk about some of the people who are in the top of the snowmobile world and what brand they go with.