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 Project Overview 
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			The goal of the clean snowmobile project year after year has been to modify what was once a stock 2007 
			Yamaha Phazer snowmobile into a machine worthy of the SAE Clean Snowmobile Challenge. Past 
			alterations to the Yamaha Phazer have included the addition of a MicroSquirt engine control unit, catalytic
			converters and custom-built cowlings. Along with the modifications, the goal has also been to document 
			and provide theoretical support of these changes taken towards creating a well-functioning and 
			environmentally-friendly snowmobile. This year's initial goal of competing in SAE's annual Clean 
			Snowmobile Challenge was overrun by the problems encountered by the previous year’s team.

			This is the fifth year the 2007 Phazer has been used for a capstone project. During the endurance run 
			portion of the 2011 SAE Clean Snowmobile Competition, the snowmobile ran into problems. Due to an
			extremely high air-fuel ratio, the engine experienced overheating, ultimately leading to one of the pistons 
			being damaged. The severity of the damage ended the team’s ability to compete.  After returning from the 
			2011 CSC, the 2011 team removed the engine, disassembled it, and due to a delay in parts from Yamaha, 
			left it for the following year’s students to repair. 

			The 2012 University of Maine's SAE Clean Snowmobile team undertook the arduous task of taking a 
			heavily modified snowmobile, with inadequate documentation of the 2011 changes that had been made, 
			and delivering a competition quality machine, ready for the 2013 team to modify as needed.

			The 2007 Yamaha Phazer was left by the 2011 Team in a broken down state. The engine was completely 
			torn apart and stored in boxes. There was little documentation as to what actually went wrong and how to 
			fix it. The engine needed to be assembled as well as making all the wiring connections. Without previous 
			knowledge of part placement before the machine was disassembled, it was quite a challenge. The engine 
			control settings were also not documented consistently. The files that did exist were not clearly labeled 
			with dates, so there was no clear starting point. The cowlings had also been damaged and slightly restored. 
			Of the three cowlings, none were at the same stage of repair. The 2011 team also left a damaged exhaust 
			system, including a pre-catalytic converter and a catalytic converter. The insides of the pre-cat were 
			damaged and had blown into the cat. It is assumed this happened because the machine was running too 
			lean. 

			The focus of this project shifted towards rebuilding the snowmobile to run properly under stock 
			conditions, document how this was accomplished, fabricate a fuel injector flow bench to determine if the 
			stock injectors are sufficient for use with ethanol based fuels, and overall: to place the following team in a 
			position to be successful and further progress the clean snowmobile project at the University of Maine.

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 ______________ 2011-2012 ___________________