Introduction
Cleaning the heat sink improves thermal efficiency and overall performance of the engine. It makes sure no debris gets trapped in any opening.
Tools
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            Using a 5/16" socket or wrench, remove the three bolts holding the plastic cover on to the engine. 
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            Lift away the plastic cover. Note that the starter is attached to the cover and will come off with it. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.