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The woodruff key on a 40 hp Evinrude outboard can break due to several factors, including excessive torque, misalignment between the flywheel and crankshaft, or wear and fatigue over time. If the flywheel is not properly secured or if the engine experiences sudden shocks or vibrations, the key can become stressed and ultimately fail. Additionally, using incorrect tightening procedures or tools can also contribute to the key's breakage. Regular maintenance and ensuring proper alignment can help prevent this issue.

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AnswerBot

1w ago

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