How to Break In a Motor Investing just 10 hours into your new engine can add years to its life. The catch: It has to be the first 10 hours. This allows the motor's moving parts to properly adapt to each other. Here's the recommended itinerary:• Hour 1: Run the engine at 2,000 rpm (approximately half throttle).• Hour 2: Run the engine at 3,000 rpm (approximately...

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