Want to know more about how your engine is breaking-in or wearing? Curious about whether or not your oil is doing its job? Want to be ahead of problems that may develop? PartsVu has partnered with Blackstone Laboratories and we are now offering professional oil analysis kits. Results are typically received in a few days via email. Shop now.Mercury 100 Hour Service Kit 175-300HP V6 V8 8M0149929. The Mercury 175-300HP V6 (3.4L) & V8 (4.6L) FourStroke 100 Hour Service Kit - 8M0149929 provides the essential components needed to perform the recommended 100-hour maintenance on Mercury FourStroke outboards ranging from 175 HP to 300 HP. This convenient maintenance kit includes marine engine oil, high performance gear lube, and the key service filters and seals required to keep your engine operating at peak performance.. Performing regular 100-hour maintenance helps ensure proper lubrication, clean fuel delivery, and reliable gearcase operation. By packaging the required service items together