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 8M0097856. Stay on top of routine maintenance with a complete 100 hour service kit for Mercury 75-115HP 1.7L four-stroke outboards. This kit is built around 25W-40 four-stroke oil and bundles the core items you need for an oil change and gearcase service in one order-engine oil, gear lube, a matching oil filter, and a fuel filter to help support clean lubrication and consistent fuel delivery. New seals are included to help reduce the chance of seepage after service.. Serial number range: 1B366823 - 2B094995. What's Included in This Kit. 1x 25W-40 Four Stroke Oil (Gallon). 2x 25W-40 Four Stroke Oil (Quart). 1x Gear Lube