Yamaha F25 300-Hr. Service Kit 1998-1999 10W-30 Full Synthetic

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Want better insight into how your engine is breaking in or wearing over time? Wondering whether your oil is still protecting the way it should? Looking to catch potential issues before they become bigger problems? PartsVu has partnered with Blackstone Laboratories and now offers professional oil analysis kits. Results are typically delivered by email within a few days. Shop now. Yamaha F25 300 Hour Service Maintenance Kit - Yamalube 10W-30 Full Synthetic - 1998-1999 Keep your Yamaha F25 outboard ready for dependable performance with this 300 Hour Service Maintenance Kit. Designed for 1998-1999 F25 models, this kit includes the main service components needed for a more complete maintenance interval, including engine oil, oil filtration, lower unit service items, fuel filtration, spark plug replacement, thermostat service, and cooling system maintenance. Built around Yamalube 10W-30 Full Synthetic FC-W marine engine oil, this bundle helps simplify scheduled service by pairing the correct lubricants with Yamaha service parts, NGK spark plugs, replacement gaskets, thermostat components, and a Yamaha F25 water pump repair kit. It is a practical way to stay organized during 300 hour maintenance without sourcing each item separately. Key Features Complete 300 hour service kit for Yamaha F25 outboards from 1998-1999 Includes Yamalube 10W-30 Full Synthetic FC-W marine engine oil for dependable lubrication Yamaha oil cleaner element, fuel filter, thermostat, thermostat cover gasket, and water pump repair kit included Marine gear case lube helps support lower unit protection and smooth operation NGK spark plugs help promote reliable ignition and consistent engine performance Cooling system components help support proper operating temperature and water flow Bundled package helps make larger scheduled maintenance intervals easier and more organized What This Kit Contains Qty 1: 3FV-13440-30-00 - Yamaha Element Assembly, Oil Cleaner Qty 1: 61N-W0078-14-00 - Yamaha F25 Water Pump Repair Kit Qty 1: 62Y-12414-00-00 - Yamaha Thermostat Cover Gasket - F9.9-2 T9.9-2 F15 F25 T25 F30 F40 F50 T50 F60 T60 F70 Qty 1: 65W-24251-10-00 - Yamaha In Line Fuel Filter - For Engine Models F30 & F40 2000 & Newer Qty 1: 66M-12411-01-00 - Yamaha Thermostat - F60 T60 F50 T50 F40 F15 F4 F6 F8 F9.9 Qty 2: 90430-08003-00 - Yamaha Outboard Lower Unit Drain Gasket Qty 1: 90430-14M09-00 - Yamaha Oil Plug Drain Gasket Qty 1: ACC-GEARL-UB-QT - Yamalube Marine Gear Case Lube Oil, 32 oz. Qty 2: QBL-10W30-FS-12 - Yamalube 10W30 Outboard Mineral 4M FC-W Marine Engine Oil Quart Qty 2: PV452124 - NGK Spark Plugs, #5531 - DPR6EA9 Engine Compatibility Yamaha F25 – 1998-1999 Why Choose a Complete Service Kit? A complete service kit makes larger maintenance intervals easier by keeping the required service items together in one package. It helps reduce the chance of missing important parts, saves time during prep, and gives DIY boat owners and professional technicians the core components needed before service begins. Performance Benefits Routine 300 hour maintenance helps protect the systems your outboard depends on most. Fresh engine oil supports internal lubrication and helps reduce wear. Replacing the oil and fuel filters helps keep contaminants away from key engine systems. New spark plugs support dependable ignition and efficient combustion. Gear case lube helps protect lower unit gears and bearings, while the thermostat and water pump repair kit help support proper cooling system performance. FAQ Is this kit specific to certain Yamaha F25 models? Yes. This kit is designed for Yamaha F25 outboards produced from 1998-1999. Is this a complete 300 hour service kit? Yes. It includes engine oil, oil filter, fuel filter, spark plugs, drain gaskets, gear case lube, thermostat service parts, and a water pump repair kit. Does this kit include cooling system service parts? Yes. This kit includes a thermostat, thermostat cover gasket, and Yamaha F25 water pump repair kit to help support cooling system maintenance. Does this kit include lower unit service parts? Yes. It includes Yamalube gear case lube and lower unit drain gaskets for routine lower unit maintenance. Why are spark plugs included in a 300 hour kit? Replacing spark plugs during scheduled service helps support reliable ignition, clean combustion, and consistent engine performance.

Description and specifications supplied by Yamaha Online Parts.