Save $$$ Servicing Your Own 15HP Mercury Outboard (4-Stroke) Episode 494

In this episode we walk through a full service on our 15HP Mercury 4-stroke outboard — the little workhorse that gets us to shore, hauls dinghy loads, and has to keep running when we're a long way from the nearest mechanic. If you own this engine (or any small 4-stroke outboard), this is the maintenance you can absolutely do yourself. We cover changing the engine oil, the gearbox/lower unit oil, the spark plug, fuel filter, and the bits people forget — plus the tools you'll need and a few mistakes to avoid. Doing your own outboard service saves a small fortune and means you actually know your engine when something goes wrong offshore. ⏱️ CHAPTERS 00:00 Intro [01:17] Tools & oil you'll need [04:18] Changing the gearbox / lower unit oil [09:00] Changing an impeller [15:32] Draining the engine oil [17:20] fuel filter [19:59] Refill the oil [21:48] Spark plugs [23:57] installing a hour meter 🛠️ GEAR & OILS WE USED Engine oil – https://westmarine.sjv.io/n4o7Ma Gear box oil - https://westmarine.sjv.io/GbGvM6 oil filter – https://westmarine.sjv.io/n4o7Ma Impeller - https://westmarine.sjv.io/DWn2vG Grease - https://westmarinecreator.pxf.io/ZVBZaW Spark plugs - https://westmarine.sjv.io/R0mkMy You can find all the gear and more here https://westmarine.sjv.io/c/5947521/3373502/ 🌊 JOIN THE CREW We're about to cross from Panama to French Polynesia — roughly 4,000nm across the Pacific. Come along: https://crossing.sailingcatalpa.com ❤️ SUPPORT THE CHANNEL Patreon: https://www.patreon.com/sailingcatalpa 📲 FOLLOW ALONG Instagram: https://www.instagram.com/sailingcatalpa Facebook: https://www.facebook.com/sailingcatalpa Tiktok: https://www.toktok.com/sailingcatalpa Website: https://www.sailingcatalpa.com