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

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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

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