Yanmar 3JH2E Maintenance Oil Change, Oil Filter and Fuel Filter Service

Thu, 09 Apr 2026 12:01:21 +0000

In this video I carry out a full service on my Yanmar 3JH2E boat engine aboard my sailboat, a Hunter Legend 376

What started as a simple maintenance job quickly turned into one of those typical boat days… where nothing goes exactly as planned. During this service I change the engine oil, oil filter, diesel fuel filters, and bleed the diesel system before starting the engine again.

If you own a Yanmar marine diesel engine, this is a real-life look at basic maintenance you’ll eventually need to do on your boat.

And yes… there are spills, frustration, and a few things going wrong along the way. Just another normal day of boat maintenance.

What’s done in this video

Engine oil change

Oil filter replacement

Diesel fuel filter replacement

Bleeding the diesel system

First engine start after the service

All done on a Yanmar 3JH2E marine diesel engine.
Special thanks for his support to Xavi Villanueva
@konikoni123

Chapters

00:00 Intro
00:45 Preparing the engine service
02:05 Draining the engine oil
03:26 Installing the new oil filter
08:09 Refilling with fresh engine oil
09:43 changing oil in the gear box
14:35 purifying the fuel
16:04 Changing the diesel fuel filters
24:49 Priming and bleeding the diesel system
26:40 Starting the engine after the service
28:42 Wrapping up the job

Boat engine in this video

Yanmar 3JH2E marine diesel engine

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