Yanmar Cruising yacht workhorse
Yanmar JH Series – Common Rail
39–110 hp · Modern common-rail power for cruising yachts
The common-rail JH is the modern face of Yanmar’s best-loved cruising engine, electronic three and four-cylinder diesels from around 39 up to 110 horsepower, smoother and cleaner than the mechanical JHs before them.
Because they’re fully electronic, they reward proper dealer diagnostics. As a Yanmar dealer we read them with SmartAssist and fix the cause, not the symptom.
Who it’s for: Cruising yacht and powerboat owners running a common-rail 3JH40, 4JH45, 4JH57, 4JH80 or 4JH110.
Models in this series
Not sure which you’ve got? Tell us the number off the rocker cover or the plate and we’ll sort it.
What we do
Looking after your JH – Common Rail
- Servicing and repairs for the electronic common-rail JH range.
- SmartAssist dealer diagnostics for fault codes and live engine data.
- High-pressure fuel injection, cooling and heat-exchanger work.
- Genuine common-rail JH parts and service kits on the shelf.
Related services
How we can help
Phil’s tips
Straight from the workshop
Tether the key to the sea cock
If you close the sea cock for the engine every time you leave the vessel, leave the engine key tethered to the sea cock handle. You physically cannot start the engine without opening the water first.
Let it warm up
Always let your engine warm up before working it. A few minutes at the dock gives the oil time to circulate, and you will get a better service life out of the engine for it.
Or call Phil: 0420 363 077