6BY2-220
The Yanmar 6BY2-220 is a 220 mhp (162 kW) 3.0-litre 6-cylinder BMW-derived common-rail turbo diesel rated at 4000 rpm, the second-generation BY engine (about 2008-2013), sold for inboard gears or sterndrive, including Yanmar's ZT350.
The 6BY2-220 belongs to the BY2 series (4BY2-150, 4BY2-180, 6BY2-220, 6BY2-260), which Yanmar announced as the successor to the original BY series, 'available end of 2008'. The outputs stayed the same - 150 and 180 mhp from the 1.995-litre four and 220 and 260 mhp from the 2.993-litre six, all at 4000 rpm - but Yanmar listed a fully water-jacketed exhaust manifold, turbocharger and heat-exchanger changes, a metal top cover, a glow-plug controller, a combined fuel manifold, a new two-piece flywheel housing and ECU software changed from torque to speed control for smoother running and better twin-engine synchronisation.
Inboard versions were listed with the Kanzaki KMH50A or KMH50V gearbox. The Z-suffix sterndrive versions could be ordered with Yanmar's own ZT350 sterndrive, which Yanmar developed for the BY2 and LP engines, and BoatTEST also mentions MerCruiser Bravo legs as a pairing.
The BY2 appears on Yanmar's line-up until 2012-2013, when it gave way to the BY3 series with the same ratings. BoatTEST's review of the 4BY2-180 notes its use in small trawlers, sports boats over 20 ft and petrol-to-diesel repowers.
Specifications
Power
- Power
- 220 hp
- Power (kW)
- 162 kW
- Rated speed
- 4000 rpm
Engine
- Configuration
- inline 6
- Cylinders
- 6
- Displacement
- 2.993 L
- Aspiration
- turbo, intercooled
- Weight
- 315 kg
- Fuel
- Diesel
- Mounting
- Inboard
Reviews
No independent reviews on file yet.
Sources
- 1. YANMAR Marine Product Guide 2009-2010 — Yanmar
- 2. New-generation BY2 series diesels (news) — Yanmar
- 3. Powerboat engines line-up (yanmarmarine.com, Jan 2011) — Yanmar
- 4. Powerboat engines line-up (yanmarmarine.com, Jun 2012) — Yanmar
- 5. Powerboat engines line-up (yanmarmarine.com, Jul 2013) — Yanmar
Specifications compiled from manufacturer sources.