6AY Series 659 – 911mhp
Commercial Engines
Yanmar 6AYM Series Marine Diesel Engine (659 – 911hp)
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Low Fuel & Low Emissions
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High Torque Characteristic
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Excellent Durability and Reliablity
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Easy to Maintain
Engine Model
- 6AYM-WST (H-rating) 659mhp @ 1900rpm
- 6AYM-WET (M-rating) 829mhp / (H-rating) 755mhp @ 1840rpm
- 6AYM-WGT (L-rating) 911mhp @ 1938rpm
Good economy
To achieve the desired workboat level of operating economy. Result. Maximum fuel efficiency with low fuel consumption across a previously unheard of range of use conditions.
Lower emissions
To minimise adverse effect on the environment. Result. Lower NOx, SOx, CO, less particulates, significantly less black smoke, particularly at idle or during hard acceleration.
High torque
To achieve the desired workboat responsiveness. Result. Stable high torque in middle and high speed ranges for reliable work performance.
The engine performance gives following advantages:
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Stable cruising with least speed reduction against sudden load changes
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A wide range propeller matching, from the passenger ship(light/medium duty) to tug boat(heavy duty), is possible
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Economical with wide min.fuel consumption range both during cruising or performing job duties
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Produces stable engine performance even doing other duties
Excellent reliability and durability
To create a tough engine requiring minimum downtime. Result. Outstanding engine durability made possible by extra-stable lube oil consumption and long life fuel valves at the tip of each injector.
Easy to maintain
Because it’s a Yanmar. Result. The same compactness and ease of maintenance as ever.

Line Drawing
- 6AYM-WST-Bobtail
- 6AYM-WST-YX181
- 6AYM-WST-YX180L
- 6AYM-WET-YXH240L
- 6AYM-WET-BOBTAIL
- 6AYM-WET-YXH240L
- 6AYM-WST-YXH240L
- 6AYM-WGT-BOBTAIL
- 6AYM-WGT-YXH240
SPECIFICATIONS SHEET
AUTOCAD DRAWING
BROCHURE
Testimonials
Power Profile
- Commercial Fishing - Prawn - Warlock
- Commercial Landing Craft - Statesman
- Commercial Fishing - Cray - Silver Mist
- Commercial Fishing - Abalone - Diamax
- Private/Charter Fishing - Strictly Business
- Commercial Fishing - Crab - Intution
- Commercial - Pearl Shell Carrier - Montoro
- Commercial Fishing - Cray/Shark - Southern Image
- Passenger Ferry - Freedom Monarch
- Passenger Ferry - Spirit of Hervey Bay
- Passenger Ferry - Fantasea Sunrise
- Passenger Ferry - Fantasea Dreamer
- Commercial - Prawn Trawler - Emserve
- Commercial - Long Liner
- Passenger Ferry - MEC Avalon
- Passenger Ferry - ABA South Sea Cruises
- Passenger Ferry - Cobia
- Private/Charter Fishing - Aussie Warrior
- Charter Fishing - Blue Strike
- Passenger Ferry - Explore NZ11
- Passenger Ferry - Freedom Sovereign
- Commercial - Reef Ranger
- Commercial Fishing - Petuna Endeavour
- Commercial - Expedition Cruises Coral Princess
- Passenger Ferry - Louise Sauvage
- Commercial - Warrego
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