Marine Engine
Cummins 6BT5.9 Marine Diesel Engine (107–134 hp)
Cummins 6BT5.9 6-cylinder diesel engine, 107–134 hp (80–100 kW), 4 ratings for marine work. Each unit nameplate-verified.
Specifications
- Engine Model
- 6BT5.9-GM80 ~ GM100
- Cylinders & Configuration
- Inline 6, 4-cycle
- Rated Power Range
- 80–100 kW (107–134 hp) @ 1500–2200 rpm
- Aspiration
- turbocharged
- Applications
- Marine
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins 6BT5.9 is a 6-cylinder Cummins diesel engine supplied in 4 factory ratings from 107 hp (80 kW) to 134 hp (100 kW). Every rating listed on this page is a complete engine for marine duty, not a generator set, and each unit ships with its serial number recorded against the specification sheet that applies to it.
Ratings in this family differ in rated speed, peak torque and emissions tier rather than in displacement or cylinder count, so the choice between them is a duty-matching question. The specifications panel and the per-rating entries on this page are generated from the same source data, so a rating quoted here can be matched directly against a delivery document.
Specifications
The specifications panel lists the family-level values that are common to every 6BT5.9 rating. Ratings that share displacement and cylinder count but differ in output are listed individually in the model selection section.
Model Selection: 6BT5.9 Ratings
Each entry in this section is one rating of the Cummins 6BT5.9. The rated power is the output at the stated speed; the peak torque figure is the value the rating develops at the lower speed shown, which is what normally decides whether a rating suits a given machine. Each rating carries a stable anchor, so a single rating can be linked or quoted directly.
6BT5.9-GM80
6BT5.9-GM80 — rated 80 kW (107 hp) at 1500 rpm; peak torque 88 N·m at 1500 rpm.
6BT5.9-GM83
6BT5.9-GM83 — rated 83 kW (111 hp) at 1500 rpm; peak torque 92 N·m at 1500 rpm.
6BT5.9-M120
6BT5.9-M120 — rated 90 kW (120 hp) at 2200 rpm; peak torque 100 N·m at 2270 rpm.
6BT5.9-GM100
6BT5.9-GM100 — rated 100 kW (134 hp) at 1800 rpm; peak torque 110 N·m at 1800 rpm.
Applications
6BT5.9 engines in this family are normally specified for marine work.
Marine: ratings are quoted against the propulsion or auxiliary duty required, with the gearbox ratio and the duty classification taken into account.
Verification, Documentation and Ordering
Each engine is offered with nameplate verification + load-test record per serial number. That means the model and rating printed on the engine nameplate can be checked against the record issued for that serial number before shipment, which is the point most buyers of re-rated or re-exported engines want covered.
To receive a quotation, send the exact rating from the matrix above (for example 6BT5.9-GM100), the machine or application it will drive, the quantity, and the destination port. If the rating you need is not listed, send the model and the required output and we will confirm whether it belongs to this family or to a neighbouring one.
Buyer tip: Send your 6BT5.9 specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What is the power range of the 6BT5.9?
The 4 ratings listed on this page run from 107 hp (80 kW) to 134 hp (100 kW), at governed speeds between 1500 and 2200 rpm.
What is the difference between 6BT5.9-M120 and 6BT5.9-GM100?
6BT5.9-M120 is rated 90 kW (120 hp) at 2200 rpm with peak torque of 100 N·m, while 6BT5.9-GM100 is rated 100 kW (134 hp) at 1800 rpm with 110 N·m. They use the same base engine; the higher rating is the one to specify when the driven load needs the extra torque at the lower speed.
How is a 6BT5.9 rating ordered?
Send the exact rating shown in the model selection table, the application it will drive, the quantity and the destination port. The engine is then quoted against that rating and confirmed against its nameplate and load-test record.
