HomeGeneracGenerac MLG8K

Generac MLG8K Generator Set

The Generac MLG8K is a 9 kW (9 kVA) Diesel standby generator set powered by a Kubota D1105-E3BG engine. It is available at 120/240 V, single-phase, 60 Hz and rated 37 A. It holds about 5.1 L (1.3 gal) of oil and 4.2 L (1.1 gal) of coolant, with a maximum ambient rating of 49 °C. The set measures 1651.27×1727.2×1422.44 mm (65.0×68.0×56.0 in) and weighs about 467 kg (1030 lb). The same D1105-E3BG engine also powers generator sets from John Deere and Magnum.

9 kW
Standby
1.12 L
Displacement
5.1 L
Oil capacity
2
Document types

How to read your Generac serial & model number →

Typical fuel consumption for 5–10 kW Diesel generators →

Compare with other 5–10 kW Diesel generators →

Service parts for the MLG8K

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required

Fuel system

1 required
16686Fuel filtersee priceeBay

Oil system

1 required

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power9 kW
Standby kVA9
Prime power8 kW
EmissionsTier IV Final
Oil capacity5.1 L
AlternatorMarathon 332CSA/B3018
Voltage options120/240 V
PhaseSingle Phase
Rated current37 A
Power factor1.0
Circuit breaker50 A
Coolant capacity4.2 L
Max ambient49 °C
Dimensions (L×W×H)1651×1727×1422 mm
Dry weight467 kg
Tank runtime80 hr

Engine

Kubota D1105-E3BG
Oil capacity5.1 L
Coolant capacity4.5 L
Displacement1.12 L
AspirationLiquid Cooled Diesel
Rated speed1800 rpm

Maintenance & consumables

for the Kubota D1105-E3BG
ItemSpecCapacityPart #Interval
Air filterDry type cartridge16444 Amazon $370.99 eBay
Fuel filterReplaceable element16686500 hr eBay
Oil filterSpin-on type16691250 hr Amazon $42.50 eBay
Battery
Belt
Coolant
OilChange the engine oil and oil filter after the initial 50 hours of operation, then at the appropriate interval thereafter.50 hr
Spark plug

Common questions

What size generator is the Generac MLG8K?

The Generac MLG8K is rated 9 kW standby (9.0 kVA).

Which engine powers the Generac MLG8K?

The Generac MLG8K is powered by the Kubota D1105-E3BG engine.

What kind of fuel does the Generac MLG8K run on?

The Generac MLG8K runs on Diesel.

How much oil does the Generac MLG8K take?

The Kubota D1105-E3BG engine in the Generac MLG8K has an oil capacity of 5.1 liters.

What alternator does the Generac MLG8K use?

The Generac MLG8K uses a Marathon 332CSA/B3018 alternator.

What oil filter fits the Generac MLG8K?

The Generac MLG8K uses oil filter part number 16691.

Which fuel filter part number does the Generac MLG8K take?

The Generac MLG8K uses fuel filter part number 16686.

What air filter does the Generac MLG8K use?

The Generac MLG8K uses air filter part number 16444.

Parts

1
Part #DescriptionQtySystem
10585GService part / kit Amazon eBay

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime50%5.01.32
Prime75%7.612.01
Prime100%10.032.65

Available documents

Spec sheet — mlg8k mobile-diesel-generator-set spec-sheet (Generac)Parts manual — Generac Mobile Diesel Generator Brochure (Generac)Service manual — mlg8k-ops-03-19-14-10585g-a (Power Products)
Full service, cheapest listings

Priced items from this model's own parts manual.

Air filter 16444$370.99
Oil filter 16691$42.50
2 priced items$413.49