The Kubota M6121 coolant capacity is listed as 3.3 gal (12.5 L). It also lists coolant type ethylene glycol-based coolant and Kubota Genuine Coolant and antifreeze mix 50/50 coolant and water mix.
Coolant capacity3.3 gal (12.5 L)
Coolant typeethylene glycol-based coolant and Kubota Genuine Coolant
Antifreeze mix50/50 coolant and water mix
Kubota M6121 Coolant Capacity
Cooling system capacity
3.3 gal (12.5 L)
Coolant type
ethylene glycol-based coolant and Kubota Genuine Coolant
Antifreeze mix
50/50 coolant and water mix
Engine model
V6108
Engine horsepower
150 hp (111.9 kW)
Engine displacement
6.1 L (372.2 cu in)
Coolant Capacity Comparison Chart
Coolant capacity comparison
This model
3.3 gal
Average
4 gal
Low
2 gal
High
8 gal
Engine horsepower comparison
This model
150 hp
Average
140 hp
Low
80 hp
High
240 hp
Engine displacement comparison
This model
6.1 L
Average
6 L
Low
3 L
High
10 L
Kubota M6121 Coolant and Engine Notes
Coolant capacity note
The Kubota M6121 coolant spec points to 3.3 gal (12.5 L). Do not rely on the radiator-only amount if the full cooling-system capacity is available
Coolant type note
Coolant type for the Kubota M6121 is listed as ethylene glycol-based coolant and Kubota Genuine Coolant. The safest move is to use coolant that matches the manual’s spec rather than mixing random formulas
Antifreeze mix note
The 50/50 coolant and water mix mix gives the Kubota M6121 coolant system a sensible balance of freeze protection, boil protection and corrosion protection
Engine context note
The Kubota M6121 engine data captured here is engine model V6108, engine horsepower 150 hp (111.9 kW), and displacement 6.1 L (372.2 cu in). Bigger engines usually need more coolant and more careful refill bleeding
Refill note
When refilling the Kubota M6121, use 3.3 gal (12.5 L) as the planning number and 50/50 coolant and water mix as the mixture guide. Recheck the level after the thermostat opens
Kubota M6121 Coolant Capacity FAQ
What is the Kubota M6121 coolant capacity?
The Kubota M6121 coolant capacity is listed as 3.3 gal (12.5 L) for cooling system capacity. Use this as the refill planning number and confirm the final level at the radiator or overflow bottle.
Can I use any coolant in the Kubota M6121?
No. Use ethylene glycol-based coolant and Kubota Genuine Coolant or a coolant that clearly matches the manual’s required spec. Wrong coolant can create corrosion, deposits or seal problems.
Is premixed coolant okay for the Kubota M6121?
Premixed coolant can be fine if it matches ethylene glycol-based coolant and Kubota Genuine Coolant and the required mix. The captured mix for the Kubota M6121 is 50/50 coolant and water mix.
How often should I change coolant in the Kubota M6121?
The captured coolant change interval for the Kubota M6121 is the service interval in the operator manual. If service history is unknown, changing it is usually smarter than guessing.
What engine specs affect Kubota M6121 coolant capacity?
The captured engine context is engine model V6108, horsepower 150 hp (111.9 kW), and displacement 6.1 L (372.2 cu in). Engine size is one reason coolant capacity changes between tractors.
Official information note
Mistakes do happen. Tractor coolant specs can change by year, market, engine, radiator, cab/heater setup and service procedure. Please check the operator manual, decal information and official kubotausa.com website for official information before draining or refilling the cooling system.
