The Cub Cadet 123 coolant capacity is listed as 2.44 gal (9.2 L). It also lists coolant type ethylene glycol-based coolant and antifreeze mix 50/50 coolant and water mix.
Coolant capacity2.44 gal (9.2 L)
Coolant typeethylene glycol-based coolant
Antifreeze mix50/50 coolant and water mix
Cub Cadet 123 Coolant Capacity
Cooling system capacity
2.44 gal (9.2 L)
Coolant type
ethylene glycol-based coolant
Antifreeze mix
50/50 coolant and water mix
Engine model
K301
Engine horsepower
12 hp (8.9 kW)
Engine displacement
0.5 L (29 cu in)
Coolant Capacity Comparison Chart
Coolant capacity comparison
This model
2.44 gal
Average
2 gal
Low
1 gal
High
4 gal
Engine horsepower comparison
This model
12 hp
Average
18 hp
Low
10 hp
High
30 hp
Engine displacement comparison
This model
0.5 L
Average
0.9 L
Low
0.5 L
High
1.5 L
Cub Cadet 123 Coolant and Engine Notes
Coolant capacity note
The Cub Cadet 123’s key coolant figure here is 2.44 gal (9.2 L) for cooling system capacity. Use that before buying coolant or draining the system
Coolant type note
Coolant type for the Cub Cadet 123 is listed as ethylene glycol-based coolant. The safest move is to use coolant that matches the manual’s spec rather than mixing random formulas
Antifreeze mix note
The Cub Cadet 123 antifreeze mix is listed as 50/50 coolant and water mix. That is the normal protection range for freezing, boiling and corrosion control
Engine context note
For the Cub Cadet 123, the supporting engine specs are engine model K301, engine horsepower 12 hp (8.9 kW), and displacement 0.5 L (29 cu in). Use them as context beside the coolant capacity, not as a replacement for the manual
Refill note
When refilling the Cub Cadet 123, use 2.44 gal (9.2 L) as the planning number and 50/50 coolant and water mix as the mixture guide. Recheck the level after the thermostat opens
Cub Cadet 123 Coolant Capacity FAQ
What is the cooling system capacity of the Cub Cadet 123?
The Cub Cadet 123 cooling system capacity is shown as 2.44 gal (9.2 L). That is the number to use before draining the system.
What coolant type should I use in the Cub Cadet 123?
Use ethylene glycol-based coolant. The blunt rule is simple: match the manual’s coolant spec and do not mix unknown coolant formulas.
Should I use straight water in the Cub Cadet 123?
Not for normal long-term use. The Cub Cadet 123 should use 50/50 coolant and water mix or the manual’s specified coolant mix so the system gets corrosion, freeze and boil protection.
Does old coolant matter in the Cub Cadet 123?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Cub Cadet 123 is the service interval in the operator manual.
Why does the Cub Cadet 123 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Cub Cadet 123, the supporting engine data is engine model K301, horsepower 12 hp (8.9 kW), and displacement 0.5 L (29 cu in).
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 cubcadet.com website for official information before draining or refilling the cooling system.
