Stihl RZ Zero-Turn Mowers
9 fault codes documented
Brake will not hold
The mower's brake is not effectively stopping or holding the unit in place. This could be due to improper adjustment or worn brake pads.
Engine exhaust is black
The engine is producing black smoke from the exhaust. This usually means the engine is not getting enough air or the fuel mixture is too rich.
Engine knocks
The engine is making a knocking sound during operation. This typically indicates an issue with the oil level or type.
Engine runs but mower will not drive
The engine starts and runs, but the mower does not move when the controls are engaged. This could be related to transmission engagement, belts, or brakes.
Engine starts hard or runs poorly
The engine has difficulty starting, or it runs unevenly once it is running. This could be related to the fuel mixture or the spark plug.
Engine will not turnover or start
The mower's engine is not starting or turning over when you try to start it. This can be due to several safety interlocks or system issues.
Excessive oil consumption
The engine is using more oil than expected. This could be due to overheating, incorrect oil weight, or overfilling the crankcase.
Unit drive belt slips
The drive belt for the mower is slipping, which can cause loss of power or prevent the mower from moving correctly. This is often due to contamination, incorrect tension, or belt wear.
Unit steers or handles poorly
The mower is difficult to steer or does not handle as expected. Check for loose steering components or improper tire inflation.