GAS GAS MC 85 2023 Owner's Manual page 104

16 SERVICE WORK ON THE ENGINE
102
Danger
Danger of poisoning Exhaust gases are toxic and inhaling
them may result in unconsciousness and death.
–
Always make sure there is sufficient ventilation when
running the engine.
–
Use effective exhaust extraction when starting or run-
ning the engine in an enclosed space.
–
Start the engine and check it for leaks.
Finishing work
–
Check the gear oil level. ( p. 100)