Wacker Neuson DPU 6555He Operator's Manual page 34

Operation
Note: Do not activate automatic decompression lever while the engine is
running.
T01006GB.fm
* Let loose of the safety starting crank immediately and stop the
engine if it should start turning in the wrong direction (smoke coming
from the air filter) after a back kick.
Wait until the engine stops before repeating the starting procedure.
5. The charge control lamp (27) must turn off immediately after the
engine has started running and the acoustic alarm has stopped.
Stop the engine immediately in case of eventual irregularities, then
locate the fault and repair it.
The machine will start vibrating as soon as the engine starts revving
up.
6. Bring the engine up to maximum rpm's and then check the air filter's
service indicator (also see chapter on „Maintenance"); clean the
dry-type air filter if necessary.
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