Starting And Stopping The Engine - Stihl MS 651 Instruction Manual

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► When the tank is no longer under pressure:
Turn the fuel tank cap counterclockwise until
the marks on the cap and fuel tank are in
alignment.
► Remove the fuel tank cap.
NOTICE
■ Exposure to light, direct sunlight and extreme
temperatures may accelerate fuel separation
or aging. Topping the chainsaw up with
unmixed or older fuel may damage the chain‐
saw.
► Thoroughly mix the fuel before topping up.
► Do not top up with fuel stored for more than
30 days (STIHL MotoMix: 5 years).
► When topping up, ensure that no fuel is spil‐
led and that the fuel level remains at least
15 mm under the edge of the tank.
► If the handle on the fuel tank cap has dropped
into the closed position: Fold out the handle.
1
2
► Place the fuel tank cap in the filler opening so
that mark (1) lines up with mark (2).
► Press the fuel tank cap down and rotate it
clockwise until it stops.
The fuel tank cap snaps into place. Mark (1) is
in line with mark (4) and points to mark (3).
► Check to see if the fuel tank cap can be pulled
up and off.
► If the fuel tank cap cannot be pulled up and
off: Fold the handle flat to the top of the cap.
The fuel tank is closed.
If the fuel tank cap can be pulled up and off, per‐
form the following steps:
► Place the fuel tank cap in the filler opening – in
any position.
14
► Press the fuel tank cap down and rotate it
► Press the cap down and rotate it counterclock‐
► Now try again to close the fuel tank.
► If the fuel tank still cannot be closed properly:
9.1
4
1
When must the engine be prepared for starting?
The engine must be prepared for starting if one
of the following conditions apply:
– The engine is at ambient temperature.
3
– The engine stopped when accelerated for the
– The engine stopped because the fuel tank was
► Prepare engine for start,
When can the engine be started without prepara‐
tion?
The engine can be started without preparation if
it has been running for at least 1 minute and only
shut down for a short work break.
► Starting the engine,
9.2
► Select the correct starting procedure.

9 Starting and Stopping the Engine

A
B
clockwise until it stops.
wise until mark (1) points to mark (2).
Do not use the chainsaw and contact a STIHL
dealer for assistance.
The chainsaw is not in a safe condition.
9
Starting and Stopping the
Engine
Selecting the correct starting
procedure
first time.
empty.
the engine,
9.3.
Preparing Engine for Start
1
2
C
1
2
9.2 and then start
9.3.
5
3
4
0458-784-0121-C

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