English / USA
Adjusting the Carburetor
General Information
Standard Setting
Your carburetor is preset at the factory
with the standard setting.
Carburetor with
H = 1 and
L = 1
Carburetor with
3
H = / and
4
1
L = /
This setting is designed to provide an
optimum fuel-air mixture under most
operating conditions.
4
The high speed screw alters the
engine’s power output and the maximum
off-load engine speed.
H
L
H
H
L
L
If the setting is too lean there is
a risk of engine damage due to
insufficient lubrication and
overheating.
:
:
Shut off the engine.
:
:
Shut off the engine.
If the carburetor has to be adjusted from
scratch, first carry out the standard
setting.
Check the air filter and clean or
Check the air filter and clean or
replace if necessary.
replace if necessary.
:
:
Check the spark arresting screen* in
the muffler and clean or replace if
necessary.
Carefully screw both adjusting
screws down onto their seats
(clockwise).
:
:
:
Check the spark arresting screen* in
the muffler and clean or replace if
necessary.
Turn high speed screw (H)
counterclockwise as far as stop (no
3
more than / turn)
4
:
:
Open high speed screw (H) one full
Turn the low speed screw (L)
turn.
clockwise as far as stop, then turn it
1
back / turn.
Open the low speed screw (L) one
4
full turn.
*
see "Guide to Using this Manual"
*
see "Guide to Using this Manual"
MS 650, MS 660
44
| Categories | Chainsaw Manuals, STIHL Chainsaw Manuals |
|---|---|
| Tags | STIHL MS 650, STIHL MS 660 |
| Download File |
|
| Language | English, Español |
| Product Brand | STIHL. Stihl Inc, USA - Corporate phone: (757) 486-9100. International Support Information: http://stihl.com Email: info@stihl.com, Chainsaw |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
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