English / USA
Operating Instructions
Cleaning the Air Filter
During break-in period
A factory new machine should not be run
at high revs (full throttle off load) for the
first three tank fillings. This avoids
unnecessary high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
engine are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
1
2
1
3
5
4
During operation
After a long period of full-throttle
operation, allow engine to run for a while
at idle speed so that the heat in the
engine can be dissipated by flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
Dirty air filters reduce engine power
increase fuel consumption and make
starting more difficult.
:
Remove the main filter (3) from the
cover and inspect it –
if it is dirty or damaged, fit a new
one.
After finishing work
Wait for engine to cool down. Drain the
fuel tank. Store the machine in a dry
place. Check tightness of nuts and
screws (not adjusting screws) at regular
intervals and retighten as necessary.
If there is a noticeable loss of engine
power
Turn choke knob to g
:
:
:
Always install a new prefilter when
you change the main filter.
:
:
Take the prefilter (4) out of the filter
Release the screws (1) and pull
cover.
off the filter cover (2).
If the prefilter is wet, dry it – then
knock it out on the palm of your
hand or blow out with compressed
air.
:
Always replace a damaged prefilter.
BR 420
19
| Categories | Blower Vacuum and Sweeper Manuals, STIHL Blower and Vacuum Manuals |
|---|---|
| Tags | STIHL BR 420 |
| 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, Blower Vacuum |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)