MAINTENANCE
High speed jet H
Checking the front hand guard
At the factory the engine is adjusted at sea level.When
working at a high altitude or in different weather
conditions, temperatures and atmospheric humidity, it
may be necessary to make minor adjustments to the high
speed jet.
Make sure the front hand guard is not damaged and that there
are no visible defects such as cracks.
CAUTION! If the high speed jet is screwed in too far, it
may damage the piston/cylinder.
When test run at the factory, the high speed jet is set so that
the engine satisfies the applicable legal requirements at the
same time as achieving maximum performance. The
carburetor’s high speed jet is then locked using a limiter cap
in the fully screwed out position. The limiter cap limits the
potential to adjust the high speed jet to at most half a turn.
Move the front hand guard forwards and back to make sure it
moves freely and that it is securely anchored to the clutch cover.
CAUTION! There is an integrated speed governor in the
ignition system that limits the maximum speed to 13000 rpm.
The maximum speed will not exceed 13000 rpm when the
high speed jet is adjusted (screwed in). When the speed
governor is activated, you will get the same sound experience
as when the chain saw 4-cycles.
To adjust the carburetor correctly you should contact a
mechanic with access to a rev counter.
Checking the inertia brake release
CAUTION! As the spark is cut off, the rev counter does not
show speeds higher than 13000 rpm.
Correctly adjusted carburetor
With the engine turned off, hold the chain saw over a stump
or other firm object. Let go of the front handle so that the bar
drops towards the stump as the chain saw rotates around the
rear handle.
When the carburetor is correctly adjusted the machine
accelerates without hesitation and the machine 4-cycles a
little at max.speed.It is also important that the chain does not
rotate at idle. If the L-jet is set too lean it may cause starting
difficulties and poor acceleration.If the H-jet is set too lean the
machine will have less power, poor acceleration and could
suffer damage to the engine.
Checking,maintaining and servicing
chain saw safety equipment
Note! All servicing and repair work on the machine requires
special training. This is especially true of the machine′s
safety equipment. If your machine fails any of the checks
described below we recommend you to contact our
servicing dealer.
When the bar hits the stump the brake should be applied.
Chain brake and front hand guard
Checking brake band wear
Checking the brake trigger
Brush off any wood dust, resin and dirt from the chain brake and
clutch drum. Dirt and wear can impair operation of the brake.
Place the chain saw on firm ground and start it.Make sure the
chain does not touch the ground or any other object. See the
instructions under the heading Start and stop.
Regularly check that the brake band is at least 0.024 inch (0.6
mm) thick at its thinnest point.
30
– English
| Categories | Chainsaw Manuals, Husqvarna Chainsaw Manuals |
|---|---|
| Tags | Husqvarna 385XP, Husqvarna 390XP |
| Model Year | 2003, 2004, 2005, 2006, 2007 |
| Download File |
|
| Document Type | Operator's Manual |
| Language | English |
| Product Brand | Husqvarna, Chainsaw |
| Document File Type | |
| Publisher | husqvarna.com |
| Wikipedia's Page | Husqvarna |
| Copyright | Attribution Non-commercial |
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