CARBURETTOR
34 – English
EPA-models
7. Check that the H-cap is still adjusted to its richest setting.
(Turned counterclockwise to stop).
NOTE! The H-needle must not rotate!
8. Gently knock the H-cap into position. Use a 5 mm/0.2
inch mandrel (for ex. the locking pin for the bevel gear
ref.no. 502 02 61-03).
This is a basic carburettor adjustment. Further fine
adjustments, within the limits the caps allow, may be
necessary to achieve optimum performance. See the
Operator’s manual.
Replacement of the L-needle
1. Take off the cap from the L-jet using e.g. a pair of cutting
pliers and unscrew the needle.
2. Screw the new L-jet to the bottom and then turn it
counterclockwise ”D” turns.
Model 362XP D = 1
* Model 365 D = 1 1/2
Model 372XP D = 1
* L-jet is not capped and adjustments acc. to 3-9 should not be done.
3. Press a new L-cap on the L-jet to the first stop, which
means that the cap is not fixed to the needle, it should
rotate independently.
4. Adjust the L-cap to the richest position (turned counter-
clockwise to stop) without turning the needle.
5. Let the engine run at ~ ”E” app. 1 minute until warm and
then let it run on idle.
Model 362XP E = 13 000
Model 372XP E = 14 000
6. Adjust the idle speed to "F" rpm.
Model 362XP F= 2 700
Model 372XP F= 2 700
7. Adjust the L-needle until the highest possible idling
speed is achieved and then turn the L-needle 1/2 turn
counterclockwise. Use a narrow blade screwdriver w.
ref.no. 531 00 48-63 and insert through the hole in the
cap (max. blade width 2 mm/0.08 inch)
NOTE! If the chain rotates, turn the idling speed
screw (T) counterclockwise until the chain stops.
8. Check that the L-cap is still adjusted to its richest position.
(Turned counterclockwise to stop)
NOTE! The L-needle must not rotate!
9. Gently knock the L-cap into position.
Use a 5 mm/0.2 inch mandrel (for ex. the locking pin for
the bevel gear ref.no.502 02 61-03).
This is a basic carburettor adjustment. Further fine adjust-
ments, within the limits the caps allow, may be necessary to
achieve optimum performance. See the Operator’s manual.
Basic adjustment for EPA carburettors
After replacing the carburettor or high speed and/or low
speed needle on an EPA (The US Environmental Protection
Agency) certified product a basic adjustment must be carried
out as described below in order to meet the EPA-requirements.
This to achieve as low emissions as possible. This instruction
is made for USA only.
On EPA carburettors both the H and L-jets are fitted with
caps to prevent the chain saw operator from changing the
adjustment above EPA standard. The caps can be removed
to achieve richer or leaner adjustments. To set the jets
correctly an
adjustment sleeve
is fitted over the caps to lock
them in maximum allowed setting. When correctly set the
caps must be fixed on the jets. The adjustment sleeve then
can be removed.
NOTE! Before making any adjustments the following
must be done!
• Mount, for this model, approved bar & chain combination
(See Technical data in the Operator’s manual).
Model 362XP 15"
Model 365 18"
Model 372XP 20"
• The chain should not be tensioned more than that it
remains ~0,2 inches to the bar.
• Mount a new air filter.
Replacement of the H-needle or complete carburettor
1. Screw the new H-needle to the bottom and turn it
counterclockwise ”A” turns.
Model 362XP A = 3/4
Model 365 A = 3/4
Model 372XP A = 3/4
2. Check that:
• The H-cap is adjusted to its richest setting. (Turned
counterclockwise to stop.)
• The cap is not fixed to the needle, it should rotate
independently. Adjust the L-cap to a center position
(1/4 turn counterclockwise = minimum, 1/4 turn clockwise
= maximum ).
3. Start the engine. If necessary, adjust the idling speed with
the T-screw until the chain stops.
4. Adjust the H-needle to give a top speed of ”B” rpm.
Model 362XP B = 13 000
Model 365 B = 12 500
Model 372XP B = 13 500
Use a narrow blade screwdriver (Ref.no. 531 00 48-63)
and insert it through the hole in the cap
(max. blade width 2 mm/0.08 inch).
5. Let the engine run at 12 500 rpm ~1 minute, until warm.
6. Adjust the H-needle to a top speed of ”C” rpm.
Model 362XP C = 13 500
Model 365 C = 13 000
Model 372XP C = 14 000
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