Stihl MS 390 User Manual

66 MS 290, MS 310, MS 390
: Pull the tank vent (1) (if fitted) out
of the grommet (2).
: Pull the hose (3) off the tank
vent (1).
209RA047
VA
2
3
1
: Remove the carburetor with
grommet.
– Pull the grommet off the
carburetor.
Install in the reverse sequence.
VA
209RA048
: Check that the washer (1) and
sleeve (2) are in place and
correctly seated.
Install all other parts in the reverse
sequence.
VA
209RA050
1
2
: Where applicable, fit baffle(1)
with the word ”TOP” (arrow)
facing outwards.
209RA201
VA
1
– Troubleshooting – b 4.5
In the case of problems with the
carburetor or fuel supply system,
also check and clean,
b 11.5.1 and 11.5.2.
The carburetor can be tested for
leaks with the carburetor and
crankcase tester 1106 850 2905.
– Remove the carburetor,
b 11.2.1
: Push the fuel line (1)
1110 141 8600 onto the
nipple (2) 0000 855 9200.
VA
143RA172
2 1
: Push the fuel line with nipple onto
the carburetor’s elbow connector.
VA
212RA157
11.2.2 Leakage Test

Stihl MS 390 Specifications

General

Engine Displacement	64.1 cc
Chain Pitch	3/8"
Weight	6.2 kg
Guide Bar Lengths	40 to 50 cm
Fuel Capacity	0.68 l (23.0 oz)