3. 165 R Technical
data o
Ignitionsystem
Ignitionadvance
Sparkingplug
Sparkingpluggap
Carburetor
Fueltank capacity
Harness
Saw blade
Shaft angle
Weight
Grease
Classificationtable
SEM, type GA2
24° b.t.d.c. at 142 r/s (8500 r/rein)
Bosch WS7F, Champion CJ7Y
0.5 mm
Tillotson diaphragm carburetor type HS 121A
Basic setting:
H = 3/3 turn
L = 1turn
1,0 Iitre petroil admixture
Fuel mixture 40/.(1:25) oil
With Husqvarna Twostroke Oil 2% (1:50)
Husqvarna, type BU 75
Husqvarna, type Maxi 9“
110°
10.8 kg
Empty clearing saw without harness and transit protection
for saw blade
EPOgrease or Husqvarna special grease,
order number 5025127-01
Cylinderclass Pistonclass
A A
B B
c c
If absolutely necessary,
a class A piston may be
used with a class B
cylinder.
Fig. 1:1
NOTE:
A class B piston must not be used with a class A
cylinder nor a class C piston with a class B cylinder.
1:1
——
4. 165R ServiceData u
Leakagetesting
Pressure: 0.08 MPa (0.8 kgf/cmz)
Max. leakage: 0.02 MPa per 30 sec.
(0.2 kgf/cmz per 30 sec.)
Tools: 5025038-01 Pressure tester
5025045-01 Spacer sleeve (35 mm)
5025047-01 Sealing plate, inlet
5025048-01 Sealing plate, exhaust
Fig 2:1
Starter
It should be possible to turn the cord pulley about
another half-turn when the starter cord is fully with-
drawn.
Fig 2:2
Carburetor
Pressure: 0.03 MPa (0.3 kgf/cmz, 4.3 psi)
Leakage: No leakage permitted.
Tools: 5025038-01 Pressure tester
5025045-01 Spacer sleeve (35 mm)
5025047-01 Sealing plate, inlet
5025048-01 Sealing plate, exhaust
Fig 2:3
2:1
5. ServiceData !2
Fuelmixture
The engine is of two-stroke type and receives lubrica-
tion through the addition of oil to the petrol in certain
proportions. For ordinary two-stroke oil a mixture of 1
part Oil to 25 pWLS petrol (4’’/.) k recommended.
For premixed two-stroke oil a mixture of 1 part oil to 20
PWk PdrOi (5Yo)
k recommended.
For Husqvarna Two-stroke Oil a mixture of 1 part oil to
50 parts petrol (2Yo) is recommended.
The table below shows the different mixture proportions.
Mixture table
Litres For 2Y0 For hyo For 5Y0
of petrol mixture mixture mixture
Litres of Litres of Litres of
oil oil oil
5 0.1 0.2 0.25
10 0.2 0.4 0.50
15 0.3 0.6 0.75
20 0.4 0.8 1.00
25 0.5 1.0 1.25
2:2
8. 165R Specialtools B
@ ““ . 5025051-01
/
Crimping pliers
o
,’
5025053-01
Sealing ring assembly
socket
5025063-01
Extractor, angle
gear
502
~50250WJl
5025065-01 (M1O)
Puller, gear shaft
a
5025070-01
n
5025070-01
Piston assembly kit,
complete
1
I
I
.
(
.
5025078-01
Extractor, sealing ring
5025079-01
Sealing ring assembly
sleeve
5025083-01
Hook for tank weight
5025086-01 NV 3 mm
5025087-01 NV4 mm
5025088-01 NV 5 mm
Socket driver with ball
5025090-01
Jet-Pac spray gun, complete
with touch-up paint
5025091-01
Touch-up paint, orange
1/8 Iitre
5025092-01
Propellant gas for Jet-Pac
5025102-01
Assembly jig
5025103-01
Special fixture
3:2
9. 165 R Specialtools B
5025106-01
Glue
5025107-01
Epoxy adhesive
5025108-01
Loctite AA (normal
locking force)
5025109-01
Loctite AAV (high
locking force)
1
5027004-01 (M12)
Screw for puller
3:3
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11. 165R c’
A
Fuelsystem,carburetor
Dismantlingthe carburetor
Clamp the clearing saw in fixture No 5025103-01.
Remove the cylinder casing and blow as much dirt as
possible away from the area round the carburetor,
using compressed air.
Remove the sparking plug cover and air cleaner. Do not
yet remove the plastic sleeve over the carburetor adju-
sting screws as this is held in place by a nail.
Fig 4:2
Close the choke flap to prevent dirt from entering the
cylinder. Disconnect the fuel line and back off the two
nuts (nut driver No 50250 22-01) holding the carburet-
or in place.
Open the choke flap and pull the carburetor straight
out to the rear.
Fig 4.3
Remove the small nail holding the plastic sleeve in posi-
tion over the adjusting screws and remove the sleeve.
Clean the outside of the carburetor.
Fig 4.4
Back off the four screws holding the diaphragm cover in
place and remove the cover. Remove the diaphragm.
Note that the centre stud of the diaphragm enters a
fork-shaped opening in the needle valve lever.
Fig 4.5
Connect pressure tester No. 5025038-01 to the fuel in-
let on the carburetor and pump it up to a pressure of
0.03 MPa (0.3 kgf/cmq).
Check whether any leakage occurs at the needle valve
or at the gasket on the pump side. Leakage points can
most easily be located by dripping petrol onto the places
where leakage is suspected.
Fig 4.6
Back off the screw holding the shaft on which the lever
pivots and remove lever, shaft, spring and needle valve.
4:1
