Husqvarna 250R Manuel de référence

SERVICE 8

97-05-29

English Page 1/3

Model 250R/RX

Throttle cable routing

This is an instruction covering how to modify the throttle cable routing on machines with a

serial number before 7170157, where the cable enters on the left-hand side of the engine

horizontally under the air filter holder to correspond to the routing that applies after serial

number 7170156.

This involves the throttle cable entering on the right-hand side of the engine diagonally

through the crankcase and upwards to the carburettor. This allows straight routing and is

therefore easier. Two holes must be drilled in the crankcase to accommodate the routing.

See the diagram with dimensions.

In addition, a protective hose needs to be fitted between the holes in the crankcase. A new

throttle cable is also necessary due to its altered length.

The following description gives you a step by step guide on how to do this without dis-

mantling too many components.

1. Remove the cylinder cover.

2. Loosen the starter.

3. Unscrew the short-circuiting cable on the ignition module. Pull the flat pin sleeve off

of the ignition module.

4. Loosen the throttle cable from the throttle lever on the carburettor. Loosen the two

screws on the anti-vib springs by the tank.

5. Remove the fuel pipe from the carburettor.

6. Undo the screws that clamp the holder on the shaft. Pull the holder and tank down

towards the gear on the shaft, about 30 cm. Make sure the fuel pipe, throttle cable

and short circuit cables also follow.

7. Remove the four screws on the clutch cover. The engine can now be removed from

the shaft. Take the rubber grommet used for the short circuit cables out of the

crankcase.

8. Mark out the hole centres as shown in fig. 2 for both holes. Drill the holes using a 9

mm bit.

9. Thread the protective hose on a starter cord. Turn the collared end of the hose

towards the knotted end of the cord. Tie a few more knots so the hose cannot slide

off. Heat the other end of the cord approx. 3-4 cm so it becomes rigid.

For Husqvarna Parts Call 606-678-9623 or 606-561-4983

www.mymowerparts.com

SERVICE 8

97-05-29

10. Thread the starter cord in the hole drilled by the carburettor housing in the crankcase.

11. Coax the cord out through the hole drilled by the clutch cover. You can use a steel

wire with the end bent in a U to catch the cord. The short circuit cable hole just above

can be used to look through.

12. Pull the protective hose right through the crankcase using the starter cord.

13. Remove the grey protective cover from the cable harness on the right-hand side of

the tank.

14. Remove the cover from the rear of the throttle (250 RX). Split the throttle (250R).

15. Loosen the throttle cable from the cable pulley. Dismantle the short circuit cables with

the contact strip (250 RX). Unhook the throttle cable from the throttle trigger (250R).

16. Remove the old throttle cable.

17. Thread the cable through the black protective sheath first. Then thread the new

throttle cable through the plastic hose from the hole by the clutch cover and up to the

carburettor housing. Secure the clutch cover with the shaft on the engine.

18. Fit the rubber grommet on the short circuit cables. Thread the cables through the

hole in the crankcase and out to the ignition module. Connect the cables on the

ignition module and press the rubber grommet in the crankcase. Check that the pole

gap between the flywheel and the module has not changed.

19. Fit the carburettor and filter holder. Hook the throttle cable on the lever and secure

the wire sheath to the air filter holder.

20. Slide back the suspension with the tank towards the engine. Insert the fuel pipe in the

hole in the crankcase. Fit the fuel pipe on the carburettor. Make sure the short circuit

cables are stretched.

21. Secure the anti-vib springs between the tank and engine.

22. Fit the throttle cable and short circuit cables in the throttle. See fig. 1. The U-shaped

nipple on the throttle (250RX) by the wire pulley should be fitted with the opening on

the nipple facing towards the throttle trigger.

23. Fit the cylinder cover and starter.

The new throttle cables and plastic hose have the following part numbers:

502 28 60-04 Throttle cable 250 RX

502 22 89-01 Hose

502 27 93-04 Throttle cable 250R

English Page 2/3

For Husqvarna Parts Call 606-678-9623 or 606-561-4983

www.mymowerparts.com

SERVICE 8

97-05-29

English Page 3/3

Fig. 2

Fig. 1

6,5

34,5

ø9±0,1

35±0,5

ø9±0,1

For Husqvarna Parts Call 606-678-9623 or 606-561-4983

www.mymowerparts.com

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