Husqvarna 250R Service Bulletin

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