Husqvarna SM 50 / 2011, Workshop Manual

Page: 79 / 150

F.13
Ed. 01-09-2010
ENGINE
Water pump overhaul
- Remove cover (1), and dispose of O-ring.
- Remove circlip (2) using suitable pliers.
- Slide water pump impeller (3) out of water pump shaft (4).
- Pull out water pump shaft (4) and the two bearings (6 and 7).
- Remove sealing ring (5).
There is a spring (8) that has to be removed before disassembly.
- Fit the new sealing ring (5) with the open side pointing water pump impel-
ler.
- Push the two new bearings (6 and 7) onto water pump shaft (4).
- Slightly grease water pump shaft at the sealing ring, force it fully home with
bearings inside ignition cover (9), and check for smooth motion.
- Fit water pump impeller, and circlip.
- Fit cover (1) with a new O-ring.
- Refit spring (8), secure it with a bit of grease inside hole, if necessary.
Reed unit, intake flange
Reeds loose their tensioning over time, with a consequent power loss.
Damaged or worn reeds shall be replaced.
If reed crankcase sealing surfaces are also damaged, change the
whole reed unit.
Upon reassembly, secure all reed crankcase screws with loctite 243.
Intake flange
Check for cracks or other types of damage.