Snapper SV25500HV EU - Manual (Page 11)

11
Section 4 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. Stop
engine. Remove spark plug wire from spark plug
and secure away from plug. Engine and components
are HOT. Avoid serious burns, allow all parts to cool
before working on machine.
4.1 ENGINE ADJUSTMENTS & REPAIR
Refer to the engine owner’s manual for those
adjustments and repairs that can be performed by the
owner.
4.2 IMPELLER
REPLACEMENT
The impeller is a wear item. The actual wear rate is
dependant on the types of debris the machine has
been used to pickup. If the machine develops
unusual noise and/or vibration STOP the engine
immediately. After allowing the engine to cool,
proceed with the following steps.
1. In an open area where fumes can safely
dissipate, drain fuel into an approved container.
2. Drain engine oil.
3. Remove sparkplug wire from sparkplug and
secure away from sparkplug.
4. With engine still attached, remove engine
mounting plate from top of impeller housing.
5. Remove bolt from end of engine crankshaft and
remove impeller. NOTE: a puller may be
required to remove the impeller from the
crankshaft.
6. Inspect the impeller blades, hub keyway, key
and crankshaft for wear or damage. Contact
your authorized dealer if you have any questions
about the impeller or associated parts.
7. Install new impeller onto crankshaft. It is
recommended that you use a new key and new
crankshaft bolt and washer. Torque bolt to 40 ft-
lb.
8. Reinstall engine plate to top of blower housing.
Tighten hardware securely.
9. With sparkplug wire disconnected, pull recoil
rope slowly, checking to make sure engine and
impeller rotates freely.
10. Connect sparkplug wire.
11. Fill engine crankcase to proper level with oil as
specified in the engine owner’s manual
12. Add fuel to tank.
4.3 IMPELLER HOUSING LINER REPLACEMENT
(Commercial Models Only)
The impeller housing liner is a wear item and can
be replaced. To inspect the impeller housing and
liner you must first carefully follow the WARNING
instructions listed on this page. Open up the
discharge door and visually inspect the housing
and liner (if equipped) for damage and wear. The
liner will fit commercial models only and is available
through your local authorized dealer.