Hayter Mowers Harrier 48 491G - Manual (Page 11)

11
MOWER MAINTENANCE
Carburettor Adjustments
Should only be made by an authorised Briggs & Stratton
dealer. Under no circumstances should the engine be
adjusted to run at a speed in excess of that shown on the
Declaration of Conformity.
Oil Service
Check the oil level daily before starting the engine and
ensure that the correct oil level is maintained. Refer to-
‘Before Starting the Mower’ for oil checking and filling
instructions.
Change the engine oil after the first 5 hours of operation
and thereafter according to the ‘Maintenance Schedule’:-
1. Drain fuel by running the engine until the fuel tank is
empty.
2. Remove the spark plug lead.
3. Allow the engine to cool.
4. Drain the oil while the engine is warm (not hot)
5. Tip the mower over on to its left hand side thus
ensuring that the air cleaner is kept uppermost to
prevent engine damage.
6. Remove the oil filler dipstick and drain the oil into a
suitable container.
7. Refill with new oil of the recommended SAE
viscosity grade. (Refer to-‘Before Starting the
Mower’) (Refer fig.21)
Air Cleaner Service
To service the air cleaner, loosen screw (1) and remove
cover (2). (Refer fig.22)
Remove cartridge (3) and clean by tapping gently on a
flat surface. If very dirty, replace.
- Do not use petroleum solvents.
- Do not use pressurised air.
- Do not oil the cartridge.
After servicing, install the cartridge into the cover. Insert
the tabs on the bottom of the cover into the slots in the
bottom of the base (4). Tilt the cover upwards and se-
curely tighten the screw to the base.
Spark Plug Service
Use only Briggs & Stratton (Part number 19368) spark
tester (1) to check for a spark as shown in the diagram.
(Refer fig.23)
Replace the spark plug every 100 hours or every season,
whichever occurs first. A spark plug wrench is available
from any authorised Briggs & Stratton service dealer.
Check the spark plug gap with a feeler gauge and set at
0.50mm. (Refer fig.24)
Keeping Engine Clean
Remove all grass and debris from the engine including
the exhaust/exhaust guard, the air ways in the top cowl
and the surrounding deck areas on a daily basis after
use. Never spray the engine with water during cleaning.
Water can contaminate the fuel. Always clean with a
brush or compressed air. (Refer fig.25)
Grass and debris may clog the engine’s air cooling
system especially after prolonged operation while cutting
tall, dry grass. The internal cooling fins and surfaces
may require cleaning to prevent overheating and engine
damage. We recommended that this service be carried
out by an authorised Hayter Service dealer.
Grassbag
Remove grass debris from the grassbag immediately
after use and check its condition for signs of damage.
To prevent accidents replace a damaged grassbag
immediately. (Refer fig.26)
Deck Housing
Remove grass debris from the top and underside of the
deck housing immediately after use. (Refer fig.27)
Fertilisers and top dressings are particularly corrosive.
Thoroughly clean the mower deck immediately after
use on treated grass and store well away from corrosive
materials.
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Fig. 21 Fig. 22 Fig. 23 Fig. 24 Fig. 25 Fig. 26 Fig. 27