Hayter Mowers Harrier 48/56 BBC 563F - Manual (Page 11)

11
MOWER MAINTENANCE
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.25)
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.26)
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.27)
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.28)
Deck Housing
Remove grass debris from the top and underside of the
deck housing immediately after use. (Refer fig.29)
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.
Securing Nuts & Bolts
Regularly check that all securing nuts and bolts are tight.
Replace missing or damaged items immediately.
1
Fig. 25 Fig. 26 Fig. 27 Fig. 28 Fig. 29