Hayter Mowers 493F, 563F Spark Plug Service, Keeping Engine Clean, Grassbag, Deck Housing, Securing Nuts & Bolts

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 g.25)

Replace the spark plug every 100 hours or every season,

whichever occurs rst. 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 g.26)

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 g.27)

Grass and debris may clog the engine’s air cooling

system especially after prolonged operation while cutting

tall, dry grass. The internal cooling ns 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.

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 g.28)

Remove grass debris from the top and underside of the

deck housing immediately after use. (Refer g.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.

Regularly check that all securing nuts and bolts are tight.

Replace missing or damaged items immediately.

Fig. 25 Fig. 26 Fig. 27 Fig. 28 Fig. 29