Rockwell Shop Series RS8080, User Manual

139CC 40CM PETROL LAWN MOWER   

 EN

12

edges could cause injury USE GLOVES

Renew your metal blades and bolts after 

50Hrs mowing or 2yrs which ever is sooner 

regardless of condition.

If the blade is cracked or damaged replace it 

with a new one.

MAINTENANCE

1. CLEANING

WARNING! Make sure before carrying 

out any cleaning or maintenance that 

the spark plug cap is disconnected from 

the spark plug and is moved away from the 

spark plug!

To ensure the best performance of your lawn 

mower, it is important to keep it clean. Always 

clean your lawnmower immediately after use. 

Do not allow grass cuttings and other debris 

to become dry and hard on any of the mower 

surface. This will directly affect the cutting and 

grass collection performance. Make sure that the 

underside of the lawnmower deck is clean and 

clear.

Ensure the discharge chute and safety flap 

are clean. The grass catcher must always be 

emptied each use. Make sure that the exterior of 

the engine is clear of all debris, cuttings and dirt.

Maintenance schedule

First 5 hours 

of use

12 Hours 

of use

25 hours 

of use

50 hours 

of use

Air filter

――

Check Replace Replace

Spark 

plug

Check

Check

Clean Replace

Engine 

oil

Replace

Check

Check Replace

2. SPARK PLUG (See Fig. K)

1)  Once the engine has cooled, remove 

the spark plug using the socket spanner 

supplied. 

2)  Clean the plug with a wire brush. 

3)  Using a feeler gauge, set the gap to 0.75mm.

4)  Install the spark plug carefully by hand, to 

avoid cross-threading.

5)  After the spark plug is seated, tighten with 

spanner to compress the washer.

3. AIR FILTER (See Fig. L1-L2)

Unclip the air filter cover and remove the sponge 

filter element. To avoid objects falling into the air 

tank, replace the air filter cover. Wash the filter 

element in warm soap water, rinse and allow to 

dry naturally. Saturate the air filter element with 

fresh engine oil approx 60ml. Wrap the filter in a 

clean cloth and squeeze out excess oil for avoid 

possible mower starting failure. (Do not wring 

out or twist the filter as this will cause damage to 

the foam) place air filter into the base.

WARNING! Never run the engine without 

the air filter element installed.The 

“foam only” style air filter system works 

by trapping dirt and debris though the use 

of motor oil spread throughout the oil foam 

holding medium. A dry or non-oiled oil foam 

filter will trap only the largest particles. If 

the air filter element is foam only, it MUST be 

oiled and serviced regularly. Your foam filter 

requires replacement every 3 months or after 

25 hours of use, whichever occurs first, more 

often under dusty conditions.

4. CHANGING THE OIL (See Fig. M)

The oil drain plug (22) is located under the oil 

filler.

Tilt the lawnmower towards the oil filler, have 

a container ready to catch the oil and remove 

the drain plug. Once the oil has been emptied, 

replace the dipstick and wipe clean any 

spillages.

Refill of SAE30 oil. When the dipstick is rested 

on the filler pipe, the oil level must be between 

the min and max marks on the dipstick. See 

‘’Filling with Engine Oil’’. Do not overfill. 

Start the engine and allow it run briefly. Stop the 

engine, wait one minute and check the oil level. 

Top up if necessary.

5. STORAGE

CAUTION! Fuel left in the fuel tank over the 

winter period will become state and the 

engine will not start.

For long term storage at the end of the season, 

the oil tank should be drained. On the last mow 

of the season let the mower run until it stops