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12. If the blades do come into contact with something or the 

mower starts to vibrate stop the engine immediately, 

remove the spark plug lead and inspect to see if there  

is any damage. 

Emptying the grass catcher

Note.

 Before making any adjustment or maintenance 

procedures to the mower ensure it is turned off and the 

spark plug lead is removed.
To remove the catcher, raise the guard while lifting the 

catcher to dislodge it from the hooks.

WARNING.

 Check the catcher frequently for cracks and 

wear and replace it if damaged.
Do not leave clippings in the catcher for extended periods. 

Replacing the blades 

Note. 

Before making any adjustment or maintenance 

procedures to the mower ensure it is turned off and the 

spark plug lead is removed. 

Note. 

Wear heavy gloves to protect your hands. 

1. Tilt the mower back so the spark plug is facing up. 
2. Remove the blade disc with a spanner to remove the 

central blade bolt first. 

3. Remove all 4 single blades including the washer  

and nuts.

4. Clean dirt and grass from around the blade mounting area. 

5. Replace all 4 blades to 

ensure a smooth even cut. 

By replacing the washer, then 

the half washer, then the nut 

securing the blade firmly,  

(25 – 30Nm) repeat this for  

the other 3 blades. 

6. Replace the blade disc and 

retighten the central blade bolt 

tightly (50 – 59Nm). 

Note. 

Use a wooden block to stop the blade from turning. 

The 4 blades should be tightened fully but check to ensure 

they can still swing back if they were to hit a solid object.
Where required tighten the bolts with a torque wrench, 

the centre disc blade bolt torque: 50 – 59Nm and the four 

blades torque: 25 – 30Nm.
If you do not have a torque wrench ask a mower service 

dealer to tighten the blade bolts before you use the mower.

WARNING.

 If the blade bolts are not tightened correctly 

they could loosen and/or come out and it would be possible 

for the blades to fly off while you are operating the mower.

Maintenance 

For all maintenance information refer to the Briggs & 

Stratton instruction manual.

Summary of Contents for RL504

Page 1: ...1 4HP PETROL LAWN MOWER RL504 INSTRUCTION MANUAL Black Cyan Magenta Yellow Code RL504 IM Date 070421 Edition 13 Op GM ...

Page 2: ...so does not cover any bonus items or included accessories Only the power tool is covered under this warranty With continuing product development changes may have occurred which render the product received slightly different to that shown in this instruction manual Please ensure that you store your receipt in a safe place Conditions apply to the above warranty For full details of the warranty terms...

Page 3: ...isk of hand and feet injuries Introduction Your new GMC power tool will more than satisfy your expectations It has been manufactured under stringent GMC Quality Standards to meet superior performance criteria You will find your new tool easy and safe to operate and with proper care it will give you many years of dependable service CAUTION Carefully read through this entire Instruction Manual befor...

Page 4: ...where the equipment is to be used and remove all objects which may be thrown by the machine or damage the cutter assembly and the engine stones sticks metal wire bones etc WARNING DANGER Engine fuel is highly flammable Store fuel in containers specifically designed for this purpose Refuel using a funnel and outdoors only Do not smoke while refuelling or whenever handling the fuel Add fuel before s...

Page 5: ... Inspect the lawn mower for damage and make repairs before restarting and operating the lawn mower If the lawn mower starts to vibrate abnormally find and remove the cause of the vibration immediately Stop the engine Whenever you leave the lawn mower unattended Remove the key from models with electric starters Before refuelling Every time you remove or replace the grass catcher Reduce the throttle...

Page 6: ...king gloves grasp the machine at the points that offer a safe grip taking account of the weight and its distribution Damaged blades and worn bolts are major hazards Unpacking Due to modern mass production techniques it is unlikely that your GMC Power Tool is faulty or that a part is missing If you find anything wrong do not operate the tool until the parts have been replaced or the fault has been ...

Page 7: ... 3 Throttle Lever 4 Discharge guard 5 Grass catcher 6 Height adjustment lever 7 Fuel tank cap 8 Oil filler cap 9 Recoil starter 10 Spark plug cap 11 Air filter 12 Primer bulb 13 Handle bar locking knob 14 Brake Lever 5 3 4 11 10 1 2 6 8 7 13 14 9 12 ...

Page 8: ... catcher before it has reached maximum capacity otherwise it will decrease the performance of the mower Attaching the Handles It is necessary to attach both the lower handle and handle bars 1 To attach the lower handle first use a spanner to remove the 4 bolts 2 Place the lower handle in position and replace the 4 bolts Use the spanner to retighten the nuts 3 To attach the handle bar first remove ...

Page 9: ...further information refer to the Fuel Recommendations section in the Briggs Stratton instruction manual Checking the oil CAUTION The lawn mower is shipped without oil Do not start your lawn mower before ensuring it has been filled with the right amount of correct grade oil Refer to the oil recommendations section of the Briggs Stratton instruction manual for this information 1 Move the lawn mower ...

Page 10: ...ing uneven or rough ground Keep a firm grip on the handle bar at all times always walk never run with the mower 4 For healthy growth grass should not be cut too short This can cause damage to the grass and allow weeds to develop 5 Vary your cutting pattern from week to week this will help to prevent matting and graining of the grass 6 Before checking a clogged mower deck stop the engine completely...

Page 11: ...central blade bolt first 3 Remove all 4 single blades including the washer and nuts 4 Clean dirt and grass from around the blade mounting area 5 Replace all 4 blades to ensure a smooth even cut By replacing the washer then the half washer then the nut securing the blade firmly 25 30Nm repeat this for the other 3 blades 6 Replace the blade disc and retighten the central blade bolt tightly 50 59Nm N...

Page 12: ...ew Zealand 7am 7pm 7days a week AEST Please note that if repair or replacement is required you must provide a valid original purchase receipt You will need the following details at hand to log your service request Personal details First Last name address pick up address contact phone numbers email address Product details Product number date of purchase retailer bought from State postcode receipt n...

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