Scott Bonnar Model 46 Scarifier/Groover — Owners Manual

The owners manual for the Scott Bonnar Model 46 Scarifier/Groover — safety, fuelling, starting, depth of cut, drive belt and reel and blade replacement, a full trouble shooting guide, and the complete three-drawing spare parts list. Note this machine takes one of three reels (two grooving, one scarifying) and the blade you order must match the reel you have.

• ModelsModel 46 Scarifier/Groover
• Pages12
• PublicationS1943772 Rev. A · 2-99 · drawings SPV-54

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Full text of this manual

A full transcription of the Scott Bonnar Model 46 Scarifier/Groover owners manual (Rover Mowers Limited, publication S1943772 Rev. A, February 1999), including the complete three-part spare parts list.

The manual spells the machine Scarifier/Groover throughout — it cuts grooves in turf. Some copies of the file circulate under the name “Scarifier-Groomer”; the printed pages say Groover.

Warning (front cover)

• A mower is a high speed cutting tool. Safety precautions must be observed to reduce the risk of accident.
• Careless or improper use may cause serious injury.
• Be sure that you read and fully understand the contents of this Owners Manual. Should any point be unclear contact Rover Mowers Limited in your State or an authorised Rover Mowers Limited Service Agent for assistance.
• Keep the Owners Manual in a safe place for future reference. Read the Owners Manual periodically to ensure the continued safe and proper use of the mower.

Safety instructions

• A mower user must be in good physical condition and mental health and not under the influence of any drug or alcohol which might impair vision, co-ordination or judgement.
• Do not use a mower when tired or fatigued. Lack of alertness may cause serious injury.
• Know your controls. Read and understand Owner’s Manual before operating mower. Learn how to stop the mower in an emergency. Refer Operator’s Instructions.
• Do not lend or sell the mower without the Owner’s Manual.
• Be sure that anyone using the mower reads and fully understands how to safely operate the mower.
• Never mow whilst bystanders or pets are present in the mowing area.
• Never mow while barefoot or wearing open sandals or thongs. Wear long trousers and heavy non-slip shoes.
• It is advisable to wear suitable eye protection when operating a mower.
• Before using, always visually inspect to see that the blades, blade bolts and cutter assembly are not worn or damaged. Replace worn or damaged blades and bolts in sets to preserve balance.
• Damaged blades and worn bolts are major hazards.
• Replace worn or faulty silencers.
• Make sure the area to be mowed is cleared of sticks, stones, bones, wire and debris. They could be thrown by the blades.
• Store fuel in a cool place in a container specifically designed for the purpose. In general, plastic containers are unsuitable. Handle fuel carefully. It is highly flammable.
• Refuel outdoors only. Do not smoke when refuelling engine. Add fuel before starting engine. Never remove the cap from the fuel tank or add petrol while engine is running. Allow engine to cool for several minutes before refuelling if engine is hot. If petrol is spilled, do not attempt to start the engine, but move the mower away from the area of the spill and avoid creating any source of ignition until the petrol vapours have dissipated.
• Remove the fuel cap slowly to relieve fuel tank pressure.
• Check for fuel leaks while refuelling or using the mower. If fuel leak is found, do not start or run the engine until the leak is fixed and spilled fuel is wiped away.
• Take care not to get fuel on your clothing. If this occurs, change your clothing immediately.
• Do not operate mower in confined space where exhaust fumes (carbon monoxide) can collect.
• Mow only in good daylight.
• Start the engine carefully with feet well away from the blades.
• Disengage all blade and drive clutches before starting.
• When starting, do not wrap the starter rope around your hand. Do not allow the starter cord to snap back. Return the starter grip slowly to allow the cord to rewind properly.
• Strictly follow the operator instructions before attempting to start engine.
• Never leave wind-up starters in a wound position.
• Never mow where machine could tip or slip.
• On slopes or wet grass be extra careful of your footing.
• Never cut grass by pulling mower towards you.
• Be extremely careful when using a mower on slopes. Stay alert for holes in the terrain and other hidden hazards.
• Stop the engine before pushing the mower across gravel drives, walks or roads.
• Never over-speed the engine or alter the governor settings. Excessive speed is dangerous and shortens mower life.
• Stop the engine whenever you leave the mower even for a moment.
• Stop the engine and disconnect the spark plug wire and inspect mower if: (a) the mower begins to vibrate abnormally; or (b) after striking a foreign object. Repair any damage before continuing further operation of the mower.
• Stop the engine and disconnect the spark plug wire before clearing blockages, checking or working on the mower.
• Never pick-up or carry a mower when it is operating.
• Where fitted, turn fuel tap off at the conclusion of mowing.
• When transporting in a vehicle, secure the mower to prevent movement, roll-over, fuel spillage, and mower damage.
• Keep all nuts, bolts and screws tight to be sure the equipment is in a safe working condition.
• Never modify the mower in any way. Use only replacement parts made and guaranteed by the original manufacturer of your mower.
• Keep all safety devices (guards and switches) in place and working.
• Keep the engine free of grass, leaves or excessive grease — these can be a fire hazard.
• Store the mower in a well ventilated room away from naked flames such as may be found in hot water heaters.
• Walk, Never Run.

To emphasise special information the words WARNING and CAUTION are used.

• WARNING: The safety of the user and others is involves [sic]. Personal injury may result should this information be disregarded.
• CAUTION: Follow these instructions carefully to avoid mower damage and loss of warranty.

Before starting

Prepare engine

The four stroke engine used on the mower requires separate additions of petrol and oil.

CAUTION: Do not mix petrol with oil.

Petrol. Clean, fresh, unleaded petrol is recommended. Lead free petrol burns cleaner with fewer combustion deposits.

Oil. Use a high quality detergent oil with service classification SE OR SF. Detergent oils keep the engine clean and retard the formation of gum and varnish deposits.

CAUTION: Use no oil additives.

Fill sump with oil — capacity 600ml

1. Place mower on level ground.
2. Clean area around OIL-FILL.
3. Remove Oil Fill Plug and check oil level.
4. Fill sump to Point of Overflowing.
5. Replace Oil Fill Plug securely.

Fill fuel tank

WARNING: Refuel outdoor only. Do not smoke while fuelling engine. Add fuel before starting the engine. Never remove the cap from the fuel tank or add petrol while the engine is running or when the engine is hot. If petrol is spilled do not attempt to start the engine but move machine away from the area of the spill and avoid creating any source of ignition until petrol vapours have dissipated.

1. Clean area around fuel cap and remove cap from tank.
2. Fill tank to just below filler neck.
3. Replace petrol tank cap securely.

To start mower

WARNING: Before starting, learn how to stop the engine quickly in any emergency.

1. Turn fuel tap ON. (where fitted)
2. Move throttle control to CHOKE.
3. Grasp starter handle and pull.
4. After engine starts move throttle control to RUN.

To stop mower

1. Move throttle control to STOP
2. Turn fuel tap OFF. (where fitted)

Hints for easy starting

1. Start a warm engine with the throttle control set at RUN.
2. Start the mower on a level, gravel free path or driveway. As the blades are unloaded, less effort is requires [sic]. When starting on grass move the mower to an area previously cut.
3. Keep the underside of the mower base clean. Remove any obstruction to the free movement of the cutting assembly.

Maintenance

Perform only that maintenance described in this manual and the engine instructions. For other adjustments or repairs contact an Authorised Rover Mower Service Agent.

Maintain engine oil level

CAUTION: A low oil level may result in engine damage.

Check oil level each 5 hours of use.

Change oil

REFER ENGINE INSTRUCTIONS. Change oil after first 5 hours of mowing. Thereafter change oil every 25 hours of mowing. Dispose of waste oil thoughtfully.

WARNING: Tilt mower with fuel tank empty. Fuel may spill from the fuel cap vent.

Mower cleaning

REFER ENGINE INSTRUCTIONS.

WARNING: To reduce fire hazard, keep the mower clean.

For best mower performance keep the engine underside of mower base clean.

WARNING: Maintain engine air cooling system. Poor air flow may result in over speeding, overheating and engine damage.

CAUTION: Do not hose the engine. A forced spray of water may contaminate the fuel system. Poor engine performance may result.

Engine air cleaner

REFER ENGINE INSTRUCTIONS.

The engine air cleaner element must be serviced after each 25 hours of normal mowing. The element must be serviced more frequently when the mower is used in dusty conditions.

Spark-plug

For best engine performance check the condition of the spark-plug each 100 hours of mowing. A worn or damaged spark plug must be replaced.

CAUTION: Do not sand blast or file spark plug electrodes. Grit may release from the plug and fall into the cylinder. Engine damage may result.

1. Clean area around spark-plug to ensure no dirt enters cylinder when plug is removed.
2. Using tube spanner provided remove plug.
3. If a new plug is required use Champion type RJ19LM or equivalent.
4. Set gap between electrodes from 0.7 to 0.8.
5. Install plug in engine and tighten to 20 Nm. If a torque wrench is not available hand tighten plug. Then with tube spanner tighten plug about 1/2 of 1 turn.

CAUTION: Do not overtighten spark-plug. Engine damage may result.

Operating instructions

1. Move the clutch lever to disengaged position. (pointing up).
2. Move throttle lever to start position and start engine.
3. Raise front wheels off the ground by pushing down on handles and engage cutter clutch.
4. Slowly lower front wheels to turf.

Figs. 1 and 2 in the scans show the clutch lever in its DISENGAGE and ENGAGE positions; Fig. 3 shows locknut “A” and adjusting nut “B” on the drive belt.

Height of cut

1. Adjust rear wheels to approximate depth of cut by loosening wingnuts and moving lever to required position. Fig. 2.
2. Adjust front wheels in the same manner to fine adjust the depth of cut.
3. Engage clutch lever.

Drive belt adjustment

1. Loosen off locknut “A” fig. 3
2. Adjust nut “B” to tighten belt. fig. 3.
3. Retighten locknut “A”

Reel replacement

1. Remove spark plug lead from spark plug.
2. Remove the belt guard from machine.
3. Remove the twin drive belts from around pulleys.
4. Loosen off flangette bearing locking collars then remove reel securing bolts.
5. Replace in opposite order.

Note: Secure reel in body before locking up bearing collars.

Blade replacement

1. Remove reel as above from body.
2. Remove flangette bearing from shaft.
3. Remove locknut from shaft and slide blades and spacers from shaft.
4. Replace blades in sets with spacers and secure with nut.
5. Refit reel to body.

Trouble shooting guide

Spare parts list

The parts list runs across three drawings, all on sheet SPV-54: Drg 1 of 3 (body, wheels and rear cover), Drg 2 of 3 (cutter shaft, reels and drive) and Drg 3 of 3 (handle bar and controls). Item numbers restart at 1 on each drawing, so an item number on its own is ambiguous — always quote the drawing as well.

An asterisk (*) in the part number column means the original prints “Commom Hardware item” — a standard nut, bolt or washer with no dedicated part number.

Drg 1 of 3 — body, wheels and rear cover

Someone has written on this page of the scanned copy: a bracket joining items 43, 44 and 45 with the note “461480 — complete rear cover flap”. That is a handwritten annotation, not factory text, but it is consistent with item 3 above — 461480 is the rear cover assembly, i.e. the cover, flap strip and reinforcement supplied together.

Drg 2 of 3 — cutter shaft, reels and drive

Item 13 and item 18 each appear three times — that is how the original prints them. The machine takes one of three reels, and the blade at item 18 must match the reel you have: 460306 (19 tipped blades at 1") takes 462061, 460197 (19 straight blades at 1") takes 461640, and the scarifying reel 460103 (10 offset blades at 2") takes 461130.

Drg 3 of 3 — handle bar and controls

The drawings carry the warning “NEVER OPERATE THIS MACHINE UNLESS ALL GUARDS ARE IN PLACE”.

Warranty conditions — Australia & New Zealand only (as printed)

Rover Mowers Limited warrant that this machine is free from defects in material and workmanship. This warranty is limited to making good or replacing any part which appears upon inspection by the manufacturer or his agent to be defective in material or workmanship.

The petrol engine used to power this machine is warranted by the manufacturer whose warranty statement has been included with the machine. As the warranty for the engine may differ from the warranty for the other components, you are advised to read the engine manufacturer’s warranty carefully.

For other items this warranty shall apply for a period of 12 months from date of purchase except for products used commercially where the warranty is limited to 90 days.

This warranty does not obligate the manufacturer, his agents or dealers to bear the transport costs incurred in the repair or replacement of any defective part.

This warranty excludes fair wear and tear, or any damage caused by misuse or abuse. Parts such as blades, blade bolts, v-belts and spark plugs, which can be subjected to use beyond their normal intended working capacity are also excluded.

This warranty is void if parts other than genuine have been used or if repairs or alterations have been made without the manufacturer’s written authority.

The above warranty does not exclude any condition or warranty implied by the Trade Practices Act 1974 or any other relevant legislation which implies any condition which cannot be excluded.

REMEMBER: PROOF OF PURCHASE IS THE RESPONSIBILITY OF THE OWNER AND IS NECESSARY PRIOR TO WARRANTY WORK BEING UNDERTAKEN. REPAIRS MUST BE CARRIED OUT BY AN AUTHORISED DEALER AND GENUINE SPARE PARTS MUST BE USED OR YOUR WARRANTY WILL BE VOID.

Rover Mowers Limited reserves the right to make changes of and add improvements upon its product at any time without notice or obligation. The Company also reserves the right to discontinue manufacture of any product at its discretion at any time.

This warranty is reproduced for historical completeness only. It expired with the original purchaser and confers no rights today.

Rover Mowers Limited (as printed)

• Rover Mowers Australia: P.O. Box 1235, Eagle Farm, Qld 4009, Australia.
• Rover Mowers New Zealand: East Tamaki, Auckland, New Zealand.

A.C.N. 000257303. Quality Endorsed Company, ISO 9001 Lic 10168, Standards Australia. Printed in Australia on 100% Australian recycled paper.

Transcribed from the Rover Mowers Limited owners manual S1943772 Rev. A (© 2-99); spare parts drawings SPV-54. The scanned pages in the viewer above are the authoritative source.