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Petrol Powered Lawn Mowers 

E&OE 

©2017 Bäumr-AG 

19 

Adjusting Cutting Height 

Most lawn mowers feature adjustable cutting heights. The mechanism 
raises/lowers the lawn mower deck and has several steps. When setting cutting 
height, note that weeds can spread more easily in very short grass. If the grass 
is long it may be necessary to cut it in several passes, each time lowering the 
cutting height. To set the cutting height: 

1.  Pull the height adjustment lever (

A

) outward so that is disengages with the 

teeth (

B

). 

2.  Rotate the lever forward to raise, or backward to lower, then release it at 

the desired height. 

 

 

Using the Grass Catcher 

Note

: Ensure that the mulching attachment (if equipped) is not installed when using the catcher. 

When you want to catch the grass cuttings for disposal, use the grass catcher. The grass catcher hooks to 
the rear of the mower, under the rear guard. To attach and detach it: 

1.  Lift the bottom edge of the rear guard (

A

) sufficiently to allow the catcher to pass underneath it and hold 

it in this position. 

2.  Insert the catcher (

B

), with open end toward the mower, and hook the catcher fingers (

C

) onto the 

mounting points (

D

), then lower the rear guard so it rests on the top of the grass catcher. 

  

 

To remove the grass catcher,  lift the bottom edge of the rear guard, then lift the grass catcher to unhook it 
from the mower. Once unhooked, pull the grass catcher out and lower the rear guard. 

Using the Mulching Attachment 

Some models may feature a "mulching" attachment. Mulching is to re-circulate the cut the grass through the 
blades so that is very finely "chopped" and can be left on the cut grass as a "grass feed". When mulching, 
the grass catcher is not required. To install the mulching attachment: 

1.  Remove the grass catcher, if installed. Lift 

up and hold the rear guard (

A

). 

2.  Insert the mulching attachment (

B

), with 

the top angled forward slightly so that the 
protrusions on the bottom of the 
attachment enter the slots in the mower 
deck. Pull the top of the attachment back 
slightly so it is correctly fitted, then lower 
the rear guard. 

To remove the mulching attachment, lift the rear guard, unhook the mulching attachment from the deck and 
pull it out, then lower the rear guard. 

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

BAUMR-AG   BAUMR-AG   BAUMR-AG   BAU

MR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG   BAUMR-AG  

Summary of Contents for 660EX

Page 1: ...NUAL FOR FUTURE REFERENCE Products covered by this manual may vary in appearance assembly inclusions specifications description and packaging The product is NOT supplied with engine oil although traces of oil from the manufacturing process may be present It is essential to add adequate engine oil of the correct type to the engine before use see Engine Oil Failure to add engine oil will void the pr...

Page 2: ...pment Do not wear loose clothing or jewellery which can be caught in moving parts Keep hair and clothing away from the equipment Stay alert and use common sense when operating the equipment Do not over reach Always maintain secure footing and balance Do not use the equipment if tired or under the influence of drugs alcohol or medication This equipment is not intended for use by persons with reduce...

Page 3: ...necting the electrical cord Do NOT use equipment that has exposed wiring damaged switches covers or guards Do NOT use electrical equipment in wet conditions or in damp locations Do NOT use electrical cords to lift move or carry equipment Do NOT coil or knot electrical cords and ensure electrical cords are not trip hazards General Service Information The equipment must be serviced or repaired at au...

Page 4: ...The product may have blades edges or mechanical devices that can cause severe crush injury to fingers limbs etc Take due care when handling and using the product Single Operator Only The product must be operated by a single person only More than one person operating the product may introduce additional hazards Use Face Protection Wear appropriate full face protection and take due care as the produ...

Page 5: ... product Do NOT use in rain damp or wet conditions Electrical shock can be fatal Electrocution Electrical Shock Hazard Disconnect High voltage or high current electricity may be present or required by the product Always disconnect the product from the electrical supply before handling the product adjusting maintenence etc Power Line Electrocution Hazard High voltage high current power lines may be...

Page 6: ...ays allow all moving components blades etc to stop moving before moving lifting etc Stop the engine if the equipment requires tilting or moving over non grass surfaces Prolonged use may lead to health complications such as carpal tunnel syndrome due to vibration To help reduce the possibility of such conditions wear gloves take breaks frequently keep fingers and hands warm and maintain the equipme...

Page 7: ...Avoid cutting wet or very tall grass If grass is tall mow in several passes each time reducing the cut height Do not use the equipment for purposes it is not designed for such as shredding leaves or wood chipping Avoid overly steep slopes when mowing and when mowing on an incline mow across the face of the incline not up and down it Transportation Safety Always STOP the engine and ensure all cutti...

Page 8: ...ng the Engine 17 Environmental Considerations 17 Altitude 17 Temperature 17 Operation 18 Using the Throttle 18 Engine Safety Bar 18 Adjusting Cutting Height 19 Using the Grass Catcher 19 Using the Mulching Attachment 19 Using the Side Discharge Attachment 20 Using the Self Propel Function 20 Using the Deck Wash Function 20 Mowing Guidelines 21 Maintenance 22 Maintenance Schedule Petrol Engine Mach...

Page 9: ...Petrol Powered Lawn Mowers E OE 2017 Bäumr AG 9 Cleaning Guidelines 28 Transportation and Storage 28 Troubleshooting 29 Specifications 32 Engine Service and Maintenance Record 33 ...

Page 10: ... B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A B A U M R A G B A U M R...

Page 11: ... G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A B A U M R A G B A U M R A G B A U M R A G B A U M...

Page 12: ...R A G B A U M R A G A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A ...

Page 13: ...A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G ...

Page 14: ... blades four blade design If this is the case pull them outward so they are straight use caution as the cutting edge of the blade is sharp B A D E F G H A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B...

Page 15: ... spark plug terminal and push it down so that it connects firmly with the terminal See Spark Plug A A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A ...

Page 16: ...d from a normal standing position behind the mower 5 WARM UP and THROTTLE It is good practice to allow the engine to warm up and run smoothly before using the machine For manual throttles set the desired engine speed once the engine is warm If the engine does not start repeat step 4 If the engine fails to start after several attempts refer to Troubleshooting Typical Manual Throttle Typical Automat...

Page 17: ... U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B...

Page 18: ... released the engine automatically stops This is a safety feature to help ensure that the mower operator is behind the mower while the engine is running To start and run the engine hold the engine safety bar against the handle B Note the safety bar may be o either side of the handle A B A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R B A U M R A ...

Page 19: ...G B A U M R B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A ...

Page 20: ...s procedure may have to be repeated several times A B C D A B A A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A ...

Page 21: ... B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B...

Page 22: ...following items is required Piston for cracks and stress fractures Bore for wear requiring reconditioning Full machine for broken worn or loose parts Failure to follow the maintenance schedule using incorrect or non compatible accessories or replacements parts or general negligence may result in making the product warranty void A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M ...

Page 23: ...M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A ...

Page 24: ...nished re install rotate right the oil filler cap until firm Wipe off any residual oil from the machine A B C D D A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A ...

Page 25: ...A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A ...

Page 26: ... A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R...

Page 27: ... U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M B A U...

Page 28: ...all rotate right the carburettor drain plug and tighten Remove the spark plug and put 10ml of clean engine oil into the cylinder Pull the starter cord slowly to distribute the oil Re install the spark plug Cover the equipment to protect it A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R B A U M R A G B A U M R A G B A U M R A G B A U A U M R A G ...

Page 29: ...clearing excess fuel from engine before attempting to start engine Not enough or too much engine oil Check oil level and ensure that the level is at or just below the recommended maximum level For some engines an engine oil sensor will automatically switch off the engine or prevent starting if a low engine oil level is detected A U M R A G R A G B A U M R A G A G B A U M R A G B A U M R G B A U M ...

Page 30: ... G B A U M R A G B A U M R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G...

Page 31: ... R A G B A U A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R...

Page 32: ... A G B A U M R A G B A U M R A G B A U M R A G R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U...

Page 33: ... R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B G B A U M R A G B A U M R A G B A U M R A G B A U M R A G B A U M R A G...

Page 34: ...pecific application or your description of the application Be sure to attain third party approval for your application from a qualified specialist before use regardless of prior assurances by the retailer or its representatives This product is not intended for use where fail safe operation is required As with any product take an automobile aircraft computer or ball point pen for example there is a...

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