Bohmer-AG AG-178FD User manual

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© Böhler-AG 2017
AG-178FD / AG-192FD
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© Böhler-AG 2017
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 the Checking and Changing Engine
Oil section. Failure to add engine oil will void the product warranty.
READ THIS MANUAL CAREFULLY BEFORE USE – FAILURE TO DO SO MAY RESULT IN INJURY,
PROPERTY DAMAGE AND MAY VOID WARRANTY. • KEEP THIS MANUAL FOR FUTURE REFERENCE.
• Products covered by this manual may vary in appearance, assembly, inclusions, specifications,
description and packaging.
Version 1.1
Qualität Durch Forschung

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© Böhler-AG 2017
AG-178FD / AG-192FD
Safety
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© Böhler-AG 2017
AG-178FD / AG-192FD
Use the equipment and accessories etc. in
accordance with these instructions, taking into
account working conditions and the work to be
performed. Using the equipment for operations
different from those intended could result in
hazardous situations.
Before use, inspect the equipment for mis-
alignment or binding of moving parts, loose
components, damage or any other condition
that may affect its operation. If damaged, have
the equipment repaired by an authorized service
centre or technician before use.
Always keep the equipment and accessories
(cutting tools, nozzles, bits etc) properly
maintained. Keep the equipment, controls and
handles dry and free from dirt, oil and grease.
Store the equipment out of reach of children
or untrained persons. To avoid burns or fire
hazards, let the equipment cool completely
before transporting or storing. Never place the
equipment in places where there are flammable
materials, combustible gases or combustible
liquids etc.
The equipment is not weatherproof, and should
not be stored in direct sunlight, at high ambient
temperatures or locations that are damp or very
humid.
General Work Safety
Work areas should be clean and well it.
Do not operate the equipment if bystanders,
animals etc are within operating range of the
equipment or the general work area.
Personal Safety
Keep packaging away from children - risk of
suffocation! Operators must use the equipment
correctly. When using the equipment, consider
conditions and pay due care to persons and
property.
Prevent unintentional starting of the equipment
- ensure equipment and power source switches
are in the OFF position before connecting or
moving the equipment. Do not carry equipment
with hands/fingers touching any controls.
Remove any tools or other items that are not a
part of the equipment from it before starting or
switching on.
Stay alert and use common sense when operat-
ing equipment. Do not overreach. Keep proper
footing and balance at all times. Do not use
equipment when tired or under the influence of
drugs, alcohol or medication. This equipment is
not intended for use by persons with reduced
physical, sensory or mental capabilities.
You must wear appropriate protective equip-
ment when operating, servicing, or when in
the operating area of the equipment to help
protect from serious injury, including eye injury,
inhalation of toxic fumes, burns, and hearing
loss. Always wear eye protection. Protective
equipment such as respirators, non-skid safety
shoes, hard hat, hearing protection etc should
be used for appropriate conditions. Other
people nearby should also wear appropriate
personal protective equipment. Do not wear
loose clothing or jewellery, which can be caught
in moving parts. Keep hair and clothing away
from the equipment.
If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of
dust collection can reduce dust-related hazards.
General
Do not force the equipment. Use the correct
equipment for your application. The correct
equipment will perform better and be safer
within its design parameters. Do not use the
equipment if the ON/OFF switch malfunctions
– any equipment that cannot be controlled with
the ON/OFF switch is dangerous and must be
repaired.
It is important that you read and understand
the instruction manual before use and keep
the manual in a safe place for future reference.
Safety information presented here is generic in
nature – some advice may not be applicable to
every piece of equipment.
All safety precautions must be observed to re-
duce the risk of personal injury when operating
the equipment.
The term “equipment” refers to your product,
be it electrical mains, battery or petrol engine
powered.
IMPORTANT – Handle the equipment safely and
carefully.
BEFORE USE - If you are not familiar with the
safe operation/handling of this equipment,
or are in any way unsure of any aspect of
suitability or correct use it for your application,
you should complete training conducted by
a person or organization qualified in safe use
and operation of this equipment, including fuel/
electrical handling and safety.
WARNINGS
• Read all safety warnings and all instructions.
Failure to follow warnings and instructions
may result in electric shock, fire and/or serious
injury.
• Never run a petrol engine in confined areas.
• Do not operate the equipment in flammable
or explosive environments, such as in the
presence of flammable liquids, gases or dust.
Engine and equipment may create sparks or
heat that may ignite vapors, dust etc
• Keep clear of moving parts.
• This equipment may be a potential
source of electric shock if misused.
• Do not operate the equipment if it is damaged,
malfunctioning or is in an excessively worn
state.
• Do not allow others to use the equipment
unless they have read this manual and are
adequately trained.
• When using the equipment, basic safety
precautions detailed here must always be fol-
lowed to reduce the risk of fire, electric shock,
personal injury and material damage.
• When wiring electrically powered equipment,
follow all electrical and safety codes.
• Ensure all power sources conform to equip-
ment voltage requirements and are disconnect-
ed before connecting equipment.
You Can be
INJURED if you do not
follow instructions or
equipment damage may
occur.
You CAN be KILLED or
SERIOUSLY INJURED if
you do not follow
instructions.
You WILL be KILLED or
SERIOUSLY INJURED
if you do not follow
instructions.

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© Böhler-AG 2017
AG-178FD / AG-192FD
General Fuel Safety
Petrol/fuel/gasoline is extremely
flammable - keep clear of naked
flames or other ignition sources.
• Do not spill fuel. If you spill fuel, wipe it
from your equipment immediately. If fuel gets
on your clothing, change them immediately.
• Do not smoke near fuel.
• Always shut off engine before refuelling.
• Do not refuel a hot engine
• Open the fuel cap carefully to allow any
pressure build-up in the tank to release slowly.
• Always refuel in well ventilated areas.
• Always check for fuel leakage. If fuel leak-
age is found, do not start or run the engine
until all leaks are fixed.
General Service Information
• Have the equipment serviced or repaired
at authorized service centers by qualified
personnel only.
• Replacement parts must be original equip-
ment manufacturer (OEM) to help ensure that
equipment safety is maintained.
• Do not attempt any maintenance or repair
work not described in this instruction manual.
• After use, the equipment and components
may still be hot – allow the equipment to cool
and disconnect spark plugs and/or electrical
power sources and/or batteries from it before
making adjustments, changing accessories or
performing repair or maintenance.
• Do not make adjustments while the equip-
ment is running.
• Perform all service related activities under
suitable conditions, such as a workshop etc.
• Replace any worn, damaged or missing
warning labels immediately.
• Do not clean equipment with solvents,
flammable liquids or harsh abrasives.
DANGER
Running combustion engines in confined areas
CAN KILL IN MINUTES. Engine exhaust fumes
contain carbon-monoxide – a deadly gas that
you cannot smell or see.
NEVER run a combustion engine in confined
areas EVEN IF windows and doors are open.
ONLY run petrol engines OUTDOORS and away
from doors, windows and vents.
Do not operate the equipment in hazardous
locations, such as where there may be a risk
of fire or explosions from flammable liquids,
gases or dust.
Do not operate the equipment in confined
areas where exhaust gases, smoke or fumes
could reach dangerous concentrations.
Do not refuel a combustion engine while it is
running, on or hot.
Never smoke while refuelling combustion
engines or handling flammable substances.
For generators, the electrical output is poten-
tially lethal and must only be connected to a
fixed electrical installation by an appropriately
licensed person.
Be aware that the equipment may include
hazardous components, such as blades, hot
surfaces and moving parts.
Handle any flammable substance with extreme
caution.

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© Böhler-AG 2017
AG-178FD / AG-192FD
Table of Contents
•
Safety............................................................................................................................................2
Table of Contents ..........................................................................................................................4
Applicable Models.........................................................................................................................5
Parts Identification........................................................................................................................6
Assembly ......................................................................................................................................7
Before Use Checklist .....................................................................................................................8
Before Use Checklist Continued ....................................................................................................9
Mounting & Connecting to the Engine ........................................................................................10
Engine Starting and Operation ....................................................................................................11
Engine Starting and Operation Continued ...................................................................................12
Maintenance................................................................................................................................13
Checking and Changing Engine Oil..............................................................................................14
Checking and Changing Engine Oil Continued.............................................................................15
Checking, Cleaning or Replacing the Air Filter.............................................................................16
Transportation and Storage.........................................................................................................17
Troubleshooting ..........................................................................................................................18
Troubleshooting Continued .........................................................................................................19
Specifications..............................................................................................................................20
Service and Maintenance Record................................................................................................21

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© Böhler-AG 2017
AG-178FD / AG-192FD
Applicable Models
This Manual applies to the following diesel engines:
AG-178-FD
AG-192-FD

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© Böhler-AG 2017
AG-178FD / AG-192FD
Parts Identification
It is stongly recommended that you familiarise yourself with all major components of the machine
before using it or performing any maintenance tasks.
Products detailed in this manual may vary in appearance, inclusions, description and
packaging from those shown or described. This section shows typical major compo-
nents common to most engines.
No. Name
1 Exhaust
2 Fuel Tank (fuel filter on top)
3 Air Intake assembley (Filter inside)
4 Throttle
5 Fuel Tap
6 Oil Filter/Dipstick (Some models have 2)
7 Oil Drain Plug (Some models have 2)
8 Fuel ON/OFF Switch
No. Name
9 Recoil Starter Cord
10 Electric Start Module (Electric Start Models)
11 Starter Motor (Electric Start Models)
12 Output Shaft (Drive Key supplied)
13 Output Shaft Flange
14 Engine Mounting Holes (4)
15 De-compression Switch
1
2
3
6
6
411
7
5
8
9
10
13
12
14 15

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© Böhler-AG 2017
AG-178FD / AG-192FD
Assembly
If the electric start switch block has been supplied unassembled, it will require attachment to the engine and the wiring connected. Attach the switch
block (B) to the brackets on the engine using the 2 supplied bolts. The mounting brackets on the engine may vary slightly between models, however,
the switch block is always located next to the starter motor. Connect wires as follows:
No. Wire Colour Use
1 Green Ignition
2 Red Starter Motor Power
3 White Starter Motor Earth
Typically, most engines are fully assembled,
however, some models may require the follow-
ing assembly (as applicable). The image below
shows an unassembled electric start model with
exhaust shroud.
Electric Start
Exhaust Shroud
Place the shroud (A) over the exhaust port – generally with the opening
facing down, and attach it using the 4 supplied screws. A
132
4
5
No. On Engine Use
4 Push Terminal Connect to ‘3’
5 Blue Wire Connect to ‘1’
6 Earth Terminal Connect to ‘2’
6

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© Böhler-AG 2017
AG-178FD / AG-192FD
Before Use Checklist
Ensure that you carry out all procedures below before starting the engine or op-
erating the equipment. All procedures described are generic in nature and slight
variations between different models may exist. Failure to follow the checklist and
carry out the procedures correctly may result in making the product warranty void. 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 Checking and Changing Engine Oil. Failure to add engine oil will void the product warranty.
Engine Oil
Air Filter
Four-stroke engines require engine oil in the crankcase for lubrication of internal components. Severe or irreparable damage may occur if the engine is
allowed to run without engine oil. The engine oil level requires regular maintenance. Check the engine oil level and ensure that the oil level is at or just
under the maximum level indicator.
Some machines may feature an oil level sensor that will prevent the engine being started or automatically stop the engine if the oil level falls below an
acceptable level. This system, however, is not to be solely relied upon. Always check that the engine oil level is at or near the “MAX” indicator before
starting the engine. See Checking and Changing Engine Oil.
The air filter is used to prevent dirt and other particles from possibly entering the engine and causing internal damage to it. The air filter requires regular
maintenance.
Always check the air filter before starting the engine. See Checking, Cleaning and Replacing the Air Filter.
Adequately fill the fuel tank with the correct fuel type.
• Use non-ethanol unleaded (higher RON values will provide best engine performance). Do not use old or contaminated fuel.
• To fill or top up fuel:
• Place the machine in an upright position on a flat and level surface.
• Clean the machine around the fuel filler so that no dirt or other material enters the engine when the cap is removed.
• Remove (rotate left) the fuel filler cap.
• Using a funnel, carefully fill the tank with fuel. Do not fill above the top of the strainer (if equipped) or otherwise overfill the tank.
• When finished, reinstall (rotate right) the fuel filler cap until firm. Wipe away any residual fuel from the machine. If fuel has been spilt, move the
pump away from the spillage before starting the engine.
Petrol/fuel/gasoline is extremely flammable – keep clear of naked flames or other
ignition sources. The engine must be cool before refuelling.
Fuel

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© Böhler-AG 2017
AG-178FD / AG-192FD
Priming the Fuel System
When an engine is new or has been completely run out of fuel it may be necessary to “prime” the
fuel system before attempting to start the engine. This means removing any air from the fuel line.
To prime:
• Fill the fuel tank with fuel.
• Remove the fuel line from the carburettor or fuel injector using pliers to loosen the hose-
clamp. Hold a container beneath the fuel line to catch any spilt fuel.
• Place the fuel tap (A) in the “ON” position and allow fuel to flow out (into the container) until
no air bubbles can be seen in the fuel stream.
• Push the fuel line back onto its connection point and re-fasten the hose clamp.
• Clean up any spilled fuel. If fuel has been spilt, move the pump away from the spillage before
starting the engine.
• Start the engine.
Before Use Checklist Continued
A

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© Böhler-AG 2017
AG-178FD / AG-192FD
Mounting & Connecting to the Engine
Always measure the actual unit before building or drilling mounting frames, drive pulleys
etc.
Each engine features a set of holes in the base for mounting and a keyed output shaft. It is essen-
tial that the engine be mounted to a suitable surface, frame etc that is capable of supporting the
weight of the engine as well as any twisting forces it generates.
25.4mm (1”) Output Shaft (not to scale)
Output Shaft Flange
Output Shaft
Engine Mounting

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© Böhler-AG 2017
AG-178FD / AG-192FD
Engine Starting and Operation
Before starting the engine, ensure that you have followed
all procedures described in the Before Use Checklist. The product is NOT sup-
plied 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 Checking and Changing Engine Oil. Failure to add engine oil will void the product warranty.
Different models may feature variations in design; for example, some have different engine types, electric start etc. The following procedures and
images are typical to all models, however, the position or appearance of controls etc may vary. All major engine controls are identified on the machine
by way of stickers or other markings.
Manual/Pull Starting
1. PRIME – If necessary, “prime” the fuel system.
2. FUEL – Place the fuel tap (A) in the “ON” position.
3. IGNITION – Place the engine ON/OFF switch (C) or key
switch (if equipped) in the “ON” (“START”) position. For key
switches, the “OFF” position allows the key to be removed from
the switch. The “ON” position is reached when the key is rotated
to the right from the “OFF” position.
4. START – Slowly pull out the starter cord (B) until you feel it
engage with the engine, then pull it out rapidly (use both hands if necessary). The
engine should start. Allow the starter cord to rewind slowly – do not let it “snap”
back.
5. WARM-UP – Allow the engine to warm-up and run smoothly.
6. THROTTLE – Adjust the throttle control (C) for the required engine speed and
pumping requirements.
If the engine does not start, repeat step 6 onward. If the engine fails to start after
several attempts, refer to Troubleshooting.
Electric Starting
For models equipped with an electric start option, charge the battery then connect a suitable battery cable (cables may be supplied) between the battery
POSITIVE (“+”) terminal and the starter solenoid POSITIVE terminal (this usually has rubber caps for the connectors). Then, connect a battery cable
between the battery NEGATIVE (“-“) terminal and the starter solenoid NEGATIVE terminal.
1. Follow steps 1 to 5 as per manual/pull starting.
2. START – Turn the ignition key fully to the right to engage the starter motor. The engine should start.
3. WARM-UP – Allow the engine to warm-up and run smoothly.
4. THROTTLE – Adjust the throttle control for the required engine speed and pumping requirements.
If the engine does not start, repeat step 2 onward. If the engine fails to start after several attempts, refer to Troubleshooting.
B A
C

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© Böhler-AG 2017
AG-178FD / AG-192FD
Jump Starting
Stopping the Engine
Engine Operation
Environmental Considerations
If the battery does not have enough charge to sufficiently crank the engine, the engine can be jump-started. Use a fully charged battery (the “jump”
battery) and suitable jump-starting cables. To jump-start:
1. Ensure the ignition is “OFF” (for some models, this is the position that allows the key to be removed).
2. Connect the jump battery positive (“+”) terminal to the engine battery positive (“+”) terminal.
3. Connect the jump battery negative (“-”) terminal to the engine battery negative (“-”) terminal.
4. Follow the normal electric start procedure from step 2 onward.
Stopping in an Emergency
1. To stop the engine immediately, place the engine ON/OFF switch or key switch in the “OFF”
position.
Stopping in Normal Use
2. Place the throttle control in the “SLOW” position.
3. Place the engine ON/OFF switch or key switch in the “OFF” position.
4. Place the fuel tap in the “OFF” position.
Once the engine is running and has warmed up, adjust the engine speed as required by moving the
throttle lever (C).
For electric start models, when the engine is running, normal battery charging will occur. The engine
must run for several hours to fully charge the battery.
Altitude
If the engine is being used in altitudes at or above 1500m (approximately 5000’),
adjustments to the carburettor may be required. This is because there is less
oxygen in the air as altitude increases, which effectively “enriches” the ratio of fuel
to air going into the engine and the higher the altitude, the richer the fuel mixture
becomes. If the engine is being permanently operated at high altitude, it is rec-
ommended to have an authorized service centre make the necessary carburettor
adjustments. If the engine is used occasionally at altitude (not extreme altitudes), no
adjustments should be required, however, a slight decrease in engine performance
can be expected.
Temperature
If the engine is being used in extremely cold or hot environments; for example,
desert or snow conditions, the type of engine oil may need to be changed to suit
environmental temperatures. Oil thickens as the temperature decreases and thins as temperature increases, which means that if the engine oil is not
suited to the temperature its ability to properly lubricate the engine may be affected. Use the chart above to determine the correct engine oil.
Engine Starting and Operation Continued
C

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© Böhler-AG 2017
AG-178FD / AG-192FD
Maintenance
Running combustion engines in confined areas CAN KILL IN MINUTES. Engine exhaust fumes contain car-
bon-monoxide – a deadly gas that you cannot smell or see. NEVER run a combustion engine in confined areas
EVEN IF windows and doors are open. ONLY run combustion engines OUTDOORS and away from doors, windows
and vents. • Petrol/fuel/gasoline is extremely flammable – keep clear of naked flames or other ignition sources.
• Do not have the engine running during inspection and maintenance unless specifically required. • The engine
should be cool enough to touch before performing maintenance activities. • Some maintenance activities described may be beyond the scope of some
users. For procedures that you are not comfortable with or have the tools or experience for, have the unit serviced by a service centre or qualified
technician.
Maintenance Schedule
Component/
Task Every Use First Month or 20 Hours Use
Every 3
Months or 50
Hours Use
Every 6
Months or 100
Hours Use
Every Year
or 300 Hours
Use
Engine Oil Check Replace
Oil Leaks Check/repair as
necessary
Air Cleaner Check Clean and replace as
necessary
Clean and replace as
necessary
Clean and replace as
necessary
Clean and replace as
necessary
Valve Clearance Adjust as necessary
Combustion Chamber De-coke as necessary
Idle Speed Check/adjust as
necessary
Fastners Check/tighten as
necessary
Fuel Tank Flush and clean
Fuel Line Replace as necessary Replace as necessary Replace as necessary Replace as necessary
Fuel Filter Clean and replace as
necessary
Clean and replace as
necessary
Clean and replace as
necessary
Clean and replace as
necessary
Fuel Strainer Check
To keep the machine performing at optimal efficiency, regular checks and maintenance is required. Proper care and maintenance ensures best perfor-
mance and longest service life.
The maintenance schedule below specifies preventative maintenance checks and necessary maintenance tasks and how often they should be per-
formed. The schedule applies to multiple engines; some engines may not include some components, so maintenance on those components is not
applicable.
Harsh operating environments such as extreme temperatures, dust etc may necessitate more
frequent maintenance. • Maintenance frequencies are based on general factors including a maximum use of approximately 300 hours per
year. Apply common-sense when following the maintenance schedule based on your actual use of the product. • Keep reasonable records
of maintenance activities for reference. 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.

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© Böhler-AG 2017
AG-178FD / AG-192FD
Checking and Changing Engine Oil
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. Failure to add
engine oil will void the product warranty. • Always check engine oil level when the machine is in an upright position on a flat
and level surface. • Do not use used or contaminated engine oils. • Use only engine oils of the correct type (see Specifica-
tions). • Perform the first oil change within the first 20 hours of use. Subsequently, change the oil every 20 hours of use. • It
is recommended that the engine be warm, but not hot, when performing oil changes. When the oil is warm it drains faster. • Using dirty or incorrect
engine oil may cause engine damage and void any warranty • Always use suitable tools. • Always dispose of used oil in an environmentally responsible
manner and according to regulations. • Some engines feature oil level detection, which will prevent the engine being started or automatically stop a run-
ning engine if there is insufficient oil. • Always check the oil level and ensure is at or near the “MAX” indicator before using the machine. • Some models
may have 2 oil drain plugs and fillers on either side of the engine – it does not matter which one is used.
Four-stroke engines require engine oil in the crankcase for lubrication of internal components. Severe or irreparable damage may occur if the engine is
allowed to run without engine oil. The engine oil level requires regular maintenance as per the maintenance schedule.
To check engine oil level:
1. Place the machine in an upright position on a flat and level surface.
2. Clean the machine around the oil filler cap (A) so that no dirt or other material enters the engine when the cap is removed.
3. Remove the oil filler cap (rotate left) until fully unscrewed. For machines without a dipstick, the oil level is determined by how close the oil is to the
edge of the filler hole. For machines equipped with an oil level dipstick:
• Remove the dipstick (A) and wipe clean with a piece of cloth or paper.
• Insert the dipstick into the oil filler but do not screw it in.
• Remove and inspect the dipstick – the oil level is determined by where oil can be seen on it.
4. Ensure that the oil level is at or just under the “maximum”. If the oil level is low, add additional
oil until the correct level is reached. If the oil level is too high, drain some oil until the correct level is
reached.
5. When finished, re-install (rotate right) the oil filler cap until firm. Wipe off any residual oil from the
machine.
Oil Filler Port
Fill the oil up to the mouth of the filler
port with the engine placed on the
level. When checking oil, simply dip
the Dipstick into the oil pan. Do not
screw in the Dipstick.
Engine Oil
We recommend A.P.I service classifi-
cation of CC or CD. Always use oil with
the correct viscosity for the ambient
temperature in which your engine
is being operated. Use the chart to
correctly choose your engine oil
A

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© Böhler-AG 2017
AG-178FD / AG-192FD
To change the engine oil:
1. Place the machine on a suitable work surface that is flat and level and have a container ready to catch drained oil.
2. Clean the machine around the oil drain plug (B) and oil filler (A) so that no dirt or other material enters the engine when the plug or cap is removed.
3. Unscrew (rotate left) and remove the drain plug and washer.
4. Tilt the machine and drain all oil from the engine. Once drained, allow the machine to sit level again.
5. Clean the drain plug and washer and then reinstall them. Screw in fully (rotate right) and firmly tighten.
6. Remove the oil filler cap (rotate left) until fully unscrewed. Wipe the oil level indicator clean with a piece of cloth or paper.
7. Using a funnel, carefully add oil to the engine until the “maximum” level is reached. Double- check the oil level (described above).
8. When finished, re-install (rotate right) the oil filler cap until firm. Wipe off any residual oil from the machine.
Checking and Changing Engine Oil Continued
A
B

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© Böhler-AG 2017
AG-178FD / AG-192FD
Checking, Cleaning or Replacing the Air Filter
Operating the machine without a functional air filter may cause severe engine damage
and will void
any warranty. A dirty or oil saturated air filter will restrict air flow, which can be mistaken
as fuel system problems. Check the condition of the air filter before adjusting engine idle speed,
where applicable. If the air filter is damaged (torn, broken, disintegrating), replace it.
The air filter is used to prevent dirt and other particles from possibly entering the engine and causing internal damage to it. The air filter requires regular
maintenance as per the maintenance schedule.
Air Filter Inspection and Cleaning
Inspect the air filter for dirtiness and debris, damage etc. Clean or replace the filter element as necessary. To clean air filters:
• For foam filters, wash the filter in warm water and mild detergent, then rinse and allow to dry.
• For paper filters, use compressed air to blow particles from it. The air should be blown from the engine
• side of the filter.
• Clean all other air filter assembly components using water and mild detergent, then dry them.
• For foam filters, place a few drops of clean engine oil on the filter then squeeze it a few times to spread the oil through the filter material and
remove any excess oil.
Air Filter Removal/Installation
To remove the air filter:
1. Unscrew (rotate left) the wing nut (B) securing the air filter cover (C) and remove the cover from the air
2. intake assembly (A).
3. Unscrew (rotate left) the wing nut (D) and remove the filter element (E).
To install the air filter:
1. Re-install the filter element and ensure it is seated correctly on the air intake assembly.
2. Re-install (rotate right) the wing nut and tighten by hand so that the filter element is secure. Do not over- tighten.
3. Re-install the filter cover and secure it with the wing nut (rotate right). Tighten the nut by hand. Do not over-tighten.

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© Böhler-AG 2017
AG-178FD / AG-192FD
Transportation and Storage
Always ensure that the machine is cool enough to touch before transporting
or storing. Petrol/fuel/gasoline is extremely flammable – keep clear of naked
flames or other ignition sources. Always transport the machine with the
fuel tap and engine ON/OFF switch in the “OFF” position. Drain the fuel tank before transportation
or storage.
• Drain the fuel system by allowing the engine to run until it stops.
• Ensure the fuel tap, engine ON/OFF switch (or key switch, if applicable) are in the “OFF” position.
• Avoid exposing the equipment to direct sunlight, particularly during transportation.
• Ensure the equipment is secure and upright during transport.
• Store the unit in a dry, well-ventilated area and out of the reach of children.
Long Term Storage
Follow the normal procedures for storage, then:
• Drain the fuel system. It is advised to have the fuel tank as empty as possible before draining.
1. Unscrew (rotate left) the carburettor drain plug. Use a suitable container to catch the draining fuel, and allow the fuel to drain. Store the drained
fuel in a properly sealed container.
2. Re-install (rotate right) the carburettor drain plug and tighten.
• Remove the spark plug and put 30ml of clean engine oil into the cylinder. Pull the starter rope slowly to distribute the oil. Re-install the spark plug.
• Cover the equipment to protect it from dirt and dust.
Preparing for Transport and Storage

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© Böhler-AG 2017
AG-178FD / AG-192FD
Troubleshooting
Running combustion engines in confined areas CAN KILL IN MINUTES. Engine exhaust fumes contain carbon-
monoxide – a deadly gas that you cannot smell or see. NEVER run a combustion engine in confined areas EVEN IF
windows and doors are open. ONLY run combustion engines OUTDOORS and away from doors, windows and vents.
• Petrol/fuel/gasoline is extremely flammable – keep clear of naked flames or other ignition sources. 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 Checking and Changing Engine Oil.
Failure to add engine oil will void the product warranty. • Do not have the engine running during inspection and maintenance unless specifically required. •
The engine should be cool enough to touch before performing maintenance activities. • Some maintenance activities described may be beyond the scope
of some users. For procedures that you are not comfortable with or have the tools or experience for, or if problems persist after following all suggested
actions, contact a service centre or qualified technician.
The following information may assist in identifying a problem amd rectifying it.
Difficulty Starting the Engine
Possible Fault Action
Lack of fuel Check that there is fuel in the tank and the fuel tap is in the “ON” position. • To further check if fuel is reaching
the carburettor, remove the carburettor drain plug and check if fuel drains.
Engine ‘OFF’ Ensure engine ON/OFF switch is in the “ON” position.
Engine ‘Flooded’ with fuel Place the choke in “HOT” or “RUN” position. Leave the ON/OFF switch in the “OFF” position. Pull the starter
cord several times to assist 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.
Possible Fault Action
Blocked Air Filter Check and clean the Air Filter
Idle speed requires adjustment Adjust the idle speed until the engine runs smoothly and at a reasonable speed when idling
Engine Starts but does not Idle

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© Böhler-AG 2017
AG-178FD / AG-192FD
Troubleshooting Continued
Possible Fault Action
No fuel or engine oil Check fuel level and ensure adequate fuel is available. For some 4-stroke engines, an engine oil sensor will
automatically switch off the engine or prevent starting if a low engine oil level is detected.
Overheating Allow engine to cool before restarting. If possible, improve engine cooling, such as operating in lower tempera-
tures or in shade etc.
Difficulty restarting the engine after use or engine stops suddenly during use.
Carburettor blocked Clean the carburettor.
Possible Fault Action
Blocked Air Filter Check and clean air filter.
Carbon build-up in engine and/or entry
to exhaust silencer
Remove the engine cylinder head and clean any carbon from the combustion chamber. For the exhaust silencer,
remove it and clean any carbon deposits from the exhaust entry port.
Reduced Engine Speed/Power During Use
Carburettor blocked Clean the carburettor.

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© Böhler-AG 2017
AG-178FD / AG-192FD
Specifications
AG - 178 FD
Engine Type 4-Stroke, single cylinder
Fuel Type Unleaded non-ethanol petrol
Fuel Tank Capacity 3.6L
Spark Plug Type F7TC, F7RTC
Spark Plug Gap 0.7 to 0.8mm (0.028 to 0.032”)
Valve Clearance Inlet: 0.15mm ± 0.02mm (0.006” to 0.001”)
Exhaust: 0.2mm ± 0.02mm (0.008” to 0.001”)
Engine Oil Type SAE 10W-30 automotive engine oil recommended for general use
Engine Oil Capacity Approximately 0.6L (always check level)
AG - 192 FD
Engine Type 4-Stroke, single cylinder
Fuel Type Unleaded non-ethanol petrol
Fuel Tank Capacity 6L
Spark Plug Type F7TC, F7RTC
Spark Plug Gap 0.7 to 0.8mm (0.028 to 0.032”)
Valve Clearance Inlet: 0.15mm ± 0.02mm (0.006” to 0.001”)
Exhaust: 0.2mm ± 0.02mm (0.008” to 0.001”)
Engine Oil Type SAE 10W-30 automotive engine oil recommended for general use
Engine Oil Capacity Approximately 1.1L (always check level)