Generac Power Systems Trimmer/Mower User manual

Owner’s Manual
Trimmer/Mower™
MODEL NUMBER: _________________________
SERIAL NUMBER: _________________________
DATE PURCHASED:________________________
005813
SAVE THIS MANUAL FOR FUTURE REFERENCE
Register your Generac product at:
WWW.GENERAC.COM
1-888-GENERAC
(888-436-3722)

ii Owner’s Manual for Trimmer/Mower™
(000393a)
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.

Owner’s Manual for Trimmer/Mower™ iii
Table of Contents
Section 1: Safety Rules & General
Information
Introduction ..................................................................1
Read This Manual Thoroughly ....................................1
Safety Rules .................................................................1
How to Obtain Service .................................................1
General Hazards ...........................................................2
Exhaust and Fuel Hazards ..........................................2
Fire Hazards .................................................................3
Explosion Hazards .......................................................3
Safety and Operating Decals .....................................4
Section 2: General Information and Setup
Emissions .....................................................................5
Remove Contents from Carton ...................................6
Installing Wheels ..........................................................6
Adjusting Trimmer/Mower........................ Handlebar 6
Installing Cutting Cords ..............................................6
Cutting Cord Tips ........................................................6
Attaching Cord Caddy .................................................7
Adding Oil .....................................................................7
Adding Fuel ..................................................................8
High Altitude Replacement Kit ....................................8
Section 3: Operation
Operation and Use Questions ...................................9
Before Starting Engine ................................................9
Starting the Unit .........................................................10
Stopping the Engine ..................................................10
Operating Tips ............................................................10
Heavy Growth ............................................................10
Section 4: Maintenance and
Troubleshooting
Maintenance ...............................................................11
Replacing Quick-Lock Head .....................................12
Quick Lock Head Disassembly ..................................12
Quick-Lock Head Assembly ......................................12
Head Height Adjustment ...........................................12
Maintaining Cord Head ..............................................13
Replacing Trimmer Belt .............................................14
Changing Air Filter .....................................................14
Changing Engine Oil ..................................................15
Servicing Spark Plug .................................................15
Replacing Wheels ......................................................15
Troubleshooting ........................................................16

iv Owner’s Manual for Trimmer/Mower™
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Safety Rules & General Information
Owner’s Manual for Trimmer/Mower™ 1
Section 1: Safety Rules & General Information
Introduction
Thank you for purchasing a Generac Power Systems Inc.
product. This unit has been designed to provide high
performance, efficient operation, and years of use when
maintained properly.
The information in this manual is accurate based on
products produced at the time of publication. The
manufacturer reserves the right to make technical
updates, corrections, and product revisions at any time
without notice.
Read This Manual Thoroughly
If any section of this manual is not understood, contact
Generac Customer Service at 1-888-436-3722 (1-888-
GENERAC), or www.generac.com with any questions
or concerns.
This manual must be used in conjunction with the
appropriate installation manual.
SAVE THESE INSTRUCTIONS: The manufacturer
suggests that this manual and the rules for safe operation
be copied and posted near the unit installation site.
Safety should be stressed to all operators and potential
operators of this equipment.
Safety Rules
The manufacturer cannot anticipate every possible cir-
cumstance that might involve a hazard. The alerts in this
manual, and on tags and decals affixed to the unit, are
not all inclusive. If using a procedure, work method, or
operating technique that the manufacturer does not spe-
cifically recommend, verify that it is safe for others and
does not render the equipment unsafe.
Throughout this publication, and on tags and decals
affixed to the unit, DANGER, WARNING, CAUTION, and
NOTE blocks are used to alert personnel to special
instructions about a particular operation that may be
hazardous if performed incorrectly or carelessly. Observe
them carefully. Alert definitions are as follows:
NOTE: Notes contain additional information important to
a procedure and will be found within the regular text of
this manual.
These safety alerts cannot eliminate the hazards that
they indicate. Common sense and strict compliance with
the special instructions while performing the action or
service are essential to preventing accidents.
How to Obtain Service
When the unit requires service or repairs, contact
Generac Customer Service at 1-888-436-3722 (1-888-
GENERAC), or www.generac.com for assistance.
When contacting Customer Service about parts and
service, always supply the complete model and serial
number of the unit as given on its data decal located on
the unit. Record the model and serial numbers in the
spaces provided on the inside front cover of this manual.
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

Safety Rules & General Information
2Owner’s Manual for Trimmer/Mower™
General Hazards
Exhaust and Fuel Hazards
(000128a)
Personal injury. Keep out of reach of children.
Failure to do so could result in death or serious injury.
WARNING
(000377)
WARNING
Vision loss. Eye protection is required when
servicing unit. Failure to do so could result in
vision loss or serious injury.
WARNING
Personal injury and equipment damage. Do not
tamper with engine governed speed. Operating
engine too fast or slow increases the risk of injury
or permanent engine damage. (000254)
(000115)
WARNING
Moving Parts. Do not wear jewelry when
starting or operating this product. Wearing
jewelry while starting or operating this product
could result in death or serious injury.
(000111)
WARNING
Moving Parts. Keep clothing, hair, and
appendages away from moving parts. Failure
to do so could result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.
WARNING
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to service
this equipment and could result in death or serious
injury. (000215)
(000107)
WARNING
Hearing Loss. Hearing protection is
recommended when using this machine.
Failure to wear hearing protection could
result in permanant hearing loss.
WARNING
(000492)
Personal injury. Wear sturdy shoes with no-slip tread,
long pants, and gloves when operating this unit.
Failure to do so could result in death or serious injury.
Asphyxiation. Running engines produce
carbon monoxide, a colorless, odorless,
poisonous gas. Carbon monoxide, if not
avoided, will result in death or serious injury.
(000103)
DANGER
(000143)
DANGER
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Store fuel in a well
ventilated area. Keep fire and spark away. Failure
to do so will result in death or serious injury.
(000166b)
DANGER
Explosion and Fire. Do not overfill fuel tank. Fill to
1/2 inch from top of tank to allow for fuel expansion.
Overfilling may cause fuel to spill onto engine causing
fire or explosion, which will result in death or
serious injury.
(000174)
DANGER
Risk of fire. Allow fuel spills to completely dry
before starting engine. Failure to do so will
result in death or serious injury.
WARNING
Fire risk. Fuel and vapors are extremely
flammable. Do not operate indoors. Doing so
could result in death, serious injury, or
property or equipment damage. (000281)

Safety Rules & General Information
Owner’s Manual for Trimmer/Mower™ 3
Fire Hazards
Explosion Hazards
WARNING
Explosion and fire risk. Do not smoke near unit.
Keep fire and spark away. Failure to do so could
result in death, serious injury, or property or
equipment damage. (000282)
WARNING
Explosion and Fire. Do not smoke while
refueling unit. Failure to do so could result in
death, serious injury, or property or equipment
damage. (000284a)
(000109)
WARNING
Risk of Fire. Verify machine has properly
cooled before installing cover and storing
machine. Hot surfaces could result in fire.
Risk of fire. Never operate engine without
the air cleaner installed. Operating engine
without the air cleaner could result in death
or serious injury.
WARNING
(000249)
WARNING
Fire hazard. Do not obstruct cooling and
ventilating airflow around the generator. Inadequate
ventilation could result in fire hazard, possible
equipment damage, death or serious injury. (000217)
(000192)
DANGER
Explosion and fire. Fuel and vapors are extremely
flammable and explosive. No leakage of fuel is
permitted. Keep fire and spark away. Failure to do
so will result in death or serious injury.
(000174)
DANGER
Risk of fire. Allow fuel spills to completely dry
before starting engine. Failure to do so will
result in death or serious injury.
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.

Safety Rules & General Information
4Owner’s Manual for Trimmer/Mower™
Safety and Operating Decals
This unit features numerous safety and operating decals. These decals provide important operating instructions and
warn of dangers and hazards. Replace damaged or missing safety and operating decals immediately.
005999
006701
MUSTADD OIL !
006706
006703
006705
006002
006009
006704

Owner’s Manual for Trimmer/Mower™ 5
General Information and Setup
Section 2: General Information and Setup
Figure 2-1. Features and Controls
A complete specification sheet is included in the
documentation provided with the unit at the time of
purchase. For additional copies, contact Generac
Customer Service at 1-888-436-3722 (1-888-
GENERAC), or www.generac.com
Emissions
The United States Environmental Protection Agency (US
EPA) (and California Air Resources Board (CARB), for
engines/equipment certified to California standards)
requires that this engine/equipment complies with exhaust
and evaporative emissions standards. Locate the emissions
compliance decal on the engine to determine applicable
standards. For emissions warranty information, please ref-
erence the included emissions warranty. It is important to
follow the maintenance specifications in the manual to
ensure that the engine complies with the applicable emis-
sions standards for the duration of the product’s life.
005826
A
B
F
E
D
G
H
C
AHandlebar Adjuster
BOil Fill
CRecoil Starter
DBail Bar
EFuel Fill
FFuel Primer
GQuick-Lock™ Trimmer Head
HTrimmer Guard
Trimmer/Mower™ Specifications
Cutting Width 22 in (55.88 cm)
Cutting Height Three Position, 2 in (5 cm),
2.75 in (7 cm), 3.25 in (8.26 cm)
Cutting Speed 3700 rpm
Cord Size 0.175 in (4.45 mm)
225 mil sawtooth available
Wheels 16 in (30.64 cm)
Frame 14 Gauge Steel
Mow-Ball® 4 in (41 cm) Diameter, Super-Tough
Nylon
Drive Belt V-Belt, 3L440R
Machine
Dimensions
35 in x 22.25 in x 24 in
(88.9 cm x 56.5 cm x 60.9 cm)
Machine Weight 57 lbs (26 kg)
Handlebar Height 31 in – 49 in
(78.7 cm – 124.5 cm)
Accessories
Premium Generac Pro Trimmer Cord
(225-mil Sawtooth Cord, 82' Roll),
Quick-Lock Pre-Cut Cord (155-mil
green, 13", 48 Pk), Quick-Lock™ Pre-
Cut Cord (13" Pre-Cut 175-mil, 48 Pk),
DuraBlade® Kit for Trimmer Mower,
TrimSafe Guard Kit
Engine Specifications
Engine Generac G-Force
Starting Type Manual
Fuel Tank Capacity .21 gal (.8 L)
Oil Capacity 16.9 oz (.5 L)
Oil Type See chart in Adding Oil.
Spark Plug TORCH K7RTC or equivalent
Spark Plug Gap .019-.027 in (0.5-0.7 mm)

6Owner’s Manual for Trimmer/Mower™
General Information and Setup
Remove Contents from Carton
1. See Table 1. Remove and verify carton contents prior
to assembly. Carton contents should contain the fol-
lowing:
Table 1 – Parts Supplied
2. Contact Generac Customer Service at 1-888-436-
3722 (1-888-GENERAC), or www.generac.com-
with the unit model and serial number for any miss-
ing carton contents.
3. Record model, serial number, and date of pur-
chase on front cover of this manual.
Installing Wheels
1. See Table 2-2. Insert .510" X .875" X .1" washer
(A) onto axle.
Figure 2-2. Wheel Installed
2. Slide wheel onto axle with plastic hub facing out.
3. Install 7/16-20 locknut (B).
4. Repeat for the other wheel.
Adjusting Trimmer/Mower Handlebar
1. See Figure 2-3. Verify handlebar mounting bolts
(A) are tight.
Figure 2-3. Lower Handlebar Bolts
2. See Figure 2-4 . Loosen adjustment knob (B) on both
sides and position handlebar at comfortable height.
Figure 2-4. Handlebar Adjustments
3. Tighten both adjustment knobs.
NOTE: Verify adjuster teeth (C) mesh.
Installing Cutting Cords
NOTE: Always install all four trimmer cords with cords of
equal length. Not installing all four cords or installing
cords of varying lengths will cause excessive vibration
and could damage the machine.
1. See Figure 2-5. Insert trimmer cord (A) into inlet
hole (B) and push it in until the end protrudes out
the other side (C) about 1/2 in (12.7 mm).
Figure 2-5. Installing Cutting Cords
2. Repeat until all four cords are installed.
NOTE: The cord can only move through the cord head in
one direction. To remove an old cord the cord must be
pulled through the cord head.
Cutting Cord Tips
•Do not store cords in sunlight. UV light causes pre-
mature wear.
•Keep cords pliable by soaking them in room tem-
perature water for a few days before use.
•Replace cords one at a time and use old cord to
mark the position for new cord being installed.
•Remove any cord broken off flush at the line plate
with needle nose pliers.
• Do not add additional cords to the head. Adding addi-
tional cords creates drag and may cause wrapping.
Description QTY
Nut, Nylon Lock, 7/16-20, LP 2
Cord Caddy 1
#10 Screw 2
#10 Nylon Locknut 2
005951
A
B
00952
A
005953
C
B
006358
A
B
C

Owner’s Manual for Trimmer/Mower™ 7
General Information and Setup
Attaching Cord Caddy
1. See Figure 2-6. Attach top and bottom caddy
clamps (A) on handle bar.
Figure 2-6. Manual Caddy
2. Secure manual caddy with #10 screw and #10
nylon locknut (B) and tighten
Adding Oil
IMPORTANT NOTE: The unit is shipped without oil in
the engine. Oil must be added prior to operation.
1. Place unit on a firm, level surface, and verify
engine is cooled.
2. See Figure 2-7. Remove oil dipstick/ fill cap (A)
and wipe dipstick clean.
Figure 2-7. Oil Fill and Dipstick Location
3. Add 14 oz (414 mL) of engine oil. See Table 2:
Engine Oil Requirements to select the recom-
mended viscosity grade by temperature. SAE
15W-40 is recommended for general use.
Table 2 – Engine Oil Requirements
4. Wait one minute for oil to settle.
5. See Figure 2-8. Reinsert dipstick into oil filling hole
without screwing it in and verify oil level is in the
crosshatched section (A).
Figure 2-8. Oil Range
6. If oil level is low add a few ounces of oil at a time.
Check dipstick frequently to prevent overfill. Do not
overfill
7. Install oil fill cap/dipstick and hand-tighten.
006813
A
B
B
A
(000135)
CAUTION
Engine damage. Verify proper type and quantity of
engine oil prior to starting engine. Failure to do so
could result in engine damage.
(000210)
WARNING
Skin irritation. Avoid prolonged or repeated contact with
used motor oil. Used motor oil has been shown to cause
skin cancer in laboratory animals. Thoroughly wash
exposed areas with soap and water.
005958
A
SAE 30
5W-30
10W-30
006809
A

8Owner’s Manual for Trimmer/Mower™
General Information and Setup
Adding Fuel
NOTE: Never use contaminated gasoline or mixed gaso-
line with oil. don’t allow dust, foreign matter or water to
enter into the fuel tank.
1. Place unit on a firm, level surface in a well venti-
lated area.
2. Verify unit is OFF and cooled for a minimum of two
minutes,
3. See Figure 2-9. Clean area about fuel cap (A) and
remove cap slowly (A).
Figure 2-9. Fuel Cap Location
4. Fill tank with fresh, unleaded gas (with a minimum
85 octane rating) to 0.25 in (6.4 mm) from the bot-
tom of the fill neck to allow for fuel expansion.
5. Install fuel fill cap.
NOTE: Allow spilled fuel to evaporate before starting
unit.
High Altitude Replacement Kit
At high altitude, the standard carburetor air-fuel mixture
will be too rich. Performance will decrease and fuel
consumption will increase. A very rich mixture will also
foul the spark plug and cause hard starting. Operation at
an altitude that differs from that at which this engine was
certified, for extended periods of time, may increase
emissions.
Proper operation at higher altitudes can be ensured by
installing an altitude kit when required. See Table 3:
High Altitude Replacement Kit to determine when an
altitude kit is required.
Table 3 – High Altitude Replacement Kit
Kits can be obtained by contacting Generac Customer
Service at 1-888-436-3722 (1-888-GENERAC), or
www.generac.com. Kits must be installed by a qualified
individual.
NOTE: If a
carburetor is replaced, the proper high altitude kit
jet will
need to be installed into the replacement carburetor.
NOTE: The warranty may be void if necessary
installation of a high altitude kit is not made for high alti-
tude use.
(000105)
DANGER
Explosion and Fire. Fuel and vapors are
extremely flammable and explosive. Add fuel
in a well ventilated area. Keep fire and spark
away. Failure to do so will result in death
or serious injury.
(000214)
DANGER
Explosion and Fire. Do not fill fuel tank past full line.
Allow for fuel expansion. Overfilling may cause fuel
to spill onto engine causing fire or explosion, which
will result in death or serious injury.
WARNING
Explosion and Fire. Do not smoke while
refueling unit. Failure to do so could result in
death, serious injury, or property or equipment
damage. (000284a)
005958
A
Altitude Range Part Number
0-3000 ft Not required
3000-6000 ft 10000035131
6000-8000 ft 10000035106

Owner’s Manual for Trimmer/Mower™ 9
Operation
Section 3: Operation
Operation and Use Questions
Contact Generac Customer Service at 1-888-436-3722
(1-888-GENERAC), or www.generac.com with
questions or concerns about unit operation and
maintenance.
Before Starting Engine
IMPORTANT NOTE: Oil must be added before start-
ing the engine for the first time. Units are shipped
without oil. Do not overfill.
1. See Figure 1. Check engine oil level (A). See
Attaching Cord Caddy for more information.
Figure 3-1. Oil and Fuel Fill
2. Check fuel level (B).
WARNING
(000487)
Personal injury. Never use this machine for other than the
intended purpose of trimming, mowing grass, weeds, and
other growth as specified in the Owner’s manual. Failure to
do so could result in serious injury or equipment damage.
WARNING
(000451)
Personal injury. Never put hands, face, feet, or clothing
under the deck or near the discharge area while the
unit is running. Doing so could result in death or
serious injury.
WARNING
Accidental startup. Shut engine OFF, allow to cool, and
remove plug wire before clearing debris from trimmer
guard. Failure to do so could result in death or serious
injury. (000579)
WARNING
(000410)
Projectile risk. Remove all debris from work area
before operating unit. Failure to do so could result in
death, serious injury, or property or equipment
damage.
WARNING
(000408)
Projectile risk. Be aware of surroundings at all times when
operating unit. Disengage mower blades if people or animals
enter the work space. Failure to do so could result in death,
serious injury, or property damage.
WARNING
Risk of flying objects. Be aware of surroundings at all
times. Release bail bar and shut engine OFF if people or
animals enter within 100 ft of the work space. Failure to
do so could result in death or serious injury. (000485)
WARNING
Risk of flying objects. Shut engine OFF when traveling
over loose items such as gravel or mulch. Failure to
do so could result in serious injury or property damage.
(000486)
WARNING
Personal injury. Use caution when trimming around
fencing, wires, ropes, and hoses. These can become
tangled around the line plates of the machine, and could
result in serious injury or equipment damage. (000489)
WARNING
(000460)
Personal injury. Use caution when operating unit over
uneven terrain or slopes. Failure to do so could result
in death, serious injury, equipment or property
damage.
CAUTION
Equipment damage. Clear the engine of grass and
debris before each use. Failure to do so could result
in engine damage.
(000490)
005958
A
B
005958
B
A

10 Owner’s Manual for Trimmer/Mower™
Operation
Starting the Unit
1. See Figure 3-3. For cold start push primer (A)
three times before starting. This step is not
required when starting a warm engine which has
already run for a few minutes.
Figure 3-2. Primer Bulb
1. See Figure 3-3. To engage trimmer head, pull bail
bar (B) back to the handlebar. Release handle to
stop engine.
Figure 3-3. Throttle Control Lever and Key Switch
2. Grasp recoil starter handle (C) and slowly pull until
resistance is felt. Let the cord retract slightly and
then pull the cord rapidly to start the engine.
Stopping the Engine
Release bail bar.
Operating Tips
•Experiment with different cord weights to deter-
mine the best cord weight for different mowing and
trimming applications.
•Use the smallest diameter cord for the application
run at the highest engine speed.
•When trimming, allow the front end of the machine
to rest lightly on the Mow-Ball®or keep the mow
ball raised slightly above the ground.
•When mowing, the Mow-Ball should glide on the
ground.
•Do not lift the handlebar while operating the unit.
Lifting the handlebar uses more energy, slows cut-
ting speed, and produces an unsatisfactory cut.
•The Trimmer/Mower‘™ can be used to trim or mow
wet material.
•See Figure 3-4. Cut and trim tall grass and weeds
with cutting material to the left of the unit, maintain-
ing a clear discharge area to the right.
Figure 3-4. Cut with the Material to the Left
Heavy Growth
•Use a 225-mil sawtooth cord on thicker growth
such as berry canes, brambles, thistles, or rag-
weed.
•Ease the cutting cords into dense growth slowly.
•Cut heavy grass in multiple passes. On the first
pass lift the trimmer head off the ground a few
inches by pushing down on the handlebar and cut
the material at this height. Make a second pass
with the Mow-Ball®close to the ground.
005960
A
B
A
005960
B
C

Owner’s Manual for Trimmer/Mower™ 11
Maintenance and Troubleshooting
Section 4: Maintenance and Troubleshooting
Maintenance
Regular maintenance will improve performance and extend
engine/equipment life. Regular maintenance, replacement,
or repair of the emissions control devices and systems may
be performed by any repair shop or person of the owner’s
choosing. To obtain emissions control warranty service free
of charge,
contact Generac Customer Service at 1-888-
436-3722 (1-888-GENERAC), or www.generac.com
.
See the emissions warranty.
Maintenance Schedule
(000102)
WARNING
Accidental Start-up. Disconnect spark plug wire when
working on unit. Failure to do so could result in death
or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
Procedure Before
Each Use
Every 25
Hours
Every 50
Hours
Every 100
Hours
Check engine oil level 
Clean engine exterior, cooling fins, and remove collected grass* 
Check general equipment condition 
Replace broken or frayed cutting cords 
Check Quick-Lock™ plate assembly for excessive wear 
Check trimmer belt for stretching and replace if necessary. See
Replacing Trimmer Belt
1st time 2
hours 
Lubricate engine control cable with SAE 30 oil 
Replace engine oil 1st time 5
hours 
Replace engine air filter cartridge and foam pre-filter if equipped 
Remove trimmer guard and clean out any collected debris 
Replace spark plug 
* Cleaning the top of the engine during use is critical for proper air flow.

12 Owner’s Manual for Trimmer/Mower™
Maintenance and Troubleshooting
Replacing Quick-Lock Head
Quick Lock Head Disassembly
1. See Figure 4-1. Align the hole in the anti wrap can-
ister (A) with the hole in the internal housing.
Figure 4-1. Quick Lock Head Disassembly
2. Insert a Phillips-head screwdriver through the hole
in the anti wrap canister and into the hole in the
internal housing.
3. Rotate the Mow-Ball® assembly until the screw
driver slides into a hole in the shaft.
4. Turn the Mow-Ball® clockwise and unscrew the
Mow-Ball from the bearing house.
NOTE: If the Mow-Ball® continues to turn, but does not
come off, verify the screwdriver is locked into the shaft.
NOTE: If the Mow-Ball will not turn by hand, loosen the
bolt in the bottom of the Mow-Ball® with a 9/16" socket.
5. Slide the line plates off the shaft.
Quick-Lock Head Assembly
NOTE: Improper installation can damage trimmer bear-
ings.
1. See Figure 4-2. Install molded spacers (A), quick
lock (B) and adapter (C) onto the shaft.
Figure 4-2. Cord Head Assembly
2. Place Mow-Ball® bolt (D) into the hex cavity of
Mow-Ball (E).
3. See Figure 4-3. Align the hole in the anti wrap can-
ister with a hole in the internal housing and insert a
Phillip head screwdriver through both holes (F).
Figure 4-3. Quick Lock Head Assembly
4. While holding the Mow-Ball bolt head in place turn
the Mow-Ball counterclockwise to start the bolt
onto the shaft.
5. Continue turning the Mow-Ball until tight.
Head Height Adjustment
The following steps adjust cord head height in 1-1/2 in
(3.81 cm) increments.
1. See Figure 4-4. Remove Mow-Ball (A) quick lock
(B) and adapter, and spacers (C) off the shaft. Do
not remove anti-wrap canister (D).See Quick Lock
Head Disassembly
2. For a middle cutting height setting, install one
spacer (B), the quick lock with adapter (C), fol-
lowed by the second spacer (B) onto shaft.
Figure 4-4. Middle Cutting Height Setting
006359
A
006356
B
C
D
E
A
006359
F
006359
WARNING
Personal injury. Verify all tools have been removed
from unit after service. Failure to do so could result
in personal injury or equipment damage.
(000491)
006359
A
C
D
B

Owner’s Manual for Trimmer/Mower™ 13
Maintenance and Troubleshooting
3. See Figure 4-5. For the highest trimmer setting,
install the quick lock with adapter (C), followed by
both spacers (B) onto the shaft.
4. Place Mow-Ball® bolt into the hex cavity of Mow-
Ball (A).
5. While holding the Mow-Ball bolt head in place turn
Mow-Ball counterclockwise to start the bolt onto
the shaft.
6. Continue turning the Mow-Ball until tight.
Figure 4-5. Highest Cutting Height Setting
Maintaining Cord Head
1. See Figure 4-6. Remove Mow-Ball (A), quick lock
with adapter (B), and molded spacers (C) from
shaft. Do not remove anti-wrap canister. See
Quick Lock Head Disassembly.
Figure 4-6. Cord Head Disassembly
2. See Figure 4-7 . Remove the four screws (E) secur-
ing line plates (F) together with a 3 mm Allen wrench.
Figure 4-7. Cord Head
3. See Figure 4-8. Remove springs (G) and locking
cams (H) from the middle and bottom plates and
clean any grass or debris from springs and cams.
Figure 4-8. Springs and Locking Cams
4. Clean all plates using a nylon brush and clean rag.
5. Inspect springs and cams for damage. If any parts
are damaged, contact Generac Customer Service
at 1-888-436-3722 (1-888-GENERAC), or
www.generac.com to order a replacement.
6. Reinstall springs and locking cams and verify
springs and cams are seated fully into plate grooves.
7. See Figure 4-9. Assemble the plate and verify the
plates align properly. The four screw holes on top
must align and cutouts (I) should align from plate to
plate on the sides.
Figure 4-9. Plate Assembly
006360
D
A
B
C
WARNING
Personal injury. Verify all tools have been removed
from unit after service. Failure to do so could result
in personal injury or equipment damage.
(000491)
006359
A
B
C
005973
E
F
006362
G
H
006363
I
I

14 Owner’s Manual for Trimmer/Mower™
Maintenance and Troubleshooting
8. Secure the cord head assembly with four screws
using a 3 mm Allen wrench.
9. See Figure 4-10. Install cord head (J) and adapter
onto the shaft.
Figure 4-10. Assembly
10. Install molded spacers (K) onto shaft.
11. Reinstall Mow-Ball (L). See Head Height Adjust-
ment.
Replacing Trimmer Belt
NOTE: Use only Generac Pro belts. To order a replace-
ment, contact Generac Customer Service at 1-888-436-
3722 (1-888-GENERAC), or www.generac.com.
1. Tip the machine back to allow access to the under-
side of the unit.
2. See Figure 4-11. Remove trimmer cords from
head assembly.
3. Remove four trimmer guard bolts and flat washers
(B) with a 3/8" wrench. Remove trimmer guard.
Figure 4-11. Trimmer Guard
4. See Figure 4-11. Move idler arm (C) away from
belt (D) and lift belt off idler pulley (E).
Figure 4-12. Assembly
5. Remove belt from around engine and head assem-
bly pulleys
6. Install a new drive belt around engine and head
assembly pulleys.
7. Move idler in and install belt onto idler pulley.
8. Secure trimmer guard with four bolts and flat wash-
ers using a 3/8" wrench.
9. Install trimmer cord.
Changing Air Filter
To order a replacement air filter, contact Generac Cus-
tomer Service at 1-888-436-3722 (1-888-GENERAC), or
www.generac.com.
1. See Figure 4-13. Remove air filter cover (A).
2. Remove filter (B)..
3. Install new filter.
4. Install air filter cover.
Figure 4-13. Air Filter Replacement
006360
J
L
K
WARNING
Personal injury. Verify all tools have been removed
from unit after service. Failure to do so could result
in personal injury or equipment damage.
(000491)
006622
B
006623
C
E
D
005958
A
B

Owner’s Manual for Trimmer/Mower™ 15
Maintenance and Troubleshooting
Changing Engine Oil
NOTE: Drain oil when engine is warm. Warm oil drains
more completely.
1. Clean area around oil fill.
2. See Figure 4-14. Remove oil cap/dipstick (A).
3. Position a suitable oil receptacle beside oil fill tube.
4. Verify fuel filler cap (B) is securely tightened.
Figure 4-14. Changing the Oil
5. Tip machine over receptacle and drain oil out the
oil filler tube and into the receptacle
6. Add 14 oz (414 mL) of engine oil. See Adding Oil
for oil requirements.
7. Wait one minute for oil to settle.
8. See Figure 4-15. Reinsert dipstick into oil filling
hole without screwing it in and verify oil level is in
the crosshatched section (A).
Figure 4-15. Oil Range
9. If oil is low add a few ounces of oil at a time. Check
dipstick frequently to prevent overfill. Do not overfill
10. Install oil fill cap/dipstick and hand-tighten.
Servicing Spark Plug
To ensure the engine runs efficiently, the gap of the spark
plug must be correct. To service the spark plug:
1. Clean area around spark plug.
2. Remove spark plug.
3. clean the electrodes with a metal brush and
remove any build up.
4. See Figure 4-16. Measure spark plug clearance
with a fueler gauge. The clearance should be .019-
.027 in (0.5-0.7 mm). If adjustment is necessary,
bend the side electrode carefully.
Figure 4-16. Spark Plug
5. Replace spark plug if electrodes are pitted, burned
or porcelain is cracked. Use only a TORCH K7RTC
or equivalent.
6. Install spark plug finger tighten and tighten an addi-
tional 3/8 to 1/2 turn using spark plug wrench.
Replacing Wheels
1. See Figure 4-17. Loosen locknut (A) with the
wheel on the ground using a 5/8” wrench.
Figure 4-17. Wheel Replacement
2. Use a suitable lifting device and raise the machine
to allow wheel removal.
3. Remove the locknut and slide the wheel off.
4. Replace the wheel and finger tighten the locknut
before lowering the machine.
5. Tighten the locknut with the wheel on the ground.
(000135)
CAUTION
Engine damage. Verify proper type and quantity of
engine oil prior to starting engine. Failure to do so
could result in engine damage.
(000210)
WARNING
Skin irritation. Avoid prolonged or repeated contact with
used motor oil. Used motor oil has been shown to cause
skin cancer in laboratory animals. Thoroughly wash
exposed areas with soap and water.
005958
A
B
A
000211
005987
A

16 Owner’s Manual for Trimmer/Mower™
Maintenance and Troubleshooting
Troubleshooting
Symptom Possible Cause
Engine will not start manually.
Refer to the engine owner’s
manual for engine-specific
procedures.
Verify throttle lever is in RUN position
Verify throttle cable is attached to engine and moves freely.
Air filter may be dirty. Change as necessary.
Replace spark plug(s) if dirty or cracked. If spark plug(s) is oily, leave it out, hold
a rag over the plug hole(s) and crank the engine several times to blow out any oil
in the cylinders. Wipe off plug(s) and reinsert.
Fuel may be old. Change as necessary.
Contact Generac Customer Service at 1-888-436-3722, or www.generac.com.
Engine smokes
Check engine oil level.
Verify machine is not on a steep incline.
Air filter may be dirty. Change as necessary.
Verify oil type. Engine may smoke if oil is too light for temperature.
Inspect cooling fins. Clean as necessary.
Contact Generac Customer Service at 1-888-436-3722, or www.generac.com.
Recoil will not pull out or is
difficult to pull
Check engine oil level.
Check for oil compression lock. Remove the spark plug, hold a rag over spark
plug hole, and pull recoil cord several times to blow out any oil in the cylinder.
Try to turn engine pulley by hand and with spark plug removed. If engine pulley
turns the recoil is broken or jammed.