STANLEY is a registered trademark of The Stanley Works or its affiliates and are used under license by GXi Outdoor Power LLC. 
No part of this publication can be printed or copied without written permission. 
5 of 16 Rev. 5/2010 
Models: G5000S & G8000S 
WARNINGS 
 
Failure to properly follow maintenance instructions and pre-
cautions can cause serious injuries or death.  Always follow 
the inspection and maintenance recommendations and 
schedules in this owner’s manual. 
 
Safety Precautions: 
Make sure the engine is off before you begin any maintenance 
or repairs. This will eliminate several potential hazards: 
•  Carbon monoxide poisoning from engine exhaust. 
Be sure there is adequate ventilation whenever you 
operate the engine. 
•  Burns from hot parts. 
Let the engine and exhaust system cool before touch-
ing. 
•  Injury from moving parts. 
Do not run the engine unless instructed to do so. 
 
In the State of California a spark arrestor is required by law.  
Other states may have similar laws.  Federal laws apply on all 
federal lands.  If you equip the muffler with a spark arrestor, it 
must be maintained in effective working order.  See page 11. 
 
Rapid retraction of the recoil starter cord can pull the 
starter cord back faster than you can let go.  When starting 
the engine, pull the cord slowly until resistance is felt then 
pull rapidly to avoid kickback
.   
AC Applications 
Before connecting an appliance or power cord to the generator: 
1.  Make sure that appliances are in good working order. 
Faulty appliances or power cords can create a potential for 
electrical shock. If an appliance begins to operate abnor-
mally, becomes sluggish or stops suddenly, turn it off imme-
diately.  
2.  Disconnect the appliance, and determine whether the prob-
lem is the appliance, or if the rated load capacity of the 
generator has been exceeded.  
3.  Make sure that the electrical rating of the tool or appliance 
does not exceed that of the generator. Never exceed the 
maximum power rating of the generator. Power levels be-
tween rated and maximum may be used for no more than 30 
minutes. 
 
Substantial overloading will open the circuit breaker. Ex-
ceeding the time limit for maximum power operation or 
slightly overloading the generator may not switch the circuit 
breaker or circuit protector OFF, but will shorten the service 
life of the generator. 
 
Limit operation requiring maximum power to 30 minutes.  For 
continuous operation (longer than 30 minutes), do not exceed 
80% of the rated power balanced equally on the A&B sides of 
the Alternator.  
Changing the speed of the generator by adjusting the governor can cause damage to the genera-
tor, devices attached to the generator, and may result in bodily injury.  Do not adjust or tamper 
with the engine speed setting. 
Product Specifications 
DANGER 
WARNING 
Generator G5000S G8000S 
Rated frequency  60 Hz  60 Hz 
Rated voltage  120V / 240V   120V / 240V 
Rated output power  5.0 kW (Max.)  8.0 kW (Max) 
AC output (Max.)  20.8A  33.3A 
Engine type  OHV 4-Stroke OHV 4-Stroke 
displacement  279 cc  401 cc 
Compression ratio  8.2:1  8.0:1 
Rated rotation speed  3600 RPM  3600 RPM 
Rated power  10 Hp  15 Hp 
Starting system  Recoil  Recoil and electric starter 
Rotation direction  Counter clockwise  Counter clockwise 
Fuel type  Unleaded gasoline  Unleaded gasoline 
Low oil shutdown  Yes  Yes 
Fuel tank size  12 gallons  12 gallons 
Oil type / Capacity  SAE 10W-30 0.9 quarts  SAE 10W-30 1.1 quarts 
Gross weight  207 lbs (94 kg)  235lbs (107kg) 
Battery  N/A  12 AH 12 VDC  
Integrated voltmeter  Yes  Yes 
DANGER