Sportsman GEN3500i User manual

1"
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GEN3500 i
3,000 MAX WATTS INVERTER GENERATOR
INSTRUCTION MANUAL
READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS
PRODUCT.
This manual provides important information on proper operation & maintenance. Every effort has been
made to ensure the accuracy of this manual. These instructions are not meant to cover every possible
condition and situation that may occur. We reserve the right to change this product at any time without
prior notice.
IF THERE IS ANY QUESTION ABOUT A CONDITION BEING SAFE OR UNSAFE,
DO NOT OPERATE THIS PRODUCT!
DO NOT RETURN THIS GENERATOR TO THE RETAILER!
If you experience a problem, have questions or need parts for this product, call Customer Service at
1-866-460-9436, Monday-Friday, 8 AM - 4 PM Central Time. A copy of the sales receipt is required.
FOR CONSUMER USE ONLY – NOT FOR PROFESSIONAL USE.
KEEP THIS MANUAL, SALES RECEIPT & APPLICABLE WARRANTY FOR
FUTURE REFERENCE.
CALIFORNIA PROPOSITION 65
WARNING: This product, or the exhaust from this generator, may contain chemicals, including lead,
known to the State of California to cause cancer and birth defects or other reproductive harm. Wash
hands after handling.
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2"
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2 YEAR LIMITED EMISSION-RELATED WARRANTY
THIS ENGINE MEETS U.S. EPA EMISSION STANDARDS UNDER 40 CFR 1054.625 .The emission-
related limited warranty is valid for two (2) years. Keep the purchase receipt and mail in the product
registration card for proof of purchase. Buffalo Corp limits emission-related warranty repairs to authorized
service centers for owners located within 100 miles of an authorized service center. For owners located
more than 100 miles from an authorized service center, Buffalo Corp will, in its sole discretion, either pay for
shipping costs to and from an authorized service center, provide for a service technician to come to the
owner to make the warranty repair, or pay for the repair to be made at a local non-authorized service center.
The provisions of this paragraph apply only for the contiguous states, excluding the states with high-altitude
areas identified in 40 CFR part 1068, Appendix III.
To exercise this warranty, DO NOT RETURN TO RETAILER. Instead, call Customer Service toll free at 1-
866-460-9436 (email address [e-mail]) and you will be instructed on where to take the
engine for warranty service. Take the generator and proof of purchase (your receipt) to the repair facility
recommended by the Customer Service Representative. The warranty does not extend to generators
damaged or affected by fuel contamination, accidents, neglect, misuse, unauthorized alterations, use in an
application for which the product was not designed and any other modifications or abuse.
1 YEAR LIMITED WARRANTY (30 Day Limited Warranty for Commercial and Rental Purpose)
Generators are warranted to be free from defects in materials and workmanship for a period of 1 YEAR
from date of original purchase. Buffalo Corp. is not liable for any indirect, incidental or consequential
damages from the sale or use of this product. Any implied warranties are limited to 1 YEAR as stated, or as
otherwise stated, in this written limited warranty. Some states do not allow the exclusion or limitation of
incidental or consequential damages. Some states do not allow limitation on the length of an implied
warranty. Buffalo Corp will repair or replace, at its discretion, any part that is proven to be defective in
materials or workmanship under normal use during the 1 YEAR warranty period. Warranty repairs or
replacements will be made without charge for parts or labor. Parts replaced during warranty repairs will be
considered as part of the original product and will have the same warranty period as the original product.
This warranty gives you specific legal rights, and you may have other rights that vary state to state.

3"
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Notice Regarding Emissions:
Engines certified to comply with California and U.S. EPA emission
regulations for SORE (Small Off Road Equipment) are certified to operate
on regular unleaded gasoline and may include the following emission
control systems: Three-Way Catalyst (TWC) (if equipped), and Engine
Modifications (EM).
Legal Requirements:
Federal and/or State Occupational Safety and Health Administration
(OSHA) regulations, local codes, and/or ordinances may apply to the
intended use of this generator. Consult a qualified electrician, electrical
inspector, and/or the local agency having jurisdiction. Some areas require
generators to be registered with local utility companies. Additional
regulations may apply if this generator will be used at a construction site.
IMPORTANT SAFETY INSTRUCTIONS
STOP!
Before using this generator and if you have any questions regarding the hazard and
safety notices listed in this manual and/or on this generator, call 1-866-460-9436,
Monday - Friday, 8 AM - 4 PM Central Time.
Carbon Monoxide Gas: When in operation, the exhaust from this generator
contains poisonous carbon monoxide gas. Carbon monoxide gas is both odorless and
colorless AND may be present even if you do not see or smell gas. Breathing this
poison gas can lead to headaches, dizziness, drowsiness, loss of consciousness and
eventually death.
• USE THIS GENERATOR ONLY OUTDOORS IN NON-CONFINED
AREAS. DO NOT SECURE THE GENERATOR WITH A CHAIN OR ROPE,
AS THIS WILL MAKE IT DIFFICULT TO MOVE IN AN EMERGENCY.
• Keep at least several feet of clearance on all sides to allow proper
ventilation for this generator.

4"
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Chemicals: According to the State of California, the exhaust from this generator
contains chemicals known to cause cancer, birth defects, or other reproductive harm.
Flammable Gasoline: This generator may emit highly flammable and explosive
gasoline vapors, which can cause severe burns or even death. A nearby open flame
can lead to an explosion even if not directly in contact with gasoline.
• Do not operate this generator near open flame.
• Do not smoke near this generator.
• Always operate this generator on a firm, level surface.
Gasoline is highly flammable and explosive. Handling fuel can result in serious injury
or burns.
• Always shut down this generator before refueling. Refuel in a well-
ventilated area. Keep heat, sparks and flame away while refueling and away
from the location where gasoline is stored. Never refuel indoors where
gasoline fumes may reach flames and/or sparks.
• Allow this generator to cool for at least 2 minutes before removing the fuel
tank cap. Loosen the cap slowly to relieve pressure in the fuel tank. Avoid
spilling fuel.
• Do not fill the fuel tank above the upper limit line. Gasoline may expand
during operation. Do not fill to the top of the tank.
• Always check for spilled gasoline and immediately wipe it up before
starting this generator.
• Empty the fuel tank before storing or transporting this generator.
• Always handle fuel outdoors.
• Before transporting, turn the fuel valve to the “OFF” position and
disconnect the spark plug.

5"
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NOTE: DO NOT USE GASOLINE CONTAINING MORE THAN 10%
ETHANOL (e10)
Usage: Consult a physician(s) before using this generator if using a pacemaker.
Electromagnetic fields in close proximity to a heart pacemaker could cause a pacemaker to
malfunction or fail. Caution is necessary when near the engine’s recoil starter.
Usage: Prolonged exposure to high noise levels can be hazardous to hearing. Always
wear ANSI-approved hearing protection when operating or working around the generator
when it is running.
Powerful Voltage: This generator produces powerful voltage, which can result in
electrocution.
• ALWAYS ground this generator before using it. (See “Ground the
Generator” section in this manual).
• Only electrical devices should be plugged into this generator, either directly
or with an extension cord. NEVER connect a building electrical system to
this generator without a qualified electrician. Doing so voids your warranty.
Such connections must isolate generator power from utility power and
comply with local electrical laws and codes. Failure to comply can create a
back feed into utility lines creating an electrocution hazard, which may result
in serious injury or death to utility workers. Such a back feed may cause this
generator to explode, burn and create fires when utility power is restored.
• Use a ground fault circuit interrupter (GFCI) in highly conductive areas
such as metal decking or steel work. GFCIs are available in-line with some
extension cords.
• Do not use this generator in wet conditions (rain, snow, active sprinkler
system, wet hands, etc.). Always keep this generator dry and operate it with
dry hands.
• Do not allow children or non-qualified persons to operate this generator.

6"
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High Temperatures: This generator produces heat when in operation.
Temperatures near the exhaust can exceed 150 Degrees Fahrenheit (65 Degrees
Celsius).
• Do not touch hot surfaces. Observe all warning placards on this generator
denoting hot surfaces.
• Allow this generator to cool for several minutes after use before touching
the engine, muffler or other areas that are hot during operation and before
storing indoors.
• Hot exhaust may ignite some materials. Keep flammable materials away
from this generator.
• Keep at least several feet of clearance on all sides of this generator during
operation. Do not enclose this generator in any structure.

7"
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Usage: Misuse of this generator can damage it or shorten its life.
• Use this generator only for its intended purpose.
• Operate this generator only on a dry, level surface. Do not secure the
generator with a chain or rope, which would prevent it from being moved in
an emergency.
• Allow this generator to run for several minutes before connecting any
electrical devices.
• Promptly turn off any malfunctioning devices and disconnect them.
• Do not operate an excessive number of electrical devices in excess of the
wattage capacity of this generator.
• Do not turn on electrical devices until after they are connected to this
generator.
• Turn off all connected electrical devices before stopping this generator.
Usage: Prolonged exposure to high noise levels can be hazardous to hearing. Always
wear ANSI-approved hearing protection when operating or working around the generator
when it is running.
Usage: Avoid the use of extension cords if possible. If you choose to use them, be
sure they are sized adequately to handle the flow of electricity. An undersized cord
can overheat, short out and cause a fire.
Included with this Generator:
DC connector wires for connecting 12 Volt automotive-type batteries
Spark plug wrench
Screwdriver

8"
"
Usage: Avoid the use of extension cords if possible. If you choose to use them, be
sure they are sized adequately to handle the flow of electricity. An undersized cord can
overheat, short out and cause a fire.

9"
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DC connector wires
for connecting 12 Volt
automotive-type
batteries, Spark Plug
wrench and
Screwdriver
FEATURES:
•1.7 Gallon Fuel Tank •3,000 Watts Max AC output •5,000 RPM
•149cc, 4 stroke •Low oil shutdown •Recoil Start
•Run Time : 5 Hours at 50% load •Noise Level : 63db at 0% load @23 Ft
(1) Fuel tank
(2) Fuel tank cap
(3) Fuel filter
(4) Carrying handle
(5) Muffler
(6) Spark plug
(7) Choke lever
(8) Recoil starter
(9) Fuel cock
(10) Brake lever
(11) Wheel
(12) Oil filler cap
(13) Air filter
(14) Fuel primer
(15) Economy control switch
(16) Engine switch
(17) Oil warning light
(18) Overload indicator light
(19) Output indicator
(20) DC protector reset
(21) 12 Volt DC Outlet
(22) 120V RV Outlet
(23) Ground terminal
(24) AC 120V receptacle
(25) AC 120V receptacle
(26) AC protector reset
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17
18
19
21
22
23
24
25
20
26

10"
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This"is a Gasoline Powered Invertor Generator"that"offers"clean"power"for"electronics.
1）ENGINE SWITCH
The engine switch controls the ignition system.
To Start generator, turn ignition switch ON. Then the
engine can be started by sliding Choke lever to CHOKE
then pull Recoil. Allow engine to run for a few seconds
then slide the Choke Lever to RUN.
To Stop generator, press ignition circuit to STOP. The engine will not run.
2）ECONOMY CONTROL SWITCH
When the economy control switch is turned “ON”, the economy control unit controls
the engine speed according to the connected load. The results are better fuel
connection and less noise. (Turn OFF when using less voltage.)
3）LOW OIL ALERT SENSOR
When the oil level falls below the acceptable level, the engine stops automatically.
Unless you refill with oil, the engine will not start again.
4) OVERLOAD INDICATOR LIGHT
The overload indicator light comes on when an overload of a connected electrical
device is detected, the inverter unit overheats, or the AC output voltage rises. The
electronic breaker will then activate, stopping power to the generation in order to
protect the generator and any connected electric devices. The output pilot light will
flicker GREEN, the overload indicator light will turn RED, & the engine will stop.
(a) Turn off any connected electric devices and stop the engine
(b) Reduce the total wattage of connected electric.
(c) Check for blockages in the cooling air inlet and the control unit & restart engine.
!The generator AC output automatically resets when the engine is stopped and
then restarted. The overload indicator light may come on for a few seconds at
first when using electric devices that require a large starting current, such as a
compressor or a submergible pump. However, this is not a malfunction.

11"
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5）DC CIRCUIT PROTECTOR
The DC circuit protector turns off automatically when the load exceeds the
generator rated output. Reduce the load to within specified generator rated output
if the DC circuit protector turns off.
6）FUEL COCK
The fuel cock is used to supply fuel from the tank to the carburetor.
Turn ON when getting ready to start the generator. Turn OFF
when finished using the generator.
CHECK ENGINE FUEL
!Make sure there is sufficient fuel in the tank.
!If fuel is low, refill with unleaded automotive gasoline.
!Be sure to use the fuel filter screen on the fuel filter neck.
!Recommended fuel: Unleaded gasoline.
!Fuel tank capacity: 1.7 Gallon (6.3 Liters)
!Do not refill tank while engine is running or hot."
!Close fuel cock before refueling with fuel."
!Be careful not to admit dust, dirt, water or other foreign objects into fuel.
!Do not fill above the top of the fuel filter or it may overflow when the fuel heats up later and
expands.
!Keep open flames away.

12"
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PRIMER"BUTTON"
CHECK ENGINE OIL
Remove side panel, then remove oil filler cap and check the engine oil level. Make sure the engine oil
is at the upper level of the oil filler hole. Add oil as necessary.
!WARNING: The generator has been shipped without engine oil. Fill with oil or it will not start."
!Do not tilt the generator when adding engine oil. This could result in overfilling and damage to
the engine
!If oil level is below the lower level line, refill with suitable oil to upper level line. Do not screw in
the oil filler cap when checking oil level.
!Oil SAE 10W30
!Oil capacity: 30.42 oz.
GROUND
Make sure to ground the generator.
OPERATION
STARTING THE ENGINE
!Before starting the engine, do not connect electric apparatus."
1. Turn the fuel cock lever to the “ON” position.
2. Turn the engine switch to the “ON” position.
3. Turn the choke lever to the “CHOKE” position.
4. PUMP the PRIMER button until the glass bowl is full.
5. Pull the recoil starter handle slowly until resistance is felt.
This is the “Compression” point. Return the handle to its original
position and pull swiftly. Do not fully pull out the rope. After starting, allow the
starter handle to return to its original position while still holding the handle.
Grasp the carrying handle firmly to prevent the generator from falling over when
pulling the recoil starter.
6. Warm up the engine without a load for a few minutes.
7. Turn the choke lever back to RUN position then plug in appliances.
""""""""""""""ON

13"
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USING ELECTRIC POWER
AC APPLICATION
(a) Turn off the switch(es) of the electrical appliance(s) before connecting to the
generator.
(b) Insert the plug(s) of the electrical appliance(s) into the receptacle.
!Be sure the electric apparatus is turned off before plugging in.
!Be sure the total load is within generator rated output.
!Be sure the socket load current is within socket rated current.
!The economy control switch must be turned to “OFF” when using electric
devices that require a large starting current, such as a compressor or a
submergible pump.
DC APPLICATION
This usage is applicable to 12V battery charging.
Be sure the economy control switch is turned off while charging the battery.
STOPPING THE ENGINE
1. Turn off the power switch of the electric apparatus & disconnect electric devices.
2. Turn the engine switch to “STOP” position.
3. Turn the fuel cock lever to “OFF”.
BRAKE LEVER!
This generator includes locking wheels with a brake lever to prevent
the generator from moving.
1) Brake lever is UP, wheels are unlocked.
2) Brake lever is DOWN, wheels are Locked.
1 (UP)
UNLOCKED
2 (DOWN)
LOCKED

14"
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PERIODIC MAINTENANCE
MAINTENANCE CHART
Regular maintenance is most important for the best performance and safe operation.
Item
Remarks
Pre-operation
check
(daily)
Initial
1months
or 20 Hr
Every
3months
or 50Hr
Every
6months
or100Hr
Every
12 months
or 300Hr
Spark Plug
Check condition adjust gap and clean.
Replace if necessary.
!
Engine Oil
Check oil level
!
Replace
!
!
Oil filter
Clean oil filter
!
Air Filter
Clean. Replace if necessary.
!
Fuel Filter
Clean fuel cock filter. Replace if
necessary
!
Choke
Check choke operation
!
Valve
Clearance
Check and adjust when engine is cold.
!
Fuel Line
Check fuel hose for crack or damage.
Replace if necessary.
!
Exhaust
System
Check for leakage. Retighten or
replace gasket if necessary
!
Check muffler screen.
Clean / replace if necessary.
!
Carburetor
Check choke operation
!

15"
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Cooling
system
Check fan damage.
!
Starting
system
Check recoil starter operation.
!
Idle speed
Check and adjust engine idle speed
!
Fittings /
Fasteners
Check all fittings and fasteners correct if
necessary.
!
Crankcase
breather
Check breather hose for cracks or
damage. Replace if necessary
!
Generator
Check the pilotlight comes on
!
ENGINE OIL REPLACEMENT
1. Place the machine on a level surface and warm up the engine for several
minutes. Then stop the engine and turn the fuel cock knob to “OFF”. Turn the
fuel tank cap air vent knob clockwise.
2. Loosen the screw and remove the cover.
3. Remove the oil filler cap
4. Place an oil pan under the engine.
Tilt the generator to drain the oil completely
5. Replace the generator on a level surface.
6. Add engine oil to the upper level.
7. Install the oil filler cap
8. Install the cover and tighten the screw
!Engine Oil SAE 10W30 Capacity: 30.43 oz.
"
UPPER
LEVEL

16"
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!Be sure no foreign material enters the crankcase.
!Do not tilt the generator when adding engine oil.
This could result in overfilling and damage to the
engine
!Clean the oil filter every other 100 hr.
WASHABLE AIR FILTER
Maintaining an air cleaner in proper condition is very
important. Dirt induced through improperly installed,
improperly serviced, or inadequate elements damages
and wears out engines. Keep the element always
clean.
1. Remove the cover.
2. Remove the air filter cover and element.
3. Wash the element in solvent and dry.
4. Oil the element and squeeze out excess oil. The
element should be wet but not dripping.
5. Insert the element into the air filter.
6. Install the cover.
The engine should never run without the Filter; excessive piston and/or cylinder
wear may result.
CLEANING AND ADJUSTING SPARK PLUG
1. Remove the cover.
2. Check for discoloration and remove the carbon.
3. Check the spark plug type and gap.
Standard Spark Plug: A7RTC
Spark Plug Gap: 0.6-0.7 mm (0.024-0.028 in)
4. Install the spark plug.
5. Install the cover
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"
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OIL FILTER
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"
Oil Drain

17"
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FUEL TANK FILTER
1. Remove the fuel tank cap and filter.
2. Clean the filter with solvent. If damaged, replace.
3. Wipe the filter and insert it.
Be sure the tank cap is tightened securely.
MUFFLER SCREEN
!The engine and muffler will be very hot after
the engine has been run.
!Avoid touching the engine and muffler while they are still hot with any part of
your body or clothing during inspection or repair.
1. Remove the cover.
2. Remove the muffler screen.
3. Use the flathead screw driver to pry the spark
arrester out from the muffler
4. Remove the carbon deposits on the muffler
screen and spark arrester using a wire brush.
5. Install the muffler screen.
6. Install the cover
TROUBLE SHOOTING
Engine won’t start
1. Fuel systems
No fuel supplied to combustion chamber.
!No fuel in tank….Supply fuel.
!Clogged fuel line….Clean fuel line.
!Clogged carburetor….Clean carburetor.
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"

18"
"
Engine oil system
Insufficient
!Oil level is low….Add engine oil.
Electrical systems
Poor spark
!Spark plug dirty with carbon or wet….Remove carbon or wipe spark plug dry.
!Faulty ignition system….Consult dealer.
Compression insufficient
!Worn out piston and cylinder….Consult dealer.
Generator won’t produce power
Safety device (AC) to “OFF” …Stop the engine, then restart.
Safety device (DC) to “OFF” …Press to reset the DC protector
STORAGE
Long term storage of your machine will require some preventive procedures to
guard against deterioration.
1）DRAIN THE FUEL
1. Remove the fuel tank cap, drain the fuel from the fuel tank
2. Remove the cover, drain fuel from the carburetor by loosening the drain screw.
2）ENGINE
1. Remove the spark plug, pour in about one tablespoon of SAE 10W30 motor oil
into the spark plug hole and reinstall the spark plug.
2. Use the recoil starter to turn the engine over several times (with ignition off).
3. Pull the recoil starter until you feel compression.

19"
"
4. Stop pulling.
5. Clean exterior of the generator and apply a rust inhibitor.
6. Store the generator in a dry, well-ventilated place, with the cover place over it.
7. The generator must remain in a vertical position.
MODEL
GEN3500i
GENERATOR
Type
Inverter Generator
AC Voltage
60Hz
120V
Max. Output
3.0kW
Rated Output
2.8kW
Power Factor
1.0
DC Output
12V /5.0A
ENGINE
Model
XY157F-1
Type
Air-cooled, 4 cycle, OHC, Gasoline Engine
Bore×Stroke mm×mm
57.4×57.8
Displacement
149cc
Max. Output
4.0KW /5000rpm
Fuel
Regular Automobile Gasoline
Fuel tank Capacity
1.7 Gallons (6.3 liters)
Rated Continuous Operation
5h（50% Load）

20"
"
Lubricating oil
SAE 10W30
Lubricating oil Capacity
30 oz
Starting System
Recoil Starter
Ignition system
C.D.I
Spark Plug: Type
A7RTC
DIMENSION
Net dimension L×W×H
614 x 341 x 506mm
Overall dimension L×W×H
640 x 360 x 525mm
Net Weight
33.5 Kg
Dry Weight
36.5Kg
!Specifications subject to change without prior notice.
• High Altitude Use: This generator is not recommended for high altitude use
above 3,000 feet.