Generac Power Systems MEGA 2500 Owner'S Manual Download Page 6

ADD FUEL

DANGER! NEVER fill fuel tank indoors. NEVER

fill fuel tank when engine is running or hot. DO

NOT light a cigarette or smoke when filling the

fuel tank.

Use regular UNLEADED gasoline with the generator

engine.  Regular leaded gasoline may also be used if

UNLEADED is not available. 

CAUTION:  Do not overfill the fuel tank.  Always

allow room for fuel expansion.

IMPORTANT:  

It is important to prevent gum deposits

from forming in essential fuel system parts such as the

carburetor, fuel filter, fuel hose or tank during storage.

Also, experience indicates that alcohol-blended fuels

(called gasohol, ethanol or methanol) can attract mois-

ture which leads to separation and formation of acids

during storage. Acidic gas can damage the fuel system

of an engine while in storage. 
To avoid engine problems, the fuel system should be

emptied before storage of 30 days or longer. Drain the

gas tank, start the engine and let it run until the fuel lines

and carburetor are empty. Use fresh fuel next season.

See “Storage” Instructions on page 10 for additional

information.
Never use engine or carburetor cleaner products in the

fuel tank or permanent damage may occur.
• Clean area around fuel fill cap, remove cap.
• Add  “UNLEADED”  regular  gasoline,  slowly,  to  fuel

tank.

• Install fuel cap and wipe up any spilled gasoline.

OPERATING THE GENERATOR

CAUTION!  Never start, or stop, the engine gen-

erator  with  electrical  loads  connected  to  the

receptacles with the connected devices turned

ON.

STARTING THE ENGINE

• Disconnect 

all

electrical loads from the generator.

• Move engine CHOKE CONTROL LEVER to 

“RUN”

position.

• Move ON/OFF SWITCH to 

“ON” 

position.

• If engine is warm, close choke only part way or leave

it fully open. A warm engine needs less choking than

a cold engine.

• Grasp starter grip and pull slowly until you feel some

resistance.  Let rope return slowly.  Then pull cord out

with rapid full arm stroke. Let rope return slowly. Do

not let rope “snap back” against starter.

• If engine “hunts” or falters after starting, apply choke

until engine begins running smoothly. Then return the

choke  to  the  open  position.  If  engine  continues  to

hunt, you may need to have the carburetor adjusted.

See Engine Owner’s Manual.

Figure 5 — Choke Control Lever

GENER

A

C

Generac Mega 2500 Extended Life Generator

6

E x t e n d e d   L i f e   G e n e r a t o r

Choke Control Lever

Figure 6 — On/Off Switch

On/Off Switch

Summary of Contents for MEGA 2500

Page 1: ...vent of a utility power failure the fol lowing step must be taken Before connecting the generator to an electrical system open the main circuit breaker or main switch serving the system to isolate the...

Page 2: ...ce that might involve a hazard For that reason warnings in the Manual and warnings on tags or decals affixed to the unit are not all inclusive If you intend to handle operate or service the unit by a...

Page 3: ...rator with elec trical loads connected to receptacles with the connected devices turned ON Start the engine and let it stabilize before connecting electrical loads Dis connect all electrical loads bef...

Page 4: ...no special additives DO NOT USE SAE 10W 40 Select the oil s viscosity grade according to your expected operating temperature Although multi viscosity oils 5W30 10W30 etc improve starting in cold weat...

Page 5: ...IRCUIT BREAKER Protects the genera tor against electrical overload Breaker is push to reset type AIR CLEANER Filters intake air as it is drawn through the engine 5 5 H P ENGINE Provides the power need...

Page 6: ...buretor cleaner products in the fuel tank or permanent damage may occur Clean area around fuel fill cap remove cap Add UNLEADED regular gasoline slowly to fuel tank Install fuel cap and wipe up any sp...

Page 7: ...king around a battery Battery electrolyte fluid is an extremely caustic sulfuric acid solu tion that can cause severe burns Do not permit fluid contact with eyes skin clothing etc If Spill occurs flus...

Page 8: ...r for starting than for running This surge of power lasts for only a few seconds when starting such motors Be sure you allow for this high starting wattage when selecting electrical devices to connect...

Page 9: ...e cleanliness of the generator frequently and clean when dust dirt oil moisture or other foreign sub stances are visible on its exterior surface NOTE We DO NOT recommend using a garden hose to clean g...

Page 10: ...r a hot generator Let the unit cool for a sufficient time before placing a cover on the unit Placing a cover on the unit before generator is sufficiently cool could could start the cover on fire ENGIN...

Page 11: ...Connect wire to spark plug to spark plug 6 Bad spark plug 6 Replace spark plug 7 Water in gasoline 7 Drain gas tank fill with fresh fuel 8 Overchoking 8 Open choke fully and crank engine 9 Excessively...

Page 12: ...ELECTRICAL DATA Drawing No 99697 G E N E R A C Generac Mega 2500 Extended Life Generator 12 E x t e n d e d L i f e G e n e r a t o r...

Page 13: ...DED VIEW CONTROL PANEL ITEM PART NO QTY DESCRIPTION 1 99837 1 PANEL Control 2 66818 2 OUTLET 120V 15A 3 99887 1 CAPACITOR 12 5 MFD 4 90418 1 OUTLET 12V DC 5 84543 C 4 SCREW 3 5 x 18mm Lg Phillips Head...

Page 14: ...EXPLODED VIEW GENERATOR Generac Mega 2500 Extended Life Generator 14 E x t e n d e d L i f e G e n e r a t o r G E N E R A C Drawing No B1763...

Page 15: ...SHNUT 1 2 Dia 20 B1760 2 ASSEMBLY 10 Wheel Tire 21 86292 10 HHCS 10 16 x 3 4 Self Drill 22 52858 2 NUT M8 1 25 Locking 23 87841 2 MOUNT Vibration 24 39414 2 HHCS M8 1 0 x 35 ITEM PART NO QTY DESCRIPTI...

Page 16: ...e and does not apply to a generator set or engine or parts which have been subjected to improper or unauthorized installation misuse negligence accident overloading over speeding improper maintenance...

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