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Troubleshooting Guide-Engine

Problem

Possible Causes

Probable Solutions

Engine will not 
start

FUEL RELATED:

Improper gasoline/2 cycle oil mix.

1. 

No fuel in tank or fuel valve closed.

2. 

Choke not in start position, especially 

3. 

with cold engine.
Low quality or deteriorated, old 

4. 

gasoline.
Carburetor not primed. 

5. 

 

Dirty fuel passageways blocking fuel 

6. 

flo . 

Carburetor needle stuck. Fuel can be 

7. 

smelled in the air.
Too much fuel in chamber. This can be 

8. 

caused by a stuck carburetor needle.

FUEL RELATED:

Mix 50 parts unleaded gasoline with 1 

1. 

part 2-cycle oil.
Fill fuel tank and open fuel valve.

2. 

Move choke to start position if engine 

3. 

is cold.
Use only fresh 89+ octane unleaded 

4. 

gasoline and 2-cycle oil mixture.
Prime carburetor by pressing priming 

5. 

bulb specified number of times (if
equipped).
Clean out passageways using fuel 

6. 

additive.  Heavy deposits may require 
further cleaning.
Gently tap side of carburetor float

7. 

chamber with screwdriver handle.
Turn choke to run position.  Remove 

8. 

spark plug and pull the start handle 
several times to air out the chamber.  
Reinstall spark plug and set choke to 
start position.

IGNITION (SPARK) RELATED:

Spark plug wire not connected 

1. 

securely.
Spark plug electrode wet or dirty.

2. 

Incorrect spark plug gap.

3. 

Spark plug wire or spark plug broken.

4. 

Incorrect spark timing or faulty ignition 

5. 

system.

IGNITION (SPARK) RELATED:

Connect spark plug wire properly. 

1. 

Clean spark plug.

2. 

Correct spark plug gap.

3. 

Replace spark plug wire and/or spark 

4. 

plug.
Have qualified technician diagnose

5. 

repair ignition system.

COMPRESSION RELATED:

Cylinder not lubricated.  Problem after 

1. 

long storage periods. 

Loose or broken spark plug.  (Hissing 

2. 

noise will occur when trying to start.)

 

Loose cylinder head or damaged head 

3. 

gasket.  (Hissing noise will occur when 
trying to start.)
Engine valves or tappets misadjusted 

4. 

or stuck.

COMPRESSION RELATED:

Pour tablespoon of oil into spark plug 

1. 

hole.  Crank engine a few times and try 
to start again.
Tighten spark plug.  If that does not 

2. 

work, replace spark plug.  If problem 
persists, may have head gasket 
problem, see #3 below.
Tighten head.  If that does not remedy 

3. 

problem, replace head gasket.

Adjust valve clearance.  If that does not 

4. 

work, clean or replace valves/tappets.

Содержание 1250 XLT

Страница 1: ...ehold power supply 4 Do not smoke while refueling the generator Do not overflow the fuel when refueling the generator Stop the generator before refueling Gasoline is flammable and the sparks may cause it to ignite Keep the generator at least 3 feet away from flammable materials 5 Electrical equipment including any lines and plug connections should be insulated 6 The circuit breakers should be matc...

Страница 2: ...ator to a grounding rod not included The grounding rod must be an earth driven copper or brass rod electrode which can adequately ground the generator See Figure A PRE START CHECKS 1 Check to make sure the Engine Power Switch is in its OFF position See Figure C CAUTION Your Warranty is VOID if the Engine s Fuel Tank is not filled with the proper mixture 50 1 of unleaded gasoline and 2 cycle oil be...

Страница 3: ...rator must not exceed the rated maximum power of the unit 2 Always reduce the load if the AC Circuit Breaker turns off Once the load is reduced press the Breaker to reset the Generator and continue operation See Figure I 3 Allow the Engine to run at no load until warm approx 3 minutes after each start up to allow the Engine to stabilize 4 To fill the Fuel Tank first wipe off the Fuel Tank Cap and ...

Страница 4: ...N 2 Remove the Air Filter Element 3 Wash the Air Filter Element in warm water and mild detergent several times Rinse Squeeze out excess water and allow it to dry completely Soak the Filter in lightweight oil briefly then squeeze out the excess oil 4 Install the new Air Filter Element or the cleaned Filter Secure the Air Cleaner Cover before use 4 Plug the power cord of the 120 volt appliance tool ...

Страница 5: ... general guide If performance decreases or if the Engine operates unusually check systems immediately The maintenance needs of this Engine will differ depending on factors such as temperature air quality fuel quality and other factors Note These procedures are in addition to the regular checks and maintenance explained as part of the regular operation of the Engine After Initial 25 Operation Hours...

Страница 6: ... or first 20 hrs every 3 months or 50 hrs every 6 months or 100 hrs every year or 300 hrs As necessary Engine oil check level x Air cleaner check x Clean x fuel filter cup Clean x spark plug check clean x gas tank check gas level x Clean x Run generator premix gas out prior to long periods of storage ...

Страница 7: ...park plug and pull the start handle several times to air out the chamber Reinstall spark plug and set choke to start position IGNITION SPARK RELATED Spark plug wire not connected 1 securely Spark plug electrode wet or dirty 2 Incorrect spark plug gap 3 Spark plug wire or spark plug broken 4 Incorrect spark timing or faulty ignition 5 system IGNITION SPARK RELATED Connect spark plug wire properly 1...

Страница 8: ...replace fuel tank cap 2 Properly adjust idle speed 3 Have qualified technician diagnose and 4 service engine Engine knocks Old or low quality gasoline 1 Engine overloaded 2 Incorrect spark timing deposit buildup 3 worn engine or other mechanical problems Fill fuel tank with fresh 89 octane 1 unleaded gasoline and 2 cycle oil mixture Do not exceed equipment s load rating 2 Have qualified technician...

Страница 9: ...9 feedback natitools com 1 800 348 5004 Troubleshooting Guide Generator Unit ...

Страница 10: ...y or indirectly to misuse abuse negligence or accidents repairs or alterations or a lack of maintenance NAT shall in no event be liable for death injuries to persons or property or for incidental special or consequential damages arising from the use of our products To receive service under warranty the original manufacturer part must be returned for examination by an authorized service center Ship...

Страница 11: ...8807517 12 12 1250 XLT GENERATOR Model 51769 m For customer service call 1 800 348 5004 or email 11 feedback natitools co Parts List ...

Страница 12: ...sher 4 62 Piston 1 17 Flat washer 4 63 Piston pin fender ring 2 18 Seal ring 1 64 Cylinder seal cushion 1 19 Bolt 3x8 2 65 Piston ring 1 20 Adjustable speed fork 1 66 Cylinder block 1 21 Adjustable speed lever 1 67 Cylinder head gasket 1 22 Bolt 6x40 1 68 Cylinder head 1 23 Seal ring 1 69 Sparkle plug 1 24 Press spring 1 70 Flange bolt 6x100 2 25 Adjustable speed piece 1 71 Double head bolt 6x113 ...

Страница 13: ...120V 8807517 12 12 m 13 feedback natitools co Wire Diagram ...

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