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My pgo t rex 125cc wont start, has gas, clean air filter,new s/plug,new battery,dont get spark when i remove plug wire +hold near earth, help pleae

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kschlumberge

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Motors need three things to run. Fuel, Oxygen, and Ignition (spark).
If you leave motorcycles set for a long time, the gas in the carburetor will turn to lacquer. If that is the case no fuel will get to the spark plug. Spraying starting fluid in the air cleaner or carb can prove this, and it will start and run for a couple seconds then die.
If you can smell gas, you have either no spark or it may be flooded. If you don't have spark, find out if there is a blown fuse, or a shorted wire.

Posted on Feb 28, 2015

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1 Answer

Hi i have a 4stroke 125cc pit bike it wont start tried bump start sorted turned over but when i reved it didnt respond then died any ideas


Tryd go to auto shop and check the carburator of your motor and clean your air filter adjust air setting in carburator and put a new fuel pump check fuel setting in carburator

Jan 18, 2014 | Motorcycles

1 Answer

Hi I did a tune up ,changed and checked every thing I done ..too I changed the oil ,oil filter ,gas filter air filter ,got a new battery changed the plugs there new too...even a new belt new key ...but...


Spark and gas??? Must have both. Pull spark plug wire and check for spark. If you have spark, check gap on spark plug. Check the bowl on carburetor. loosen bowl screw to see if gas is coming out. If you have gas coming out, carb needs to be taken off and cleaned or rebuilt.

Oct 11, 2013 | Cub Cadet Street Sign- tractor lawn riding...

1 Answer

Helpme!


Check for spark at spark plugs then check fuel and fuel filter .

Troubleshooting a small Petrol engine that won't start requires a series of short tests and the process of elimination.
Understanding the principles of how a small engine operates is helpful but not necessary.
Proper disposal of hazardous liquids will be required.
The knowledge gained in the performance of this procedure can be applied to many different types and sizes of internal combustion engines.
The average weekend mechanic can complete the process in about an hour.
Put on the safety glasses.
Remove the gas cap and check that there is gas in the fuel tank.
Look at the inline gas cutoff valve located below the gas tank on the fuel line and make sure it is in the on position, with the knob turned straight in line with the fuel line.
Look at the spark plug and check that the wire is securely plugged onto the plug.
Try to turn the spark plug by hand and make sure it is screwed firmly into the hole.
Look at the ground strap by the spark plug and make sure it is not touching the spark plug.
Look at the kill switch located by the controls and make sure it is in the run position.


Remove the air filter by unsnapping its box-like cover or removing the wing nut that holds it onto the carburetor.
Lift the air filter out of the holder and set it aside.
Spray a shot of starting fluid from the aerosol can into the empty air filter area of the carburetor and try to start the engine.
Let the engine run about 30 seconds or until it dies.

Eliminate the electrical system as the cause of the problem if the engine started right up, ran a few moments, and quit.
Remove the gas line from the carburetor by loosening its hose clamp with the screwdriver kit.
Hold the fuel line over the clear glass container and let some gas run into it.
Look at the gas, checking for water and impurities.

Drain the gas tank if the gas looked impure.
Remove the gas filter from the fuel line by loosening its hose clamps with the screwdriver kit.
Replace the gas filter with a new one if the gas did not run into the glass at a rapid pace.
Reinstall the gas line and gas filter.
Fill the gas tank with new gas.

Find a small drain bolt located on the very bottom middle of the carburetor.
Place a small container that gas won't melt under it and remove it with the wrench kit.
Let the old gas drain out of the bottom until the new gas starts to flow out. Screw the drain bolt back into the bottom of the carburetor.

Clean up any spilled gas off the motor and elsewhere with the shop rag.
Place the rag in the metal bucket a safe distance from the work area.
Clean the air filter with warm, soapy water if it is the spongy type, or replace it with a new one.
Install the air filter. Start the engine.

Unplug the spark plug wire from the spark plug if the engine did not start.
Hold the insulated part of the spark plug wire with one hand and place the bare part about 1/4 inch away from the top of the spark plug.

Try to start the engine and watch for a spark between the wire and the plug. Replace the spark plug wire with a new one if it shocked you through the insulation.
Remove the spark plug using the spark plug wrench and replace it with a new one if there was a spark.
Try to start the engine. Let the engine run until it performs smoothly.

Do not do anything else if there was no spark, as the trouble is inside the internal workings of the engine and requires professional repair and tools.
http://www.popularmechanics.com/cars/how-to/maintenance/1272351?click=main_sr

Jul 11, 2013 | ATVs

1 Answer

I have a 1998 dodge avenger se 6 cyl,, an it wont start its not the battery or the Fuel Pump not the Starter it just dont have any spark it acts like its out of gas but has a haf tank all looks good an...


when you turn on key, do you hear the fuel pump run for a couple of seconds ? check fuses, & fuel pump relay,(it has a fuse also). fuel pump cannot be ruled out. next, your coil provides spark to plug wires, with an assistant, in drivers seat, pull off a spark plug wire from a spark plug, use a paper clip, insert into end of wire, with the helper turnning the key to crank engine, hold the wire w/clip about an 1/8 " from clean metal, to see if a spark occurs, wear gloves, or you may get jolted, if you know what I mean. if no spark, replace coil, I would replace plug wires also. remove spark plugs , if worn, replace. just do it !!! you need spark correct ? well then ! whens the last time you replaced fuel filter ? do it ! a new air filter will help also. air, fuel, spark all work together. go to parts store, if you can, see if they can pull any trouble codes . if you can't do the work mentioned above, it just might be your problem . now get to work , make it happen !!!!

Feb 17, 2013 | 1996 Dodge Avenger

2 Answers

Won't start!!!! Can u help trouble shoot to fix please


Hi there check you are getting a spark from the cap to the plug.Do this by removing the cap and holding it very close to the top of the spark plug then try starting it.You should see a spark jump across.
If that seems ok take out the plug and either give a clean with some wire wool gently or replace it if it looks old or is old!
Hope this helps ;o)
Regards
Roy

Jan 31, 2013 | Garden

1 Answer

My mtd 3 hp edger wont start ,


does it have spark remove the plug hold nit near the head and pull the rope is there spark?

Apr 26, 2012 | Garden

1 Answer

I have a 1979 yamaha enduro 125cc i cant get it to start... i ran when i first got it and then it just died and i havn't been able to get it started... i changed the spark plugs cleaned the gas tank...


Did you squirt some gas in the cylinder to see if it would fire? Check the spark by laying the spark plug on the head, or holding it there with rubber handles, attached to the plug wire, see if you get a spark, if that checks out, you have spark, open up the air filter and peek in the carb, twist the throttle to see if gas comes shooting out. If not, squirt a little gas in the carb, try it, fire? check the fuel filter, pump, carbs could be gummed up. Did you get the jets clean? Run a wire through them to see if they are clear? Blow through them to check. Check it out.

Jun 23, 2010 | Motorcycles

1 Answer

WONT START


Not so many reasons she won't start. 4-Strokes are Simple!

Here they are:

Motor:
Fuel Tank-> Fuel Line-> Fuel Filter-> Carb-> Intake (Valve)-> Piston-> Exhaust (Valve)-> Muffler

Carb (Old Style):
Fuel Side:
Fuel Bowl-> Float-> Needle Seat-> Fuel Ports (Venturi)
Air Side:
Air Filter-> Carb Air Intake-> Butterflies (2)
(Clean 'em ALL!)

Hardware (Motor):
Rotor (Magnets)-> Magneto (Ignition Coil)-> Spark Plug Wire-> Spark Plug-> Cylinder Head (Spark Plug Ground)

Ignition:
Kill Switches (Seat, Clutch, etc.)-> Spark Plug/Ignition Coil-> Ground
Key Ignition-> Battery->Starter/Generator

If one of those fail.......= Non-Starting 4-Stroke!

Fixes-
Fuel:
You are either getting too much, or too little. Too much = Carb.
Too little = Carb. Therefore, tear down the Carb (COMPLETELY-Careful!) and clean it up.

Electrical:
Grounding out the System (Kill Switches)
Battery-> Ignition-> Starter.
Magneto->Plug Wire->Plug (Check 'em all!)


May 28, 2009 | Mtd Garden

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