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Wont start was mowing the grass and turned off. when you pull the cord its like it wants to start but wont. spark plug is good just put new gas . Bolens 4.5hp/190cc

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Check the vent hole on the gas cap. If it is sputtering it is fuel related. If it is not trying to fire at all check the spark. New plugs can fail and there is a key on the flywheel that acts like a fuse and kills the spark if something hard is hit by the blade.
Eric

Posted on May 28, 2010

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The shear key may be compromised or the air filter is clogged shut. if you hit something with the mower (it doesn't take much) the shear key may get distorted which changes the timing enough to make it hard or impossible to start, it can drive you crazy but a .79 part will ruin you whole weekend.

Posted on May 27, 2010

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Following fuel leaking through the air filter and exhaust and checking the float bowel & putting the carb back I cannot engage the cord. The break is deploying and was working prior to the fuelleakage


remove spark plug and try it if gas blows out you have a carb problem rather sounds like the fuel has leaked and filled the cylinder . means float is sticking in the carb .

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Lawnmower just stop during mowing the grass. Spark plug is good. There is gas and I just put oil. What do I do?


Are you sure your getting spark? did the plug wire come apart inside the boot? There are a lot of places to go from your question.

Feb 25, 2015 | Garden

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Suddenly cut out whilst mowing the lawn. now wont start, pull cord stiff to pull


Something just like this happened earlier this year with my pressure washer. This is what I did to fix it and now it runs great. Check the oil. If it's black or feels the least bit tacky, drain a pint or two of the oil out and re-add that amount of Marvel Mystery Oil. Now, attempt to pull the cord all the way out, but slowly at first. It should get easier to pull after about 5 pulls. If the mower restarts, let it run for 10 minutes until the Mystery Oil is hot and has cycled around inside the engine. Then drain that oil and refill it with a quality brand of oil. To top it off, either clean or replace the air filter, and put a shotglass of Lucas gas & injector cleaner into the mower's full gas tank. I also do this to my lawnmower and weedeater. It works wonders. BTW...If you're unable to turn the engine over by pulling the cord, remove the spark plug and tilt the mower up, so you can turn the blade easily by hand (use gloves). BUT FIRST MAKE SURE THAT SPARK PLUG IS REMOVED. REMEMBER... SAFETY FIRST! Let us know if this helped you any.

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Motor mower wont start


By tipping a 4 cycle motor on a lawn mower or any equipment, you have all the oil and gas running into the combustion chamber and sometimes the oil and WATER will get into the tank. It will need too have the spark plug removed, the engine turned over with the starter to blow the oill, gas, and water out of the cylinder(s), the plug should be either dried and gap reset, and the gas tank drained and FRESH gas put in it. Replace the spark plug prime with just a few drops of gasoline in the carburetor throat and restart and let run to dry evrything. NOTE: An oil change is recommended, too!!

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Lawn mowers


Maybe it need a spark plug

May 08, 2013 | Garden

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My 5700 watt 11 HP McCullough generator wont start. I'm getting good gas to the plug but no spark.


The spark coil is bad if you have no spark

Small engine repair. Part is expensive.

Have you checked spark for sure?
1) Spray WD-40 directly into carburetor
If machine has spark, it will fire
2) Is exhaust port clogged with carbon and dirt?
3) Get new spark plug
Pull out old spark plug
Put spark wire on plug
Hold spark plug wire with fingers
Put spark plug threads against metal opening where spark plug came out.
Metal to metal
Pull cord or push starter
Look for spark between metal

No spark, then spark coil is bad.

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Kia ora, i have a makita 2 stroke grass cutter, that just wont start, checked, spark plug, fuel, took it apart and cleaned it..still wont start. Please help, it does not have model number only product...


Engines need 4 things: Spark, compression, fuel, exhaust

1) Does spark plug have spark?
Take out plug, put plug wire back on plug, hold plug threads against metal part of engine, pull cord, do you see spark between plug and engine?

2) While spark plug is out, put finger over hole and pull cord. Do you feel suction that shows compression?

3) What about the exhaust port? Is the screen blocked with carbon deposits and dirt? Soak it in WD-40.

4) Do you have 2-cycle oil in gasoline? Do you have fresh gas? Did you leave gasoline in tank for several months? Is the carburetor clogged with gum?

5) What about the air filter? Does it fire up without air filter? Will it fire if you spray WD-40 into carburetor? Can you keep it going while spraying WD-40 into carburetor?
If it fires with WD-40 but won't keep going on it's own, then the gas is not getting to carburetor or carburetor is clogged with gum.

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1 Answer

Oil causing a problem?


Sound as if you have too much oil in the machine. Anytime you see white or lite gray smoke it is a sign of too much oil. Before you go through the routine of cleaning the oil out of every nook and cranny, try unscrewing the spark plug and clean it with a soft rag. It would have oil on it preventing the machine from starting. If this does work and there isn't a lot of oil in the gas tank now, just continue running the engine until the smoke clears. It won't hurt anything. But if cleaning the plug doesn't help you will have to empty all gas and oil from the gas tank, refill with new gas, squirt a little gum out carb cleaner in your carb to remove any oil there (this can be done when you try to restart the engine). Remember, when you are mowing grass if you are mowing on a hill) of any knd, make sure to turn the mower so the gas tank is on a higher level than the oil.

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1 Answer

Lawnboy 10301 won't start


you need spark, gas and timing to make it run. have you checked spark? sounds like you are getting gas. did you hit anything hard with the blade while mowing? this can throw it out of time.

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