Question about Craftsman Gas Mini - Tiller/Edger

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Mini-tiller stopped running, cleaned the spark arrestor, cleaned carb, checked spark plug, changed fuel. Sometimes it will start, run fast, then stop.

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Sounds like you will need to replace your carburetor internal rubber parts like the diaphgram and O rings.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to reassemble the carburetor or follow the instrucitons you get with the carburetor kit.
If the mower/weedeater is over a year old, then I also recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, you will first need to seat the jet screws.
But before you seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to seat them first and then turn them back out to their orginal position before you started.
This is a FREE answer,Please rate me

Posted on Oct 12, 2010

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Just stopped running, changed fuel tank,spark gapped at .025 , air filter, added new fuel still won't throttle up and is hard to start. What's next?


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1 Answer

If you lent your tiller to your "know it all"


While having your brother buy you a new tiller sounds good, it just might not be practical or posible. So drain the fuel from the tank, fuel lines and the carb., clean the spark plug and replace fuel filter if installed. Put the proper gas in and start it, should be good or clear up pretty quick. Hopefully it did not run with the wrong fuel for too long where the spark arrestor in the muffler would get clogged up.

Good luck.

If really helpful, please rate.

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I have a two cycles craftmans gas mini tiller and while i was using it the other day it just shut off and now it want start back


CHECK THE SCREEN ON OUTPUT OF THE MUFFLER. ITS CALLED A SPARK ARRESTOR, THESE GET OIL FOULED AND MAKE EM A BEAR TO RUN . CLEAN IT UP AND SHE WILL RUN LIKE A CHAMP, THE CARB MIGHT NEED REBUILDING ,FUEL FILTER AND A SPARK PLUG IS THE FIRST THING TO REPLACE .. IF'N I WAS ANY HELP VOTE FOR ME ...THANKS.. JAY

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1 Answer

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CHECK THE SCREEN ON OUTPUT OF THE MUFFLER. ITS CALLED A SPARK ARRESTOR, THESE GET OIL FOULED AND MAKE EM A BEAR TO RUN . CLEAN IT UP AND SHE WILL RUN LIKE A CHAMP, THE CARB MIGHT NEED REBUILDING ,FUEL FILTER AND A SPARK PLUG IS THE FIRST THING TO REPLACE .. IF'N I WAS ANY HELP VOTE FOR ME ...THANKS.. JAY

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1 Answer

Engine will start but wont run when throttle is applied


Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled
b) is there spark

2) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated
3) Check cylinder compression


Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

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1 Answer

Tiller won't stay running


Hmmmm.....it sounds like restricted fuel flow to me, but explain "rebuilt the carb" so I can get an idea on what you did.

Though it sounds right off like you whooped it good and got the basics.

Right off, go back through the "system", check the fuel flow, check that spark on the plug. Eyeball for any loose wires (E.G., Kill Switch, etc.) that are grounding (you never know!)

Stick to KISS on this one, since it ran before the carb got bad and got rebuilt, it will be one of those things you replaced, rebuilt, or changed. Sometimes, it is the SMALLEST thing......

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Check the exhaust side of the tiller. There are 3 screws on the muffler cover that need to be removed, then there is a cover on the spark arrestor that also has 3 screws to remove. Inside this is a small screen (the spark arrestor). Take it out and clean it with a good solvent (I use carb cleaner). This is the easiest and least expensive fix.

If this doesn't work you may need to rebuild the carb. I have found it is easier and costs about the same thing to just replace the complete carb.

The company will tell you to make sure you always run the carb dry before storage, but I have NEVER done that as I believe it dries out the gaskets. I just use STA-BIL gasoline stabilizer before I store it for the Winter and keep it setting level in storage.

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• Engine is so old the crankshaft seals have hardened with age. This is one reason no 2-stroke lasts longer than about 8 years. If the seals are shot, then it will cost more to fix than a new one costs. Time to toss it.

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