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My leaf blower doesn't start. Compression is good. Fuel is getting to the spark plug. It doesn't get spark, tested it with a screwdriver in the cap, held against the plug while pulling the rope. What causes that?

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The HT coil may be bad or disconnected. Please check. Unless it converts the low voltage to high voltage there would be no spark.

Posted on Oct 24, 2010


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1 Answer

Have poulan bvm200vs leaf blower,blower will not start.I'm getting gas and spark and have good compression but blower still will not start. What can I check ?

If the machine has good compression, a spark and good clean fuel getting to the plug then it could well be the ignition timing is out,it is possible the flywheel key has sheared this will require removing the flywheel to check.

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Poulan blower PPB430V will not start. New coil(set at 10) new carb kit. new plug. (plug wet when cranking) unhook kill switch, get good spark,check head bolts, Yet, Blower will not start,not even make an...

The plug gets wet and the unit has good spark? That only leaves you with two things....fuel and compression.
Dump it just be safe and mix up a batch of totally fresh fuel! You might even put a small amount of system cleaner into it to chase of water and remove gums and varnish too. Hey...if the rings are stuck it might even free them up! Kudos on checking the head bolts....they do often get loose and drop compression enough to prevent starting. Now that you have the head bolts ruled out check compression with a guage and see if you have 80-90 psi compression. Be safe and good luck!

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1 Answer

Got a craftsman leaf blower cranks up and runs fine for about 5 mins then starts losing rpms

ITs hard to diagnose these things over the internet, it could be so many things.
Is this a gradual loss of power? If so; Im sorry to say; that it sounds like its losing compression as it warms up. It is not cost effective to repair the unit.

If the loss of power is more sudden it could be a failing ignition module. Ive even seen spark plugs that quit working when they get hot.

To test this you will need a proper spark tester, laying the spark plug against the head will not provide an accurate assesment, and a can of carb cleaner. Run the unit with the air box cover and filter removed till it fails and immediately give a shot of carb cleaner in the carb and restart. If it starts right up it could be fuel related. IF it doesnt start right up then quickly test for spark. If no spark then its likely the ignition module. If it wont run on the extra fuel and it has spark then it has probably lost compression.

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Toro model 30941 fuel leaking thru air intake

Its likely the diaghrams in the carb are stiff and holding the needle open causing the unit to flood. Remove the spark plug and turn the unit upside down over a towel and pull the start rope a few times. This will help remove all the excess fuel from the crankcase. Once the crankcase has been purged of excess fuel perform a compression test and check for spark. If its over 90 psi and you have spark rebuild the carb with new diaghrams.

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My leaf blower won't start. I've checked, fuel, cleaned filters, and carbon build up. I realised spark plug isn't firing, so I replaced it but it's still not firing.

did you make sure the new spark plug was igniting if it is or if its weak you might have broke the flywheel key was it running fine when last used there can be alot of things it could be 2 cycle engines must have 120psi of compression ,the right fuel mixture,good plug right gap between flywheel & magnito (spark plug wire connect to to get spark) and not rust on flywheel & magnito hope this helps let me know thanks

Nov 10, 2009 | Garden

1 Answer

Ran great sat. but would not start sun. same gas changed plug air filter gas soaked with it off still not running tried putting gas in spark plug hole still not running this is a craftmans 2 cycle leaf...

Were you running a fuel mixture of 40:1(3.2 oz of 2 cycle oil to 1 gal of gas), that you mixed up before you started using it again. The unit may have had to much use on Saturday and may be burned up. Try to have a compression test done on the engine, needs to be at least 100 psi to run. If that proves to be good then you can start looking at Fresh gas mixture, a new spark plug, Carburetor rebuild or an ignition module.
Good Day.

Oct 26, 2009 | Garden

1 Answer

No fire

First things first; press the primer bulb 10 times, then pull the starter cord 4 times, then remove the spark plug and look at the electrode, is the electrode wet, black, sooty? If the electrode is wet, the cylinder is getting fuel. So, the next thing will be testing for spark; you can purchase a spark tester at just about any autoparts store or online from someone like Harbor Freight. To test for spark, the spark plug is left in the cylinder but the wire is taken off...the tester is inserted installed between the tip of the plug and the ignition module; this is very easy to see and, pull the starter cord and watch the light on the tester, if the light flickers with every pull, you have good spark. Now, we check compression; you can get a compression tester from any autoparts store, if you don't want to buy one, stores like AutoZone have a tool loaner program...remove the spark plug and then screw the plug end of the compression tester into the spark plug hole; pull the starter cord 4-5 times and look at the meter, if it reads anything below 90psi, there is an internal problem such as the piston ring is stuck.

Now, depending on all of these checks, you can pinpoint the most likely culprit. If the spark plug is wet, the spark tester light flickers and compression reading is good, try cleaning or changing the air filter first, if you still can't get it to run, try spraying a bit of carburetor cleaner in the carb to clean it and try again, if that doesn't work, try replacing the spark plug, if that doesn't work, you may have to get a rebuild kit for the carburetor. If the spark tester light does not flicker, you will need a new ignition module. If the compression reading is low, the motor needs a ring job.

I know this is a lot of information and it may sound daunting but if you follow these steps, you will get your blower running.

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2 Answers

I just picked up a used ryobi rgbv3100 mulcher vacum blower ,it had no gas in it i put the oil gas mix in it ,followed the instructions on the blower ,but cant get it to start ,any ideas on what i can do?

test for spark.
while spark plug is out - put finger over hole see how much compression there is.

If good spark - look for holes in fuel line.

Jul 06, 2009 | Ryobi Garden

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