Question about Poulan/Weed Eater No. Bvm200le 711482 24cc Gas Blower/Vac
I have a Poulan PBV200LE leaf blower with running and starting issues. It is 2-3 years old, used sparingly in the Fall (a total of 10-15 hrs). It ran fine until recently when it would stumble while running and then stop. Finally it got to the point where it would not start.
I have replaced the spark plug and fuel filter. I cleaned the air filter. I tried a fresh mix. Then I took it apart. I get a spark - checked by grounding the plug and observing the spark at the plug tip. I checked the compression with the finger test and can feel the air pressure when pulling it. Just for giggles I checked the cylinder to crankcase screws - seemed tight. Also, the spark plug is wet with fuel.
So, it appears I have fuel, spark and compression.
What's left? Help!
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Posted on Jan 02, 2017
Ok. Good job on doing what you could, right off! The simplest things are the most overlooked, and the most unforgiving.
So, you know your plug is wet, so you got some fuel flow.
Now let's figure out the plug no-fire problem. (This is under the assumption you haven't beat on this blower with a sledge-hammer at one point. The whole "key-way" is fried thing.)
1. Grab ahold of that plug THEN crank away. One time will tell you yes or no on spark. No, I am not joking, and yes, it is better than staring at the end of a plug and wondering if your eyes are bad.
In fact, better than a cup of coffee......in a bad way.
2. Check your kill switch. It is either: Grounding, or Open (open like it should be, UNTIL you push it, click it, or slide it, whatever you got). One CHEAP and fast way: Unhook the kill switch.
Then crank away. No spark? Not the kill switch then!
3. Check your spark plug GROUND. Let's say you got some shocking results from grabbing onto that bad boy. NOW check where the plug meets the cylinder head when she is screwed down in there. Believe it or not.....if it is funky, she won't ground right!
Hence, no worky.
4. You got no spark at all.....STILL. Let's look over your Spark Plug WIRE. Is she wore through? Is SHE grounding out? Has she heat failed? Then do #5.
5. STILL no spark. Let's check the last 2 things......
Rotor Magnets, and Magneto (ignition coil).
IF you have a volt/multi-meter, hook her up to the plug wire. No juice = Bad Magneto, or Bad Plug Wire. SOME juice = Good Magneto, but Bad Plug Wire (in some mowers/weedeaters, etc., remember that the Magneto is where the kill switch hooks too.
See if it is somehow grounding you out, by being loose but still touching the cylinder, etc.)
6. Failing Magneto. This can happen, and it does. You get SOME juice, just not ENOUGH juice. 2-Strokes make a lot of heat, even Magneto's give up the ghost after a while, sometimes. In this case, find a replacement!
Posted on May 30, 2009
Alright, remember that 2-Stroke motors are meant to do 2 things:
Break down, then Frustrate you.
So, here we go: (Electrical)
Rotor Magnets, Magneto (ignition coil), Spark Plug Wire, Spark Plug, Spark Plug Ground (Cylinder Head).
In that order!
Check your "fire" from the Magneto:
1. Check your Kill Switch. In other words, leave everything normal, and unhook it. Did she start? Kill Switch it is! Kill Switch/Wire comes from the Magneto (single wire/ground) to the Switch itself. So check that wire AT the Magneto (Is it loose and grounding out? Is the Kill Switch grounding you out where it is, because of crud, junk, or because it is touching the block when it is not supposed to?)
2. Check your Spark Plug Wire. Easy, unook it from the plug, stick your finger in, give it a crank (non-MultiMeter way). Did you get shocked? Then it ain't your Plug Wire and Magneto!
With a Multi-/Volt Meter, simply hook her up, and check for juice WHEN you pull the rope. If you got juice, it ain't your Plug Wire or Magneto!
Checking Spark the "normal" way: Grab the Plug with a pair of insulated pliers, hold the plug end against the cylinder head, and pull your rope. Any Spark? What color?
3. STILL no fire. It leaves: Magneto and Plug Wire.
Luckily, they are both in the same place! Tear your blower down, and check to see if the Magneto has slipped out of place (gap is WAY out), or if the Plug Wire has worn to the point it is grounding you out. While you are there, check your Kill Switch wire, to see if she is grounding you out then and there.
4. STILL no fire. That means: Magneto Failing, or Magneto JUNK.
Buy another one, replace it! (Or steal one from another junk Blower/Weedeater. These things are fairly standard, and easy!)
Or, Bad Plug Wire. Meaning she has failed out on you.
Wait......that means: Replace your Magneto! Lucky the things are built together right?
Posted on May 30, 2009
SOURCE: Won't start
Starting problems with 2-cycle engines are usually traced to fuel line/filter clogging due to jelling of the fuel mixture while the engine is idle. Best fix is fuel mix pretreatment with some kind of gas saver in the gas can. Marine grade additives are the best, such as 2+4 gas treatment. Now your stuck with pulling the fuel lines and blowing them clean. If the carb has a primer bulb, you can sometimes force the fuel through, but a complete cleaning is in order. Pulling the plug and putting a few drops of fuel mix directly into the cylinder head, (or in the air intake), can sometimes get the motor to fire. This proofs the problem as being fuel starvation.
Posted on Jun 05, 2010
the bvm 200 model has a 25cc piston and ring the rings are infamous for getting clogged and baked into theyre seat,this creates a compwesion problem and it will not start,gets fuel spark but without compresion it'll just not run or start,if careful you can remove the piston soak it with ring atached in carb cleaner and get it springy again or replace the ring with a new one it has a 1.353 (34.38)mm bore and a ring thikness of .061 hope this helps
Posted on Nov 04, 2010
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