I have a Poulan Pro 25cc/210MPH Blower/Vac. Model BVM210VS. It starts up all right but when you press the trigger it reduces the power, not increases it. The two adjustment screws look like "star male

SOURCE: Poulan pro 25cc will start but not continue to run.

Is it difficult to pull? If so it could be the exhaust flame arrester has fouled with carbon. Over time it will become completely clogged and will not allow the engine to come up to speed or even start. Remove the exhaust and you will find the screen on the inlet side of the exhaust.

SOURCE: Need to Disassemble a Poulan Pro leaf blower

there are holes on top of the bore assembly you fit a allen wrench which is a t handle you can loosen them or tighten them with them if you can take it out put some locktight on the threads and tighten them down tight with the t handle sould take care of your problem

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.

Steve Allison

• 5569 Answers
• Posted on Oct 22, 2010

SOURCE: craftsman leaf blower wont start

The air gap for the ignition coil core to flywheel is adjustable on some engines and the gap does vary.
On a Stihl, I used a matchbook cover first, then doubled it and got the engine to start. That amounts to 8-10/1000ths (0.008-0.010") as measured with a digital caliper after-the-fact.
I'm troubleshooting another engine currently from a McCulloch Airstream IV that only has ~12 hours and no spark but the coil measures roughly as it should; around 1K Ohms. Was surprised to find the company went bankrupt in '99. Another one killed by Asians and fairly poor design.

SOURCE: trying to get my poulan

How do you know that the coil is bad? Have you checked it with an inline spark tester? It is very rare for this model to burn up an ignition module.

Please check for spark with an inline tester. If there is no spark with that tester, then disconnect the on/off switch and retest. If there is no spark with the switch disconnected, then indeed the module is faulty.

To access the module, the engine has to be removed from the case. Start on the right side and remove the muffler cover and muffler. This is a good time to visually inspect the cylinder. Look into the exhaust port with a flashlight and look at the piston. If there are scratches/scoring on the side of the piston or cylinder walls, then the blower is probably not worth repairing.
On the left side, remove the air filter cover, then remove the filter base (carb cover). This will expose the carburetor. Remove the 2 fuel lines leading to the carb, and then the throttle linkage and remove the carb. Next, remove the carb mount.
Now, remove the 15 or 20 screws that hold the plastic case halves together. The lower hinged cover will have to be releases before the case will seperate. Once you have the case apart, the engine can be removed. The ignition module is now exposed and can easily be replaced.
To set the proper gap of the new module to the flywheel, use a clean and dry business card. Lay the card across the magnet of the flywheel and place the module against it, then install the screws and tighten up the module. Remove the business card.
While you have the blower down this far, check to make sure the cylinder is tight against the crankcase. This model is prone to having the cylinder come loose and will effect compression.
Reassemble in reverse order. Take pictures as you go to aid in reassembly. If the blower is more than a couple of years old, I would recommend to replace the fuel lines at this time. It will save a repair down the line.
You will need allen wrenches, phillips screwdriver, T15, T20, & T20 torx, a large, clean workspace. This is not a repair for the beginning mechanic, but with patience, it is not too difficult.
Good Luck !