Echo PB-251 Blower wont start

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  #1  
Old 07-27-12, 09:56 AM
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Echo PB-251 Blower wont start

It is an Echo PB-251 blower. It has a Zama RB carb. I put a new plug. Dissy and cleaned the carb including the needle, all holes and the screen. I checked the height of the needle with a Zama guage. I did not put a carb kit in it. I removed the muffler and cleaned the screen. There is gas moving through the carb when I prime it. The compression was >120 psi on only 2-3 pulls. There is plenty of spark using a soark tested. I have blown out the fuel lines and I dont see any cracks or breaks. It appears that no gas is getting to the plug as the spark plug porcelin is pure white. I have tried putting some fuel in the plug hole however it still wont fire. Help please.
 

Last edited by jl66redcpe; 07-27-12 at 10:12 AM.
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  #2  
Old 07-27-12, 10:18 AM
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Check the plug itself to see if it is sparking. You have the other required ingredients for it to start it seems.
 
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Old 07-27-12, 10:43 AM
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Cheese - thanks for the reply. I will try another plug however the plug is dry as a bone.
 
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Old 07-27-12, 11:22 AM
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I tried another known good plug - same result wont start. Plug still dry. I removed the carb again and removed the rotor (top). Blew air through the jet that goes up the middle of the carb from the metering chamber just to make sure. There was gas in the metering chamber. It appears like there is just no gas getting to the cylinder. I am going to try a carb kit.
 
  #5  
Old 07-27-12, 02:29 PM
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I just ordered a crankcase gasket. I have a feeling that is what the problem is. I had a similar problem on a homelite blower.
 
  #6  
Old 08-13-12, 02:54 PM
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Well, I disassembled the blower today to install a new crankcase gasket. When I removed the flywheel, I noticed that the keyway was partially sheared. Why on earth did Echo mold the keyway into the flywheel ??????? A new flywheel is about $45 including shipping. I notified the customer to see if he wanted me to fix it. I would have had one hour labor in it as well. The customer asked me to junk it as he will buy a new one for about $159. I think I will look for a used flywheel and try to get it running. I still think there is a leak at the crankcase gasket as the plug does not seem to be getting fuel.
 
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