Poulan Pro starts but shuts off

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  #1  
Old 10-04-09, 04:44 AM
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Poulan Pro starts but shuts off

I have a Poulan Pro 445 Pole saw. It has given me problems since new. It got to where it would not run when lifted at a 45 degree angle, kind of need that in a pole saw. Then it got to where it would start but as soon as I pulled the trigger to speed it up it would shut off.

I bought a whole new fuel system and installed. Carb, lines, pump and all. It ran good for a couple of hours. This was not constant run. The next time I went to use it I ran it for about a 1/2 hour and then it started again. Starts right up but as soon as I pull the trigger it starves for fuel and quits.

ANy suggestions? I am really getting frustrated with this saw.
 
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  #2  
Old 10-04-09, 06:41 AM
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Just about everything on it is going back to the fuel coming from the tank. You initial problem could have been just the position of the filter in the tank. If the fuel line was bound up and kept the filter from laying on the bottom of the tank when you lifted the saw = no fuel. It may have had too much line on it.

What you're describing now is going back to the fuel system, naturally. Since you had it running and it started acting up, check all the screws and bolts you had out for tightness.

Can easily be the pump diaphragm, but since it's new (?), you should check out the fuel filter/cap venting/choke position. Then try to adjust the low speed screw a little at a time to see if that helps. Start with 1 1/2 out from lightly seated and work from there.
 
  #3  
Old 10-04-09, 07:45 AM
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Thanks marbobj, I wanted to adjust the low speed jet but they have funky caps that looks like it takes some sort of inverted cone to fit over these caps. The caps do appear to have some fine groves in them but I don't have anything that will fit it.
 
  #4  
Old 10-04-09, 08:29 AM
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That's emissions control stuff, which is fine if everything is working like it should, which often isn't the case.

A lot of guys fabricate a little tool to turn those things out of a plastic line. That low speed setting is what transitions to the full throttle so it affects the acceleration of the engine.
 
  #5  
Old 10-04-09, 09:59 AM
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The picture below shows a "make do" to remove the screws then you can cut slots in them for a screwdriver. Have a good one. Geo
 
  #6  
Old 10-04-09, 11:07 AM
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Oh nice. Thanks. I will sure give that a try.
 
  #7  
Old 10-04-09, 11:24 AM
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Go to Ebay,and type in walbro tools,and order the screw driver set you need for the little carbs.

Jerry
 
  #8  
Old 10-05-09, 04:33 AM
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I looked at the walbro tools but the picture is not clear. The description says for Splined carbs but does not show a clear picture. Is this the right tool for the caps I mentioned I had on my carb?
 
  #9  
Old 10-05-09, 09:44 AM
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Originally Posted by purplewg View Post
Oh nice. Thanks. I will sure give that a try.
It's easy to make fun of the "make do", however it works and doesn't cost $10 for a onetime screw removal, when you order the tool you may as well buy the 5 piece kit as your next small carb probably won't have the same type screwheads. Have a good one. Geo
 
  #10  
Old 10-05-09, 10:25 AM
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Originally Posted by geogrubb View Post
It's easy to make fun of the "make do", however it works and doesn't cost $10 for a onetime screw removal, when you order the tool you may as well buy the 5 piece kit as your next small carb probably won't have the same type screwheads. Have a good one. Geo

Oh no geogrubb. You misunderstood me. I meant no disrespect. I was actually happy and my "great" meant great idea and thanks. I am sorry if you took it wrong.
 
  #11  
Old 10-06-09, 07:13 PM
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That really is good idea, Geo. I've seen that post of yours before, but I can never find it to pass it on the next time.
 
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