Author Topic: Poulan 3450 Carb issues  (Read 1293 times)

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Offline redunshee

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Re: Poulan 3450 Carb issues
« Reply #20 on: October 18, 2014, 09:20:24 am »
I just received the rebuild kit in the mail.  There are many more parts than what I thought were going to be in there.   Removing the punch plug also seems scary since the manual says I can damage the carb if not done correctly with the "special" tool.  Is it imperative that I replace all the parts? 

Also since this is the time of year for using the saw and it still runs, I am inclined to hold off till a cold winter day to rebuild it.  I don't want to disable the saw now.

Its likely you won't have to remove and replace the welch plugs.  Just be sure to match the pump and metering diaphragms with those currently in your carb.  Most carb kits are used on many diff. carbs so extra parts are included.

Offline jmester

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Re: Poulan 3450 Carb issues
« Reply #21 on: October 18, 2014, 08:27:39 pm »
Have seen worn clutch springs make the chain move on a saw that is set at the correct idle speed. But I am not so familiar with the poulan style circle spring so maybe not an issue.
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Re: Poulan 3450 Carb issues
« Reply #22 on: October 18, 2014, 10:50:48 pm »
Have seen worn clutch springs make the chain move on a saw that is set at the correct idle speed. But I am not so familiar with the poulan style circle spring so maybe not an issue.

Yes it can happen on a clutch spring on a 3450 also.    All it takes is for someone to run the saw getting the clutch very hot and the heat takes the tension out of the spring.
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Offline rockfishon

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Re: Poulan 3450 Carb issues
« Reply #23 on: November 10, 2014, 04:47:57 pm »
Is there an easy way to remove the carb without taking the tank assembly off?  It seems that the screws that fasten the carb to the hangle support are in the way of removing it.

Offline Cut4fun .

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Re: Poulan 3450 Carb issues
« Reply #24 on: November 10, 2014, 05:01:51 pm »
Yes you can, but I got to run sorry.
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Offline 660magnum

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Re: Poulan 3450 Carb issues
« Reply #25 on: November 10, 2014, 05:02:56 pm »
I've removed and replaced them without removing or even loosening the tank.

It's not easy but can be done if you jiggle things around just right.

It's been three years since I did one. I'd have to have it in front of me?

Seems like you had to leave the screws in the carb as you remove it?
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Offline rockfishon

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Re: Poulan 3450 Carb issues
« Reply #26 on: November 10, 2014, 06:06:46 pm »
I got it but I don't think it would be called a preferred way.  Loosened the top screw that attaches the handle assembly to the carb.  Then I pushed the carb screws through with the hex key.  Had to wiggle and pull hard but I don't think anything bent.  Inside the carb looked really clean.  Just replaced both side stuff and cleaned the outside (just to make it look clean).  I have not had time to start it and try to tune it again.

Offline Cut4fun .

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Re: Poulan 3450 Carb issues
« Reply #27 on: November 10, 2014, 06:40:43 pm »
Yeah it was a PITA. But was able to wiggle it out and push it back on.  Took some patience. I didnt even remove the rear handle part from what I remember. 
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Offline 660magnum

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Re: Poulan 3450 Carb issues
« Reply #28 on: November 10, 2014, 09:04:12 pm »
I gave you a Karma for changing your carb without removing the tank assembly.   +1
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Offline rockfishon

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Re: Poulan 3450 Carb issues
« Reply #29 on: November 11, 2014, 03:27:45 pm »
So I seem to have the same symptoms.  I can't get the saw to idle properly.  I did not replace the gasket on the back side of the carb where it attaches to the support.  It looked fine and was not torn.  The inside of the carb looked very clean with no build up and all screens were immaculate.

The saw has a high idle with the idle screw all the way out.  When I set the high speed needle to what I think is the correct mixture and then tune the low speed needle, the saw races to what seems to be half throttle.  When I set the low rich,  the rpm's decrease and it will eventually stall.

I think I have to check to make sure there is no air leak but I am fairy certain that there isn't.

 

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