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Author Topic: Poulan 3400 Counter Vibe modification?  (Read 4236 times)

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Offline msc1072

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Re: Poulan 3400 Counter Vibe modification?
« Reply #10 on: February 16, 2013, 12:26:02 pm »
Thanks Brokenbudget,
I may just leave it alone and do the mods you suggested. Have you tried advancing the timing any with the mods you described?
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Offline 3000 FPS

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Re: Poulan 3400 Counter Vibe modification?
« Reply #11 on: February 16, 2013, 12:31:33 pm »
This 3700 I just finished I advanced it by 4 degrees.   I cut the key way alittle wider in the flywheel.
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Offline msc1072

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Re: Poulan 3400 Counter Vibe modification?
« Reply #12 on: February 16, 2013, 12:45:10 pm »
How does the FW stay locked in place with the wider keyway? I read about slotting the coil a bit to advance timing, any experience with that?
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Offline Cut4fun .

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Re: Poulan 3400 Counter Vibe modification?
« Reply #13 on: February 16, 2013, 12:46:20 pm »
Quote from: 3000 FPS on February 16, 2013, 12:24:46 pm
Quote from: msc1072 on February 16, 2013, 12:20:08 pm
3000FPS,
Did you add the vent slots to your air filter cover?

That is a standard air filter cover for a 3700.  It is one of the tell tell signs for determining a 3400 from a 3700.  You can get one of those filter covers off of ebay and it should fit right on your 3400.  It also uses the same filter as the 3400.

I didnt know that till now.   8)   

Another option.  I sold my last high top 4000 air filter cover, but know where you can get them and new air filters.
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Offline 3000 FPS

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Re: Poulan 3400 Counter Vibe modification?
« Reply #14 on: February 16, 2013, 01:02:28 pm »
Quote from: Cut4fun_ on February 16, 2013, 12:46:20 pm
Quote from: 3000 FPS on February 16, 2013, 12:24:46 pm
Quote from: msc1072 on February 16, 2013, 12:20:08 pm
3000FPS,
Did you add the vent slots to your air filter cover?

That is a standard air filter cover for a 3700.  It is one of the tell tell signs for determining a 3400 from a 3700.  You can get one of those filter covers off of ebay and it should fit right on your 3400.  It also uses the same filter as the 3400.

I didnt know that till now.   8)   

Another option.  I sold my last high top 4000 air filter cover, but know where you can get them and new air filters.

Really I was thinking about going to a 4000 filter and cover on the 3700 for better flow.   The 4000 uses a mesh filter instead of the flocked and it also has more surface area.  Where did you say that was.
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Offline Cut4fun .

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Re: Poulan 3400 Counter Vibe modification?
« Reply #15 on: February 16, 2013, 01:07:54 pm »
2  different places. But I can show you.  ;)
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Offline 3000 FPS

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Re: Poulan 3400 Counter Vibe modification?
« Reply #16 on: February 16, 2013, 01:09:07 pm »
Quote from: msc1072 on February 16, 2013, 12:45:10 pm
How does the FW stay locked in place with the wider keyway? I read about slotting the coil a bit to advance timing, any experience with that?


Well to advance the timing you turn the flywheel in a clockwise direction.   So I widen the slot on the left side so that it will still rest against that side.   You only need about a 1/16th of an inch to get around 3 to 4 degrees.   I then line up the flywheel where I want it and tap in on with a socket and hammer so that it gets tight on the taper.  Then I tighten it the rest of the way down with a 3/8ths impact gun.    I then double check my timing and make sure it is right and the taper on the fly wheel is actually enough to keep it in place.
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Offline Cut4fun .

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Re: Poulan 3400 Counter Vibe modification?
« Reply #17 on: February 16, 2013, 01:12:19 pm »
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Offline 3000 FPS

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Re: Poulan 3400 Counter Vibe modification?
« Reply #18 on: February 16, 2013, 01:15:26 pm »
Quote from: Cut4fun_ on February 16, 2013, 01:12:19 pm
filter  http://www.usedpowerequipmentparts.com/servlet/the-2318/Poulan--Craftsman-/Detail

Both high top covers sold out.  :-X


Well shoot.   The filters are not to bad to find but the covers are a different story.    Why they sold out so quick.
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Offline rms61moparman

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Re: Poulan 3400 Counter Vibe modification?
« Reply #19 on: February 16, 2013, 02:04:27 pm »
Quote from: 3000 FPS on February 16, 2013, 01:09:07 pm
Quote from: msc1072 on February 16, 2013, 12:45:10 pm
How does the FW stay locked in place with the wider keyway? I read about slotting the coil a bit to advance timing, any experience with that?


Well to advance the timing you turn the flywheel in a clockwise direction.   So I widen the slot on the left side so that it will still rest against that side.   You only need about a 1/16th of an inch to get around 3 to 4 degrees.   I then line up the flywheel where I want it and tap in on with a socket and hammer so that it gets tight on the taper.  Then I tighten it the rest of the way down with a 3/8ths impact gun.    I then double check my timing and make sure it is right and the taper on the fly wheel is actually enough to keep it in place.




To advance timing, the flywheel must go COUNTERCLOCKWISE!
The crank goes clockwise if you are widening the slot in it, you will remove material from the left side.
I always remove from the flywheel. They are easier to replace if you mess up!!!
The engine rotates counterclockwise and to advance, you have to get it there earlier.


Mike
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