Nik's Poulan Thread

[Modifiedmark]

Picked up another one that supposedly had low compression. However it checked out at 150 but it does have a big leak in the clutch side seal, I believe. I say believe, because in looking at IPL, I only see a seal for the flywheel side(530019051). I assume there is a clutch side seal and if so is it the same part#? Also IPL shows a flywheel side bearing on the outside of the seal. Is this correct? Only reason I picked up saw was because it was electronic ignition and was AV. I figure one of you guys who have a s25DA, like Joe25da might have some advice.

Bob

Bob, look at the IPL again and see where it list the flywheel side seal. You will see where it list a quanity of 2 seals. None of the IPL's I have show the bearing on the outside of the seal. The seals go on the outside.

 

[redunshee]

Bob, look at the IPL again and see where it list the flywheel side seal. You will see where it list a quanity of 2 seals. None of the IPL's I have show the bearing on the outside of the seal. The seals go on the outside.

My IPL nor the one at Poulanparts search shows the quantity. Tore saw apart late last night(filthiest saw I ever saw) and see what you are saying. However, unless my eyes are deceiving me one seal looks smaller(flywheel side) than the other. I'll have to put a mic on them as I think I'm seeing things. Both seals leak as well as the cylinder gasket so its a complete teardown. To be honest I found leaks by hooking my compressor up to saw(10lbs on regulator) as I could hear air escaping, but no bubbles, when using my Pressure/vacuum pump. I don't think that 10 lbs is too much pressure.

As usual thanks Mark, for your input. Its always spot on.


Bob

 

[cjcocn]

My IPL nor the one at Poulanparts search shows the quantity. Tore saw apart late last night(filthiest saw I ever saw) and see what you are saying. However, unless my eyes are deceiving me one seal looks smaller(flywheel side) than the other. I'll have to put a mic on them as I think I'm seeing things. Both seals leak as well as the cylinder gasket so its a complete teardown. To be honest I found leaks by hooking my compressor up to saw(10lbs on regulator) as I could hear air escaping, but no bubbles, when using my Pressure/vacuum pump. I don't think that 10 lbs is too much pressure.

As usual thanks Mark, for your input. Its always spot on.


Bob

Sounds like Mark is looking at a different IPL.

Check your PMs.

 

[Modifiedmark]

My IPL nor the one at Poulanparts search shows the quantity. Tore saw apart late last night(filthiest saw I ever saw) and see what you are saying. However, unless my eyes are deceiving me one seal looks smaller(flywheel side) than the other. I'll have to put a mic on them as I think I'm seeing things. Both seals leak as well as the cylinder gasket so its a complete teardown. To be honest I found leaks by hooking my compressor up to saw(10lbs on regulator) as I could hear air escaping, but no bubbles, when using my Pressure/vacuum pump. I don't think that 10 lbs is too much pressure.

As usual thanks Mark, for your input. Its always spot on.


Bob

Bob, I do the same thing sometime, by hooking up straight through the regulator on the compressor, BUT, I also have a gauge in my hookup to be sure of the pressure.

Its easy to go over 10lbs on the regulators gages and not know it.

10lbs is also plenty to me.

 

[redunshee]

Bob, I do the same thing sometime, by hooking up straight through the regulator on the compressor, BUT, I also have a gauge in my hookup to be sure of the pressure.

Its easy to go over 10lbs on the regulators gages and not know it.

10lbs is also plenty to me.

Ok. I see what you're saying. Maybe I should put a gauge in-line somewhere.

Thanks.
Bob

 

[Modifiedmark]

Ok. I see what you're saying. Maybe I should put a gauge in-line somewhere.

Thanks.
Bob

Exactly, what I mean! That way you know for sure how much air pressure your putting though it.

I have a feeling that maybe why you were having seal leaking problems on your other saw, you might have had more pressure then you thought.

 

[redunshee]

Probably right. Though on the bright side I wouldn't have seen condition of cylinder w/o pulling it off.

 

[PasoRoblesJimmy]

Seems I never have parts because I keep putting parts saws together!

I picked up two Craftsman 3.7 parts saws last week and seen I had about enough parts to make one out of them. They both had good P/C's so I set about picking throught the best parts and bolting them together.

I decided to try my hand at porting this one also. Had to rob the air filter cover and the outer bar plate off of my 3700 to try it out as those were the only parts I lacked for it.

My son came by and tried it out for me since I'm still not up to lifting that much yet.

I also tried a different muffler design for it also. I think it looks and works fine and is alot easier to fabricate.

The saw didn't want to run right because of a coil problem and when correcting that I realised I got alot more brg movement out of it then I did when I checked it without the flywheel on it.

So we got it running and it ran real strong but I went ahead and tore it all back down to go ahead and put new brgs in it this time. Since it ran so good with the used rings I'm going to put a new set in it when it goes back together this time also.

What do you guys think?

I love the looks of that muffler.

 

[handyrandyrc]

Well I screwed up the rebuild on the Poulan 4200 carb (Tillotson HS168A). Wanted to replace the Welch plugs, and thought the BRASS looking plug was just a plug. NOPE! Drilled into it and found it to be solid.

I think I ruined this carb, so I bought another one I was able to find on eBay. I'll get back on track with this 4200 and update when I receive the carb and get things back together. If I can get this powerhead running, I'll pick up a new bar/chain combo to put on it.

I'm thinking 20" would be a good length for this 4200. I don't cut much more than firewood, drop dead lodgepoles, etc. each year.

 

[joe25DA]

Exactly, what I mean! That way you know for sure how much air pressure your putting though it.

I have a feeling that maybe why you were having seal leaking problems on your other saw, you might have had more pressure then you thought.

Mark,
Was you 3.7 equipped with the powersharp?

 

[Torin]

I also tried a different muffler design for it also. I think it looks and works fine and is alot easier to fabricate.
What do you guys think?

I think it looks great, like it was supposed to be that way. Really nice work!

 

[Modifiedmark]

I love the looks of that muffler.

You ought to hear it!

 

[Modifiedmark]

Well I screwed up the rebuild on the Poulan 4200 carb (Tillotson HS168A). Wanted to replace the Welch plugs, and thought the BRASS looking plug was just a plug. NOPE! Drilled into it and found it to be solid.

I think I ruined this carb, so I bought another one I was able to find on eBay. I'll get back on track with this 4200 and update when I receive the carb and get things back together. If I can get this powerhead running, I'll pick up a new bar/chain combo to put on it.

I'm thinking 20" would be a good length for this 4200. I don't cut much more than firewood, drop dead lodgepoles, etc. each year.

Doh! Too bad on the mistake! That metering nozzle is replaceable if you can get one from Tillotson.

That 4200 will have no problem with a 24 or 28 if you need that long a bar also.

 

[Modifiedmark]

Mark,
Was you 3.7 equipped with the powersharp?

No this one was not.

 

[Outlaw5.0]

The 3750 is the 60-61cc version of the 330 pro.

 

[Modifiedmark]

The 3750 is the 60-61cc version of the 330 pro.

Is that a question or a statement?

Anyway whatever, its not completely accurate.

The 3750 is the 60cc version of the 3450.

The Poulan Pro Super 380 is the 60cc version of the Poulan Pro 330

 

[barneyrb]

Mark,
When you are doing that slick muffler mod are you removing the spark screen from around the insert. I did something real similar to a saw and cut the bottom out of the insert (connected the dots on all the outside holes with a dremel) but didn't really show any gains until I removed the screen.

 

[rms61moparman]

Well,

I'm definately not Mark but I will tell you real quick that those screens are the first thing to go.
They are as restrictive as hell and every one I've seen is nasty.
They collect carbon and then bake it to a concrete like substance.

Mike

 

[Modifiedmark]

Mark,
When you are doing that slick muffler mod are you removing the spark screen from around the insert. I did something real similar to a saw and cut the bottom out of the insert (connected the dots on all the outside holes with a dremel) but didn't really show any gains until I removed the screen.

Randy by insert you mean the diffuser correct? Must be what you mean as that has the screen around it.

Yes I useallly dump the screen. I see no need for it where I go.

What I have been doing so far is drilling 12 outside holes of the 18 holes total in the diffuser out to 3/8".

I think there is room to do the inner row also. That seems to be real good on my stock 3700 with the 3/4 tube out the side but I think later with this saw with a little porting on it, that I my try it without the diffuser in place at all. I will just make up a couple of support tubes to keep from crushing the muffler.

It may be too free flowing that way but I'll find out!

 

[barneyrb]

Yes, the diffuser is what I was referring to. As I said earlier, instead of drilling the holes out I basically cut the center of the bottom out. On my 330 when I cut the bottom out I didn't see any gains until I chunked that screen and it was a new saw. Both of you, thanks for confirming my findings.