Nik's Poulan Thread

[redunshee]

Bob you sure are having a heck of a time! Where are they leaking? Around the outside of the seals or between the inner rubber seal and the crank?

I will somtimes cut a piece of thin aluminum from like a pie tin or something, and wrap around the crank when installing a seal to keep the seal lips from flipping over and letting the spring inside fall out. Also I sometimes coat the outside of the seal with good old fashioned #2 permatex.

Hurrah, the 1000th post on this Thread. Wonder if its a record! Mark, the seals typically leak around the edges. That's whats so frustrating. I'm coming to conclusion that I have some out of round crank openings. I even went and bought some Yamabond 4 and spread some around the seal edges. Have to see if it works. Thanks for input.
Bob

 

[redunshee]

Bob you sure are having a heck of a time! Where are they leaking? Around the outside of the seals or between the inner rubber seal and the crank?

I will somtimes cut a piece of thin aluminum from like a pie tin or something, and wrap around the crank when installing a seal to keep the seal lips from flipping over and letting the spring inside fall out. Also I sometimes coat the outside of the seal with good old fashioned #2 permatex.

Relooked at my leak and saw that its leaking from around the inner rubber seal. GUess my Yamabond hepled some. Think I'm going to run saw and see if it'll seal itself after some running. Do you mean you wrap the aluminum above the seal around the crankshaft as your inserting the seal?
Bob

 

[barneyrb]

Relooked at my leak and saw that its leaking from around the inner rubber seal. GUess my Yamabond hepled some. Think I'm going to run saw and see if it'll seal itself after some running. Do you mean you wrap the aluminum above the seal around the crankshaft as your inserting the seal?
Bob

Use the pie tin as a bushing between the crank and rubber seal lip. Slide the tin and seal down as a unit and when the seal is in place (right before driving in with socket, and over the last lip on crank) remove tin and finish installing seal. Usually works for me.

 

[Modifiedmark]

Use the pie tin as a bushing between the crank and rubber seal lip. Slide the tin and seal down as a unit and when the seal is in place (right before driving in with socket, and over the last lip on crank) remove tin and finish installing seal. Usually works for me.

Yep pretty much what I do, except if the particular saw has a short step on the crank like the 036 pro I just did has, then I wrap the aluminum on the crank first, drive the seal and then carefully slip the aluminum off the crank and out of the seal.

 

[blsnelling]

I was stupid enough to send my ported 4000 cylinder home with FATGUY tonight. I was thinking I'd have him shave .020" off the base. But now I'm fearful I'll never see it again How oh how could I have forgotten he's been desperately searching for a 4000 P&C, let alone a ported one?

Here's the deal. These saws have a reputation of not having a lot of compression. Without a gasket, this 4000 still had .040" squish! That means it had almost .060" squish stock! That's just crazy. I'm shooting for .020 and have installed new rings. I raised the transfers to make up for the .040" the cylinder has been lowered. I also squared up the exhaust a little. My new smaller radius burr came in handy for that. This saw already outcut a stock MS361, so I'm really anxious to get it back together.

 

[redunshee]

I was stupid enough to send my ported 4000 cylinder home with FATGUY tonight. I was thinking I'd have him shave .020" off the base. But now I'm fearful I'll never see it again How oh how could I have forgotten he's been desperately searching for a 4000 P&C, let alone a ported one?

Here's the deal. These saws have a reputation of not having a lot of compression. Without a gasket, this 4000 still had .040" squish! That means it had almost .060" squish stock! That's just crazy. I'm shooting for .020 and have installed new rings. I raised the transfers to make up for the .040" the cylinder has been lowered. I also squared up the exhaust a little. My new smaller radius burr came in handy for that. This saw already outcut a stock MS361, so I'm really anxious to get it back together.

Yea. Nik has been after a 4000 P&C. He may hold it for ransom. Can't wait to hear, or better yet see, the results of you modifications.

 

[Modifiedmark]

I was stupid enough to send my ported 4000 cylinder home with FATGUY tonight. I was thinking I'd have him shave .020" off the base. But now I'm fearful I'll never see it again How oh how could I have forgotten he's been desperately searching for a 4000 P&C, let alone a ported one?

Here's the deal. These saws have a reputation of not having a lot of compression. Without a gasket, this 4000 still had .040" squish! That means it had almost .060" squish stock! That's just crazy. I'm shooting for .020 and have installed new rings. I raised the transfers to make up for the .040" the cylinder has been lowered. I also squared up the exhaust a little. My new smaller radius burr came in handy for that. This saw already outcut a stock MS361, so I'm really anxious to get it back together.

Brad, the 4000 is not the one with that reputation. Mine is bone stock and cranks 160. Its the 3400 in that series that you see with the lower compression numbers.

 

[FATGUY]

I was stupid enough to send my ported 4000 cylinder home with FATGUY tonight. I was thinking I'd have him shave .020" off the base. But now I'm fearful I'll never see it again How oh how could I have forgotten he's been desperately searching for a 4000 P&C, let alone a ported one?

Here's the deal. These saws have a reputation of not having a lot of compression. Without a gasket, this 4000 still had .040" squish! That means it had almost .060" squish stock! That's just crazy. I'm shooting for .020 and have installed new rings. I raised the transfers to make up for the .040" the cylinder has been lowered. I also squared up the exhaust a little. My new smaller radius burr came in handy for that. This saw already outcut a stock MS361, so I'm really anxious to get it back together.

I don't seem to recall anything about that.....:greenchainsaw:

 

[blsnelling]

Brad, the 4000 is not the one with that reputation. Mine is bone stock and cranks 160. Its the 3400 in that series that you see with the lower compression numbers.

Mine was really low, despite being almost new and in excellent condition. Maybe they don't all have .060" squish

 

[Bootsie]

Ok, two questions.

First, Is the Poulan 3700 closed or open ported?

Second, Does anyone happen to have a set of felling/bucking dogs for a 3700 kicking around that they would like to get rid of?

 

[rms61moparman]

Open.

Why would you want felling dogs on a saw that uses a 24" bar?????
Keep your chain sharp and you won't need felling dogs.


Mike

 

[Bootsie]

I will also be using for bucking some larger stuff, and of course it looks cool.

 

[Flintknapper]

I will also be using for bucking some larger stuff, and of course it looks cool.

You've got 10 hours:

http://cgi.ebay.com/Poulan-3400-370...emQQptZLH_DefaultDomain_0?hash=item2a01f8f33c

 

[Bootsie]

I have been keeping my eye on that but, by the time the final bid, shipping, and exchange come into play it will probably be cheaper for me to buy one from the dealer.

 

[Flintknapper]

Then what are you waiting on?

 

[Wildman1024]

You've got 10 hours:

http://cgi.ebay.com/Poulan-3400-370...emQQptZLH_DefaultDomain_0?hash=item2a01f8f33c

I'm so puttin a $100 bid on that and holding it for ransom... ROFL

 

[Modifiedmark]

I'm so puttin a $100 bid on that and holding it for ransom... ROFL

I will sometimes just cut one out of a piece of plate. Easier if you have the pattern to begin with though.

 

[joe25DA]

I thought about doing that too, both my 3.4s dont have dawgs.

 

[Bootsie]

I may end up doing just that. I have the gear for it.

 

[redunshee]

Got my 3400 going but..........

Well after reaasembling one of my 3400's(with a mild exhaust porting job), it iddles like a kitten. Tomorrow I plan to put a bar on it and see how it cuts. However this saw has a small leak in the flywheel side crank seal. Looses about 2 lbs over 1 minute. Leaking thru the inner rubber seal. I'm hoping that running it will eliminate the leak. What are the odds?. I assume if I monitor the spark plug color frequenlty I'll be okay? Any thoughts?
Bob