3700 & 4000 piston is bigger than 4200 piston, why is that? the 4200 is a reed valve saw and creates more torque? This may be a dumb question but i was just looking at a few pistons and thought that was strange,
Nik's Poulan Thread
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3700 & 4000 piston is bigger than 4200 piston, why is that? the 4200 is a reed valve saw and creates more torque? This may be a dumb question but i was just looking at a few pistons and thought that was strange,
homelitejim
Full of Scrap
I picked up a orange 361 today, everything looks in order so I think I will try and get it to run.
I have a 136 that is equivalent to the 361. believe the 141 is equivalent to the 401. maybe wrong though. if you don't want it i'll take it off yer hands. just sayin
I picked up a orange 361 today, everything looks in order so I think I will try and get it to run.
Yep the 4200 bore is smaller, but the stroke is longer.
Long stroke and reed valves generally make more power and torque.
A 4200 will eat up a 4000 in a cut, especially with longer bars.
But then again a 4200 will hang with most modern 70cc saws with longer bars as well.
Interesting. I always figured the 4200 had a bigger bore. Who knew it was a stroker!?
That's one saw that I'm on constant look for
homelitejim
Full of Scrap
I got my info from acres site or maybe I read it wrong or something. Thanks for the correction. [emoji16]
ChipsFlyin
ArboristSite Guru
And mine 
The 3450 is done. Cleaned up nice too. Got this one as a solid runner, the guy fired it up on the third pull after it say in the bed of his truck overnight 5* out. But, I like to know everything is good so I tore it down. Replaced fuel line and filter pulse line was new. Guts look like new. Saws like these tend to be low hour. Bought by homeowner types to limb and trim here and there, I have yet to find one worked hard or any where near what it's capable of. I ditched the vanguard chain put a descent loop on it. Modded the muffler cut the tube out and added three 5/16" holes to the diffuser nothing to crazy. Can't wait to fire it up these were awesome saws. Ohh and this is a type III saw too
I had one here for ya! Didn't want to hound ya about and finally let it go after about 6 months..
I forgot! You did, I remember, then ya disappeared for 4 months! I don't blame ya Id have done the same. On my Poulan list are the 4200, 2700, 3750 and a few others. I haven't done a lineup of all of them in my collection in a while. Prob time too.
blk05crew
I like 'em green
The 3450 is done. Cleaned up nice too. Got this one as a solid runner, the guy fired it up on the third pull after it say in the bed of his truck overnight 5* out. But, I like to know everything is good so I tore it down. Replaced fuel line and filter pulse line was new. Guts look like new. Saws like these tend to be low hour. Bought by homeowner types to limb and trim here and there, I have yet to find one worked hard or any where near what it's capable of. I ditched the vanguard chain put a descent loop on it. Modded the muffler cut the tube out and added three 5/16" holes to the diffuser nothing to crazy. Can't wait to fire it up these were awesome saws. Ohh and this is a type III saw too
Cool saw Joe, looks really nice! How many cc's was the type III again?
No biggie.
I did check the compression on that 3700 yesterday but I forgot that when I put it together I didn't use a base gasket for it, so thats not going to be a stock reading. FWIW, it was in the 160 range. Same as the Craftsman 3.7 I just put in the trading post.
A type III 3450 would be 60cc like a 3750. So it actually is a 3750 just aint stickered as such.
blk05crew
I like 'em green
Gotcha. Thanks!
redunshee
Addicted to ArboristSite
Yea, Joe they are sweet saws. Had one I sold, immediately regretted it and now have a PP380 on the bench.. Go figure.The 3450 is done. Cleaned up nice too. Got this one as a solid runner, the guy fired it up on the third pull after it say in the bed of his truck overnight 5* out. But, I like to know everything is good so I tore it down. Replaced fuel line and filter pulse line was new. Guts look like new. Saws like these tend to be low hour. Bought by homeowner types to limb and trim here and there, I have yet to find one worked hard or any where near what it's capable of. I ditched the vanguard chain put a descent loop on it. Modded the muffler cut the tube out and added three 5/16" holes to the diffuser nothing to crazy. Can't wait to fire it up these were awesome saws. Ohh and this is a type III saw too
redunshee
Addicted to ArboristSite
Its weird cause the Type 4 goes back to 54cc's 0r 56cc's(don't remember exactly). Could never figure out why they offered the Type 3.
No kiddin. Haven't seen a type 4 yet. I'd like to get a 3450 now, a 54cc one.
