Nitro-Fish
ArboristSite Operative
Does anyone know the differences between the 371xp & 372xp if any? What kind of compression should either of these (used) saws have to still be OK for moderate use?
Compression should be 140-150 on a healthy saw.
The 372 has more junk like quick release covers, side chain tensioner, etc.
There might be a difference in the number of piston rings, I dont remember. 371's are great saws too
371 has a single ring piston, the 372 has 2 rings. Other small differences but not many. Everything is interchangeable.
well i just checked my compression on all the saws and was kind of suprised at the outcome.
371xp 130psi i have had this saw since 1999
372xpw 140psi this saw is new and only on its 5th tank of gas
365special is at about 148psi i have had this saw since 2000. i installed the 372 big bore kit on it from bailies about 7 moths ago.
i find it strange that the new 372 doesn't have more compression. maybe its because its not broken in yet?
all three saws run very good and its not uncomon for me to use them in extrem cold weather (-35c and colder) and they all preform great. when cold the 365 takes 8 to 10 pulls
well i just checked my compression on all the saws and was kind of suprised at the outcome.
371xp 130psi i have had this saw since 1999
372xpw 140psi this saw is new and only on its 5th tank of gas
365special is at about 148psi i have had this saw since 2000. i installed the 372 big bore kit on it from bailies about 7 moths ago.
i find it strange that the new 372 doesn't have more compression. maybe its because its not broken in yet?
all three saws run very good and its not uncomon for me to use them in extrem cold weather (-35c and colder) and they all preform great. when cold the 365 takes 8 to 10 pulls
kurtty, have you checked the 372xpw since this post? I'm only getting 140psi on mine after 4-5 pulls.
You know I was thinking of posting a thread about my xpw only having 140 psi... Now I feel better that everyone elses saw sux. My 272xp has 180+ psi :jawdrop: So I was really POed when I tested my 372 and got 140. The PC look good no scoring. And I know its broke in... I guess thats why they have the same hp as the smaller cc 372's. Maybee I will give madsens a call in the morning and ask them if husky is doing something fishy. Just think of the squish size the saws must have.
+1 My two 372s run 148 and always have so when they get to 130I don't have extensive experience here..........but seems to back up what I've found on the saws in my posession. I've got a rebuilt 371 that tests in the mid-upper 140s and a pristine 365 maybe 4-5 hrs that tests high 140s to maybe 150.
My best long term saws are my 028s, one is over 20 years old, original and it tests out at low 160s consistently. My 14 year old 036 tests out in low 160s as well. All with the same guage. Not trying to start a flame here, just comparisons. It just seems from my limited experience that maybe these are just a lower compression design?? They are also my only two saws with compression release valves, not saying it's the culprit, just saying....... Again, this isn't an "S" vs "H" thing as I really like all my saws so hope no one mis-interprets my intentions here. I thought it was odd when my older 371 rebuilt with the broken-in piston/rings tested roughly the same as my low hour 365.
Oh BTW, should add... the 371 & 365 run excellent, both of 'em. Plenty of grunt, good revs and chain speed so I have no worries. I personally think compression testing/comparison is best used to observe changes over time on an individual engine vs trying to compare many different ones of different design, size, etc...
The 75cc version is in the US 2008 catalog, and are rated at 4.0kW (and a hp number that has to be a misprint).....
Online only shows the small 372xp and the 3 575's.... The 575 had 4.0kw though.
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