So before posting that, I checked the Husqvarna site as I ran the 371/372 Professionally from it's beginning in 1996 to 2017 and knowing ms2 was about 3.6/4.0.
As a matter of fact, I confirmed that today through a manual online and that's what the 372 oe finished its run at.
I believe the 372 xtorq was slightly less but now they won't show the data.
You can look up the 371xp manual from the '90s and it will show you
362/365/371 under Technical Data.
365 was only front/back 3.5/3.6 & 371 was 3.1/4 6.
Anyway I was shocked to see Husqvarna post front/back 5.7/8.0 (as you posted)
I was searching a lot of saws about 3 yrs ago on this matter at the time when they started releasing the data on the new MS 462,500i & 572.
That's when the 390 was coming up on the Husqvarna site as about 6.5/ 7.5 but in manuals and distributors then when they were around 5 m/s acceleration
At the end of that day It seemed the more I learnt...the less I knew.
The 372 vibes more than the 390 on paper now
The 395 came in at 10 on one hand/arm
That's 4 times the magnitude as the 572 on the vibration chart/calculator.
Where as you can run the 572 for 8 hour to accumulate the max 400 points at 50 point an hour. 400 points would be reached at 2 hours with the 395. Not to exceed 121 points in one hour. So basically it's rated to run about 36 min per hour until you reach 120 minutes and that's the day with hand held equipment, so as to prevent HAVS (Hand/Arm Vibration Syndrome)
This has been a recognized international organisation since 2001. It's since been adopted in north America.
The vibration of the 372 has had an average acceleration of 4 metres per second per every second for 20+ yrs. Now they say its 8 m/s
6 hours run time was 190 points.
As of last night I find out it's 770 in that time.
I went from half the limit to almost twice the limit, over night.
I want to find out if the manufacturer was lying then or are the lying now??
I really hope they were lying then.
They have been known to lie about the saw weights and seem to be more accurate these days on that so maybe these numbers are real? I could see them not having a foot to stand on in a court room, though.
Having said all that... how can we gauge m/s if the manufacturers are dishonest?
I read some specs on hand held equipment today and often old equipment had triple the acceleration compared to modern equipment.
They had chainsaws at 6m/s average
So maybe you are between 12-18m/s 2
Roughly 30-60ft per sec for every second
Google "HAVS chart, images"