Husqvarna 365 and 372XP engine/chassis differences.

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Den

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I was looking at the new 2021 Husqvarna catalog last night. It shows the following specs.

2021 Husky 365: 70.6 cc engine, 4.9 horse power, 14.1 pounds (power head only).
2021 Husky 372XP: 70.6 cc engine, 5.5 horse power, 14.6 pounds (power head only).

The cubic inches/piston and cylinder seem identical on both saws. Chassis seems identical on both saws.
Wondering why the 372XP is 1/2 pound heavier and .6 horse power bigger?
All I can guess is Husqvarna achieved more horse power on the 372XP via carburetion. I don't think the stroke is different. Weight difference I'm not sure.
Maybe you Husky experts can shed some light on it for us.


.
 
Just the divider is the only difference in the engine. IDK if it's a true .6 HP less?
It seems they could never make up there minds if the oe was 5.3 hp or 5.4 hp or the XT is 5.4 or 5.5 hp? Maybe its 5.4hp and the 365 XT is 5.0hp+ ?.
The 365 oe & X-torq, I have seen them priced at $300 CND below the 372. Perhaps somewhat more justified with the OE as it had 48mm top end and originally had a Zama C3M carb I understand they had a different crank the first year but they had problems with both parts so they then went to the same crank with the Walbro HD-6. In the latter yrs, in and about 2007 I still seen a $300 gap in price at times.
They upgraded the Walbro to the HD-12 for the 372oe (They may have eventually came out with it first on the 371 ..IDK?)
365 was only rated for 12,500 RPM originally.
It's a marketing thing. They will tell you that's a consumer saw when there in no real difference. They purposely make one inferior. In my time they did that with the 61 vs 266. Second generation 61 vs the 272.
257 vs 262.
362/365/371/372. The 359 had half hp less than the 357. The 359 had clogged transfers but I had tried my ported 357 top ends on the 359 bottom end (without the crank stuffers) and it was night and day to me.

It is well documented on here that Husqvarna was less than honest with their weights.
Not only weights but vibrations in m/s 2
They seem to be getting more real these days.
On the vibrations with the 365/372 xt they are at 5 .7/8.0 (front and real handle)
I will post the data of the 362/365/372 and check out the weight and vibes differences on paper.

If you look below it will give you the weight
of the 365/372 plus the generated model "XPG" In LB & kg from what looks to be 2010 manual. That's the yr the xt came out and it didn't say copy right? The heated model's have always been rounded off to .2 kg/.44lb more than the xp model so I thought you may be looking at a mistake but they have it in the manual as both the 365 & 372 at the same weight at 6.4 kg and they have the more recent heated model at 6.8 kg. Yeah the 372 has been advertised as 6.6kg for a long time.
So the 372xt gained weight? ..Or they both gained weight and they lightened up the 365?
__________
Although their pic shows the 372 with a small single dog, maybe they now weigh it with faller dogs and perhaps a wide discharge cover? (I highly doubt what I say...Dont you??..lol) You just don't know with these guys.
In the oe models, I have seem holes in the drum with early 371 and lighter/different XP flywheels. Never seen that with the xt though.

Anyway, you said "Husqvarna experts " I'm just an Investigative Journalist. I have never actually ran a Husqvarna. Not yet but I do hope to one day, soon

_______



TECHNICAL DATA
Technical data
365 X-Torq 372XP X-Torq 372XPG X-Torq
Motor
Cylinder displacement, cu.in/cm3 4,31/70,7 4,31/70,7 4,31/70,7
Cylinder bore, inch/mm 1,97/50 1,97/50 1,97/50
Stroke, inch/mm 1,42/36 1,42/36 1,42/36
Idle speed, rpm 2700 2700 2700
Power, kW/hp @ rpm 3,6/4,9 @ 10 200 4,1/5,6 @ 10 200 4,1/5,6 @ 10 200
Ignition system
Spark plug NGK BPMR 7A NGK BPMR 7A NGK BPMR 7A
Electrode gap, inch/mm 0,02/0,5 0,02/0,5 0,02/0,5
Fuel and lubrication system
Fuel tank capacity, US pint/litre 1,63/0,77 1,63/0,77 1,63/0,77
Oil pump capacity at 9,000 rpm, ml/min 4-21 4-21 4-21
Oil tank capacity, US pint/litre 0,89/0,42 0,89/0,42 0,89/0,42
Type of oil pump Automatic Automatic Automatic
Weight
Chain saw without bar or chain, empty tanks, lb/kg 14,1/6,4 14,1/6,4 14,5/6,6
Chain/bar
Standard bar length, inch/cm 20”/51 20”/51 20"/51
Recommended bar lengths, inch/cm 16-28”/38-70 16-28”/38-70 16-28”/38-70
Usable cutting length, inches/cm 15-27”/38-69 15-27”/38-69 15-27”/38-69
Pitch, inch/mm 3/8" /9,52 3/8" /9,52 3/8" /9,52
Thickness of drive links, inch/mm 0,050/1,3 0,050/1,3 0,050/1,3
0,058/1,5 0,058/1,5 0,058/1,5
Drive sprocket type/teeth Rim/7 Rim/7 Rim/7
Chain speed at max. power, m/sec 22,7 22
 
They have a slightly new case now from the last release of the saw, think it will show up in and around the bar oiler :)
I was wondering if it could be the case *looks left looks right* ok bad pun.
So they both gained weight , at least on paper and rightfully so (they lie)...Well I have not seen the 365 documented at 6.6 kg but then again, it's not a saw I would have looked for stats In the past. ( I have bought 3 of them brand new to convert) Can't find any record of this stat today, Can you?

I mean it makes sense with today's technology. The 371 originally came in at 5.9kg. (Comparison:,,462 came in at 6kg)
They had problems with breakage with longer bars and pumped up the front case weight to 6.0kg and then 6.1 ...then it became '6.2 on the books' as it moved into the 372oe. In reality it was 14. 75lb with the OE and faller dogs & wrap. 15lb for the 51.4mm and wide cover.
It's a saw that by their measures, started out at about 12.8 lb

The word is, the case of the 572 is reduced by 200g less than the case of the 372 .
Need to mention 30g off the chain cover and 30 g off the clutch and 28g of the coil.
They beefed up the muffler and the bottom end to come in at the same as 372 xt basic weight. (6.6kg)
 
My 2009 365 Special was shipped with the Walbro HD-12B. Book weight says 13.2 lbs. 48mm cylinder bore.
Those are the best place to start in my most humble opinion if you are doing a build. 50mm original edition 372's and 2171's next. Seems they had so much less issues in the cases. I get porting the 372/365 -Torq's is easy because of the transfer port caps. Therefor a very popular version. I just toss all that spec sheet crap aside when discussing these. Simply the 371/372 Original Editions are a completely difference saw design. Break point 2010 . And since there were updates and different models and configurations the weights will be different. A general rule though.....the X--torqs are a bit heavier and taller than there model counterparts prior to 2010. Simply because X-torq required a taller piston, cylinder, plastic and a rebalancing with the crank. They too had a series of "upgrades" from there 2010 offerings to now and by 2016-17 were pretty well sorted out. New ones should be solid. But heavier than the OE 371/372 from the late 1990's early 2000's. :) ALSO the X-torqs did have a slightly different power delivery, and why would anyone be surprised?? DIFFERENT design top end! And their ignitions were rev limited to 13300 reflecting that where the OE's typically were set at 13500 for initial tuning. Again a result of the different design. AND heavier piston. Early on setting them at 12,900-13,000 helped ensure life past warranty. So many were lean from the factory bouncing off the 13300 rev limiter as delivered....then the "experts" trying to get them to sound like a 372...would lean them out more..... a lot of pto side bearings failures, in those early years. The ones set in the 12,900 range at the dealer are prolly still cutting :) but I'm rambling. I don't see the point of talking about 372 OE's and XT's as if they are the same saw or even a different model in the same lineage. They are just completely different saw designs therefore every measurement that matters will be different.
 
My current 372 "kick" for the last couple of years is building Original Edition 372/365/2165/2171 saws from blown up X-torq's. Problem has been it's not uncommon to see the PTO side case have the bearing pocket beat open to where it no longer holds the bearing and or won't seal any more. Done a bunch of build video's taking the "bones" of X-torqs and building cool and fun saws...assuming the cases are OK. I've had LIMITED luck with Aftermarket cases in the same scenario. AND also using the X-torq's carb and filter setup...did a few video's on that. A 365 48mm out of X-torq bones and a 2165 48mm from a 2166 blown up bones. Both have been fun builds. :)
 
Thanks Weimedog for the info on your video's, One my favorite saws to work on and picking up bits and pieces of info that I didn't know about, don't know about my last year of F Tec cases , 2 out of 6 sets of cases had casing holes on the PTO side, little disappointing after doing a final pressure vac test to discover I had to start over again and toss them into the scrap bin, not trusting them I haven't ordered anymore, just use OEM, previous to that I had no problem with them.
 
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