Husqvarna chain saw / cutoff  specifications by model
Including engine displacement, bore, stroke, power, weight, basic carburetor settings, and idle/max RPM specs.
Updated November 2013 by Lee Sluga, service manager for Bill's Saw Shop, Salamanca, NY, (716) 938-9846.

This is an unofficial list. I am human and have been known to make mistakes, so use it at your own risk.
However, I have made every attempt to get accurate and official results for all listed numbers, from reliable sources such as workshop manuals.

Plug time! We do stock lots of parts, accessories, bars, chains, etc and ship daily.   Good deals are to be had, just ask.

Thank you for visiting!  If you have a suggestion, more info for the sheet, or any other questions, feel free to email us.

LEGEND:
C.I. = Engine displacement in cubic inches, I assume converted from cubic centimeters, since Husqvarna uses the metric system primarily.
C.C. = Engine displacement in cubic centimeters
Bore = Cylinder bore in millimeters.
Stroke = Stroke in millimeters.
KW = Manufacturer rated power, in kilowatts.
H.P. = Manufacturer rated horsepower
LBS. = Weight of powerhead only (no bar, chain, fuel or oil) in our goofy weight measurement system.
Initial H = Manufacturer recommended initial setting for high speed fuel mixture
Inital L = Manufacturer recommended initial setting for low speed fuel mixure
Idle Speed = Manufacturer recommended idle speed.
Max RPM = Manufacturer recommended maximum no-load top speed (other than typically mounted bar and chain) in crankshaft revolutions per minute.

FIXED = The carburetor has a fixed (non-adjustable) jet for this fuel circuit.
NL = Not Listed (I was unable to find official published numbers)
NA = Not Applicable (ie, the 500 series of chainsaw have microprocessor controlled fuel metering, therefore do not have adjustable fuel mixture needles)

Model C.I. C.C. Bore (mm) Stroke (mm) KW H.P. LBS. Initial H Initial L Idle Speed Max RPM HCS
23 - 38 - - 1 1 2,500 11,000
36 (pre-97) - 36 38 32 - - 1 1 3,000 13,000
36 (97 & up) - 36 38 32 - - 2 1.5 3,000 13,000
40 - 40 40 32 - - 1 1 2,500 12,500
41 (pre-97) - 40 40 32 - - 1 1 3,000 13,000
41 (97 & up) - 40 40 32 - - 2 1.5 3,000 13,000
42 - 42 42 30 - 10 1 1 2,700 14,500
45 (pre-97) - 44 42 32 - - 1 1 2,500 12,500
45 (97 & up) - 44 42 32 - - 1.25 1.5 2,500 12,500
49 - 49 - - 1.25 1.5 2,500 12,500
51 3.1 51 45 32 3.1 11.4 1.25 1.25 2,500 12,500
55 3.2 53 46 32 3.4 11.4 1.25 1.25 2,500 12,500
55R 3.2 53 46 32 3.4 11.4 1.25 1.25 2,500 12,500
61 3.75 61.5 48 34 2.9 3.9 12.8 1 1 2,400 12,000
66 4.0 66.7 50 34 4.2 2,500 12,500
136 2.2 36 NL 32 2.2 10.1 2 1 1/2 3,000 13,000
137 2.2 36 NL 32 2.2 10.1 2 1 1/2 3,000 13,000
141 2.4 40 NL 32 2.6 10.1 2 1 1/2 3,000 13,000
142 2.4 40 NL 32 2.6 10.1 2 1 1/2 3,000 13,000
235 2.07 34.4 NL 32 1.8 10.3 1 1/2 1 3/4 3,000 12,000
240 2.3 38.2 NL 32 2.0 10.3 1 1/2 1 3/4 3,000 12,000
242XP 2.5 42 42 30 3.1 10.3 1 1 2,700 15,500
246 46 44 30 1 1 2,700 15,000
254XP 54 45 34 2,700 13,800
257 3.5 57 46 34 3.8 12.0 1 1 2,700 13,000
261 3.7 61.5 48 34 3.9 12.7 3/4 1 1/4 2,700 13,000
262XP 3.8 62 48 34 4.8 12.8 1 1 2,700 13,500
266 4.0 66.7 50 34 4.5 2,500 12,500
268 4.0 66.7 50 34 3.2 4.3 13.7 1 1 2,500 12,500
268K - 67 50 34 - - 1 1 2,500 10,000
272 XP 4.4 72 52 34 3.6 5.2 13.7 1 1 2,500 13,500
281 XP 4.9 81 52 38 5.7 15.0 1 1 2,500 12,500
288 XP/Lite 5.4 88 54 38 5.4 15.9 3/4 1 1/2 2,500 12,500
334T 2.1 35.2 38 31 2.0 7.5 1 1/2 1 1/2 2,800 13,800
335 XPT 2.1 35.2 38 31 2.1 7.5 3 1/2 1 3/4 2,800 13,800
336 2.1 35.2 38 31 2.0 8.4 1 1/2 1 1/2 2,800 13,800
338 XPT 2.4 39.0 40 31 2.3 7.5 1 1/2 1 1/2 2,800 13,800
339 XP 2.4 39.0 40 31 8.4 2,800 13,800
340 2.5 41 40 32 2.7 10.3 1 1 2,700 12,500
345 2.7 45 42 32 3.0 10.3 1 1 2,700 12,500
346 XP 2.7 45 42 32 3.4 10.6 1 1 2,700 14,700
350 3.01 49.4 44 32 3.1 10.6 1 1 2,700 13,000
350 EPA 3.15 51.7 45 32 10.6 2,700 13,000
351 3.0 50 44 32 3.1 10.6 1 1 2,700 13,000
353 3.2 52 45 32 3.3 11.0 1 1 2,700 13,000
357 XP 3.5 57 46 34 4.4 12.1 1 1 2,700 14,000
359 3.6 59 47 34 3.9 12.1 1 1 2,700 13,500
362 XP 3.8 62.4 47 36 4.6 13.2 3/4 1 2,700 13,500
365 4.0 65 48 36 4.6 13.2 3/4 1 1/2 2,700 12,500
371XP 4.3 70.7 50 36 5.4 13.0 3/4 1 2,700 13,500
371K 4.3 71 50 36 5.4 20.7 5/8 1 1/8 2,500 10,000
372XP 4.3 71 50 36 5.4 13.4 3/4 1 2,700 13,500
385XP 5.2 84.7 54 37 6.3 15.4 1 1/4 1 1/4 2,700 13,000
390XP 5.4 88 55 37 6.5 15.6 2,700 13,000
394XP 5.7 94 56 38 7.1 17.4 3/4 1 1/2 2,500 12,500
395XP 5.7 93.6 56 38 7.1 17.4 - - 2,500 12,500
435 2.25 37 39 31 2.1 9.7 2 2 1/2 2,900 13,000
440 2.49 40.9 41 31 2.4 9.7 2 2 1/2 2,900 13,000
445 2.78 45.7 42 33 2.7 10.8 2 2 2,700 13,000
450 3.06 50.2 44 33 3.2 11.2 2 2 2,700 13,000
455 3.38 55.5 47 32 3.4 12.8 2 1/2 1 1/2 2,700 13,500
460 3.68 60.3 49 32 12.8 2,700
545 3.06 50.1 43 34.5 3.25 10.8
550 XP 3.06 50.1 43 34.5 3.75 10.8
555 3.65 59.8 46 36 4.3 12.35 NA NA
562 XP 3.65 59.8 46 36 4.7 12.57 NA NA
570 4.1 68 49 36 4.9 14.9 2 1 1/2 - 13,500
575 XP 4.48 73.5 51 36 5.4 14.9 3 1 1/2 - 13,500
576 XP
576 XP AT
2101 56 40 12,500
3120 XP - 119 60 42 - - FIXED 1 2,500 11,000
K750 1 1/2 1/2