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#Post#: 90874--------------------------------------------------
Husqvarna service bulletin info 350 351 353 346 357 359
By: Chainsawrepair Date: September 21, 2024, 7:07 am
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350
New number series, year is first two digits before serial
number.
99 0200751 - SB B9901016; New ignition module with improved
moisture protection (503 96 24-04).
99 4702251 - SB B0000018; New single-unit chain tensioner.
00 0200751 - SB B0000017; New ignition module (503 96 24-06).
00 3604562 - SB B0000034; New air filter with better fit to air
horn.
00 3800001 - SB B0000033; New stronger clutch springs. Painted
black.
00 4102901 - SB B0100031; New clutch cover (537 10 78-01) marked
"AB" inside.
01 0702451 - SB B0100029; New starter (537 10 47-01).
01 2303701 - SB B0200015; New Viton crank bearing holder. Brown
color instead of black.
01 4003501 - SB B0200009; New SEM ignition module (537 16
21-01).
01 4501701 - SB B0200019; New throttle bellows (537 14 65-01).
02 2600001 - SB B0200048; Walbro HDA 196 (EPA) carburetor
introduced.
02 3106101 - SB B0200048; Walbro HDA 195 (non-EPA) carburetor
introduced.
02 3801301 - SB B0200055; Zama C3-EL18 (EPA) carburetor
introduced.
03 0506301 - SB B0300006; New starter cover with additional ribs
(537 10 47-02).
03 1306122 - SB B0300025; New clutch cover marked "AG" inside
for less lateral clutch movement.
03 4106001 - SB B0300053; Metric cylinder screws replace PL
screws.
03 4800001 - SB B0400001; Exhaust heat deflector for 350 EPA
models.
04 0700001 - SB B0400027; New ignition module (537 16 21-04).
#Post#: 90875--------------------------------------------------
Re: Husqvarna service bulletin info
By: Chainsawrepair Date: September 21, 2024, 7:10 am
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346
99 3901181 - SB B0000029; New Walbro HDA 182A carburetor for XPG
model. Eliminates hesitation on acceleration.
99 4200501 - SB B0100027; New crankcase with larger holes for
movement limiters with new screws. New screws will not fit older
crankcases.
99 4500081 - SB B0000018; New single-unit chain tensioner.
00 2000002 - SB B0000017; New ignition module (503 96 24-06).
00 3400611 - SB B0100026; New clutch drum (503 98 00-71).
00 3800001 - SB B0000032; New brake handle is 2mm longer and
stronger.
00 3800001 - SB B0000033; New stronger clutch springs. Painted
black.
00 4100001 - SB B0100031; New clutch cover (537 10 78-01) marked
"AB" inside.
01 0700001 - SB B0100029; New starter (537 10 47-01).
01 4500401 - SB B0200019; New throttle bellows (537 14 65-01).
01 4900401 - SB B0200009; New SEM ignition module (537 16
21-01).
02 0500401 - SB B0200039; New reinforced crankcase, marked
inside "AA" on clutch side & "Z" on flywheel side.
02 0800001 - SB B0200020; New, reinforced clutch (537 11 05-01).
02 2600001 - SB B0200048; Walbro HDA 196 (EPA) carburetor
introduced.
02 3300001 - SB B0200077; New carburetor base (casting code "H")
to prevent fuel line kinking.
02 3700001 - SB B0200055; Zama C3-EL18 (EPA) carburetor
introduced.
02 4100601 - SB B0200070; Walbro HDA 197 carburetor introduced.
02 4103601 - SB 03000003; Zama C3-EL17 replaces Walbro HDA 197.
02 4900701 - SB B0300007; Strengthened front heated handle for
346XPG (503 90 93-03).
03 0500001 - SB B0300006; New starter cover with additional ribs
(537 10 47-02).
03 0500001 - SB B0300027; Metric crankcase screws replace PL
screws.
03 1300241 - SB B0300025; New clutch cover marked "AG" inside
for less lateral clutch movement.
03 2500001 - SB B0300028; New muffler support (503 94 19-01).
03 4100201 - SB B0300052; New air filters to reduce mounting
wear.
03 4200001 - SB B0300053; Metric cylinder screws replace PL
screws.
04 0600601 - SB B0400027; New ignition module (537 16 21-04).
#Post#: 90876--------------------------------------------------
Re: Husqvarna service bulletin info
By: Chainsawrepair Date: September 21, 2024, 7:16 am
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351
99 0400001 - SB B9901016; New ignition module with improved
moisture protection (503 96 24-04).
99 0699999 - SB B9900011; Last copy with old brake handle design
99 0700001 - SB B9900011; New brake handle design. Now same as
346XP.
99 4400251 - SB B0100027; New crankcase (503 85 69-75) with
larger holes for movement limiters with new screws (503 21
51-01). New screws will not fit older crankcases.
99 5000006 - SB B0000018; New single-unit chain tensioner.
00 2000002 - SB B0000017; New ignition module (503 96 24-06).
00 3400001 - SB B0100026; New clutch drum (503 98 00-71).
00 3600001 - SB B0000034; New air filter with better fit to air
horn.
00 3500501 - SB B0000032; New brake handle is 2mm longer and
stronger.
00 3800001 - SB B0000033; New stronger clutch springs. Painted
black.
00 4200601 - SB B0100031; New clutch cover (537 10 78-01) marked
"AB" inside.
01 0500001 - SB B0100029; New starter (537 10 47-01).
01 4700001 - SB B0200019; New throttle bellows (537 14 65-01).
02 0200001 - SB B0200009; New SEM ignition module (537 16
21-01).
02 0200001 - SB B0200017; New Husqvarna-made cylinder with
smaller transfers. Security-torx screws hold transfer caps on.
02 0700001 - SB B0200039; New reinforced crankcase, marked
inside "AA" on clutch side & "Z" on flywheel side.
02 0800001 - SB B0200020; New, reinforced clutch (537 11 05-01).
02 2600001 - SB B0200048; Walbro HDA 196 (EPA) carburetor
introduced.
02 3200001 - SB B0200055; Zama C3-EL17 (non-EPA) carburetor
introduced.
02 3200001 - SB B0200077; New carburetor base (casting code "H")
to prevent fuel line kinking.
02 3700001 - SB B0200055; Zama C3-EL18 (EPA) carburetor
introduced.
353/353G.
02 4900800 - SB B0300007; Strengthened front heated handle for
353G (503 90 93-03).
02 5000905
03 0500001 - SB B0300006; New starter cover with additional ribs
(537 10 47-02).
03 0500501 - SB B0300027; Metric crankcase screws replace PL
screws.
03 1400001 - SB B0300025; New clutch cover marked "AG" inside
for less lateral clutch movement.
03 2500001 - SB B0300028; New muffler support (503 94 19-01).
03 4200001 - SB B0300052; New air filters to reduce mounting
wear.
03 4200001 - SB B0300053; Metric cylinder screws replace PL
screws.
04 0700001 - SB B0400027; New ignition module 537 16 21-04
13-0500231 - DDD80
22 1400866 - (965 16 97-98)
357XP/XPG.
First ones have smaller 13mm wide connecting rod. (See Service
Bulletin B0200011 below.)
01 4100301 - SB B0200009; New SEM ignition module (537 16
21-01).
02 0700001 - SB B0200011; New 15mm wide connecting rod requires
new cylinder, piston, and piston pin. Previous 13mm wide
connecting rod (along with older cylinder, piston and piston
pin) is not forward compatible.
02 2301201 - SB B0200054; Walbro HDA 198 (non-EPA) & HDA 199
(EPA) carburetors introduced.
02 4602000 - SB B0300011; New throttle bellows (537 14 65-01).
02 4901428 - SB B0300006; New starter cover with additional ribs
(503 93 06-02).
03 0500001 - SB B0300027; Metric crankcase screws replace PL
screws.
03 0600001 - SB B0300024; New smaller chain catcher to reduce
crankcase breakage (503 88 63-01).
03 1000348 - SB B0300033; Auto De-comp introduced.
03 1000442 - SB B0300025; New clutch cover marked "AG" inside
for less lateral clutch movement.
03 4200401 - SB B0300050; Metric carburetor screws replace PL
screws.
03 4700001 - SB B0400002; Reinforced clutch side of crankcase.
Casting code "U".
03 4700001 - SB B0400034; New chain catcher kit to go with
reinforced crankcase above (537 40 30-01).
04 0600401 - SB B0400027; New ignition module (537 16 21-04).
05 4400165 - Auto decomp removed; (965 55 11-00) XPG
359.
01 4200001 - SB B0200009; New SEM ignition module (537 16
21-01).
02 2100336 - SB B0200054; Walbro HDA 198 (non-EPA) & HDA 199
(EPA) carburetors introduced.
02 4500643 - SB B0300011; New throttle bellows (537 14 65-01).
02 5001387 - SB B0300006; New starter cover with additional ribs
(503 93 06-02).
03 0500048 - SB B0300027; Metric crankcase screws replace PL
screws.
03 0600001 - SB B0300024; New smaller chain catcher to reduce
crankcase breakage (503 88 63-01).
03 1500001 - SB B0300025; New clutch cover marked "AG" inside
for less lateral clutch movement.
03 4200901 - SB B0300050; Metric carburetor screws replace PL
screws.
03 4700001 - SB B0400002; Reinforced clutch side of crankcase.
Casting code "U".
03 4700001 - SB B0400034; New chain catcher kit to go with
reinforced crankcase above (537 40 30-01).
04 0700001 - SB B0400027; New ignition module (537 16 21-04).
#Post#: 90877--------------------------------------------------
Re: Husqvarna service bulletin info 350 351 353 346 357 359
By: Chainsawrepair Date: September 21, 2024, 7:17 am
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There was also 340 345 SB listed but I see no need for those
#Post#: 91607--------------------------------------------------
Re: Husqvarna service bulletin info 350 351 353 346 357 359
By: ckuo Date: August 27, 2025, 3:36 am
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The Husqvarna service bulletin updates for models 350, 351, 353,
346, 357, and 359 detail a range of improvements over the years,
including upgraded ignition modules with better moisture
protection, stronger clutch springs, improved starters, new air
filters, and redesigned clutch covers for stability. Notably, in
2001 a new Viton crank Agricultural bearing
HTML https://en.tradebearings.com/clist_2.html
holder was introduced,
changing from black to brown for better durability and sealing,
showing Husqvarna’s focus on enhancing reliability and longevity
of critical components like TBS bearings
HTML https://www.tradebearings.com
in these saws.
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