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Description
2-Piece On/Off Kill Switch 503717901 for Husqvarna ChainsawsReplacement part number: 503717901, 503717901, 503089701, 503 08 97 01, 501815201, 501633801, 503089702 Application: Fit For Following Models: 238 (1986 10) Ignition Flywheel 238 (1987 04) Ignition Flywheel 238 (1987 11) Ignition Flywheel 242 (1987 06) Ignition Flywheel 242 (1989 05) Ignition Flywheel 254 (1986 04) Ignition Flywheel 254 (1987 01) Ignition Flywheel 254 (1988 02) Ignition Flywheel 266 (1987 11) Crankcase Assembly 268 (1987 05) Crankcase
Replacement part number:
503717901, 503717901, 503089701, 503 08 97-01, 501815201, 501633801, 503089702
Application:
Fit For Following Models:
238 (1986-10) Ignition/Flywheel
238 (1987-04) Ignition / Flywheel
238 (1987-11) Ignition/Flywheel
242 (1987-06) Ignition / Flywheel
242 (1989-05) Ignition/Flywheel
254 (1986-04) Ignition/Flywheel
254 (1987-01) Ignition / Flywheel
254 (1988-02) Ignition/Flywheel
266 (1987-11) Crankcase Assembly
268 (1987-05) Crankcase Assembly
268 (1987-11) Crankcase Assembly
281 (1986-12) Ignition / Flywheel
281 (1988-01) Ignition/Flywheel
288 (1988-01) Ignition/Flywheel
3120 (1988-05) Ignition/Flywheel
3120 (1989-02) Ignition/Flywheel
50 (1987-06) Ignition/Flywheel
50 (1988-03) Ignition/Flywheel
61 (1987-11) Crankcase/Tank Assembly
66 (1987-06) Crankcase Assembly
136 (2001-05) Ignition Switch
136 (2003-01) Ignition/Flywheel
136 (2003-06) Starter & Ignition / Flywheel & Fuel Tank / Handle & Throttle Control
136 (2004-01) Ignition / Flywheel
141 (2001-05) Ignition Switch
141 (2003-01) Ignition/Flywheel
141 (2003-06) Starter & Ignition / Flywheel & Fuel Tank / Handle & Throttle Control
141 (2004-01) Ignition / Flywheel
36 (1997-07) Starter, Ignition, Tank Assembly And Throttle Trigger Kit
41 (1997-07) Starter, Ignition, Tank Assembly And Throttle Trigger Kit
136 (2001-09) Ignition/Flywheel
141 (2001-09) Ignition/Flywheel
254 (2001-09) Ignition/Flywheel
281 (1997-12) Ignition / Flywheel
281 (2000-02) Ignition/Flywheel
281 (2001-10) Ignition/Flywheel
288 (1997-12) Ignition / Flywheel
288 (2000-02) Ignition/Flywheel
288 (2001-10) Ignition/Flywheel
288 EPA (1997-12) Ignition / Flywheel
288 EPA (2000-02) Ignition/Flywheel
288 EPA (2001-10) Ignition/Flywheel
3120 (2001-09) Ignition / Flywheel
3120 K (2001-06) Ignition/Flywheel
3120 XP (2003-11) Ignition / Flywheel
3120 XP EPA (2003-11) Ignition / Flywheel
394 (1996-01) Ignition/Flywheel
395 (2001-01) Ignition/Flywheel
395 (2003-10) Ignition / Flywheel
395 (2005-05) Ignition / Flywheel
395 EPA (2001-01) Ignition/Flywheel
395 EPA (2003-10) Ignition / Flywheel
395 EPA (2005-05) Ignition / Flywheel
55 (2006-02) Ignition / Flywheel
55 EU1 (2006-02) Ignition / Flywheel
55 Rancher (EPA) (2006-02) Ignition / Flywheel
55 Rancher EPA (1998-08) Ignition / Flywheel
55 Rancher EPA (2000-05) Ignition / Flywheel
55 Rancher EPA (2004-01) Ignition / Flywheel
136 (1998-09) Ignition/Flywheel
136 LE (2004-03) Recommended Parts, Accessories, Lubricants
137 (2004-10) Recommended Parts, Accessories, Lubricants
137 e (2004-10) Recommended Parts, Accessories, Lubricants
141 (1998-09) Ignition/Flywheel
141 LE (2004-05) Recommended Parts, Accessories, Lubricants
142 (2004-10) Recommended Parts, Accessories, Lubricants
142 e (2004-10) Recommended Parts, Accessories, Lubricants
242 (1998-05) Ignition/Flywheel
242 (1998-06) Ignition/Flywheel
246 (1994-12) Ignition/Flywheel
254 (1996-01) Ignition/Flywheel
254 (1998-03) Ignition/Flywheel
257 (1996-01) Ignition/Flywheel
257 (1998-03) Ignition/Flywheel
257 (2001-09) Ignition / Flywheel
261 EPA (1998-03) Ignition/Flywheel
261 EPA (1999-06) Ignition/Flywheel
262 (1996-01) Ignition/Flywheel
268 (1997-01) Crankcase Assembly
268 K (1997-01) Crankcase
272 K (1997-01) Crankcase
272 S (1995-12) Crankcase Assembly
272 S (1997-01) Crankcase
272 XP (1997-01) Crankcase
3120 (1996-01) Ignition/Flywheel
3120 (1998-03) Ignition/Flywheel
3120 (2000-02) Ignition/Flywheel
3120 EPA (1998-03) Ignition/Flywheel
3120 EPA (2000-02) Ignition/Flywheel
3120 K (1999-04) Ignition/Flywheel
3120 K (2000-02) Ignition/Flywheel
3120 K EPA (2000-02) Ignition/Flywheel
385 (EPA) (2005-03) Recommended Parts, Accessories, Lubricants
394 EPA (1998-03) Ignition/Flywheel
395 (EPA) (2007-01) Ignition/Flywheel
42 (1994-12) Ignition/Flywheel
51 (1998-06) Ignition / Flywheel
51 (2000-05) Ignition / Flywheel
51 EPA (1998-06) Ignition / Flywheel
51 EPA (2000-05) Ignition / Flywheel
55 (1998-06) Ignition / Flywheel
55 (2000-05) Ignition / Flywheel
55 (2007-02) Ignition/Flywheel
55 EPA (1998-06) Ignition / Flywheel
55 EPA (2000-05) Ignition / Flywheel
55 EU1 (2007-02) Ignition/Flywheel
55 Rancher (2007-02) Ignition/Flywheel
61 (1997-01) Crankcase
136 LE (2004-03) Ignition/Flywheel
136 LE (California) (2001-06) Ignition / Flywheel
137 (2004-10) Ignition/Flywheel
137 (2005-03) Ignition / Flywheel
137 (2005-09) Ignition/Flywheel
137 (2006-01) Ignition / Flywheel
137 (2006-12) Ignition/Flywheel
137 e (2004-10) Ignition/Flywheel
137 e (2005-03) Ignition / Flywheel
137 e (2005-09) Ignition/Flywheel
137 e (2006-01) Ignition / Flywheel
137 e (2006-12) Ignition/Flywheel
141 LE (2004-05) Ignition / Flywheel
142 (2004-10) Ignition/Flywheel
142 (2005-03) Ignition/Flywheel
142 (2005-09) Ignition/FlyWheel
142 (2006-01) Ignition & Flywheel
142 (2006-12) Starter and Ignition/ Flywheel and Throttle Assy. and Fuel Tank/ Handles
142 e (2004-10) Ignition/Flywheel
142 e (2005-03) Ignition/Flywheel
142 e (2005-09) Ignition/FlyWheel
142 e (2006-01) Ignition & Flywheel
142 e (2006-12) Starter and Ignition/ Flywheel and Throttle Assy. and Fuel Tank/ Handles
181 (1983-06) Ignition/Flywheel
181 (1983-12) Ignition/Flywheel
181 (1984-02) Ignition/Flywheel
181 (1985-03) Ignition/Flywheel
181 (1985-06) Ignition/Flywheel
266 (1982-12) Crankcase Assembly
266 (1984-10) Crankcase Assembly
266 (1985-01) Crankcase Assembly
266 (1985-06) Crankcase Assembly
266 (1986-01) Crankcase
266 (1986-04) Crankcase
266 (1986-12) Crankcase Assembly
40 (1984-12) Ignition/Flywheel
40 (1985-05) Ignition/Flywheel
40 (1985-09) Ignition/Flywheel
40 (1986-01) Ignition/Flywheel
40 (1986-12) Ignition/Flywheel
40 (1987-01) Ignition/Flywheel
40 (1988-02) Ignition/Flywheel
45 (1987-01) Ignition/Flywheel
45 (1988-02) Ignition/Flywheel
61 (1983-09) Crankcase Assembly
61 (1984-01) Crankcase & Tank Assembly
61 (1984-10) Crankcase And Tank Assembly
61 (1985-06) Crankcase Assembly
61 (1986-03) Crankcase Assembly
61 (1986-12) Crankcase Assembly
61 (1987-11) Crankcase/Tank Assembly
61 (1988-06) Crankcase Assembly
266 (1984-08) Crankcase Assembly
133 (1980-10) Ignition/Flywheel
133 (1981-12) Ignition/Flywheel
154 (1983-05) Ignition/Flywheel
154 (1983-11) Ignition/Flywheel
154 (1984-10) Ignition/Flywheel
154 (1985-08) Ignition/Flywheel
234 (1983-01) Ignition/Flywheel
234 (1984-04) Front/Handle/Ignition/Flywheel
238 (1984-01) Front/Handle/Ignition/Flywheel
238 (1985-05) Front/Handle/Ignition/Flywheel
238 (1985-11) Front/Handle/Ignition/Flywheel
238 (1986-02) Ignition/Flywheel
281 (1986-01) Ignition/Flywheel
50 (1985-02) Ignition/Flywheel
50 (1986-06) Ignition/Flywheel
50 Rancher (1983-01) Ignition/Flywheel
50 Rancher (1983-11) Ignition / Flywheel
242 (1990-01) Ignition/Flywheel
242 (1994-04) Ignition/Flywheel
254 (1990-05) Ignition/Flywheel
254 (1992-10) Ignition/Flywheel
254 (1994-06) Ignition/Flywheel
257 (1994-06) Ignition / Flywheel
262 (1990-03) Ignition/Flywheel
262 (1991-03) Ignition/Flywheel
262 (1992-11) Ignition/Flywheel
266 (1988-06) Crankcase Assembly
266 (1989-02) Crankcase Assembly
266 (1990-01) Crankcase
268 (1989-02) Crankcase Assembly
268 (1990-05) Crankcase
268 (1991-02) Crankcase
268 (1993-09) Crankcase
268 K (1989-01) Crankcase
268 K (1991-04) Crankcase
268 K (1991-09) Crankcase Assembly
268 Special (1991-02) Crankcase
272 (1993-01) Crankcase
272 K (1991-09) Crankcase Assembly
281 (1988-08) Ignition/Flywheel
281 (1989-02) Ignition/Flywheel
281 (1990-01) Ignition/Flywheel
281 (1991-04) Ignition/Flywheel
281 (1993-09) Ignition/Flywheel
288 (1988-08) Ignition/Flywheel
288 (1989-02) Ignition/Flywheel
288 (1990-01) Ignition/Flywheel
288 (1991-04) Ignition/Flywheel
288 (1993-09) Ignition/Flywheel
3120 (1990-01) Ignition/Flywheel
3120 (1994-06) Ignition / Flywheel
36 (1991-06) Ignition/Flywheel
36 (1994-05) Ignition/Cylinder
394 (1994-01) Ignition / Flywheel
41 (1991-06) Ignition/Flywheel
41 (1994-05) Ignition/Cylinder
42 (1992-03) Ignition / Flywheel
42 (1994-04) Ignition/Flywheel
50 (1989-01) Ignition/Flywheel
50 Special (1990-01) Ignition/Flywheel
51 (1990-01) Ignition/Flywheel
51 (1991-10) Ignition/Flywheel
51 (1994-06) Ignition/Flywheel
55 (1990-01) Ignition/Flywheel
55 (1991-10) Ignition/Flywheel
55 (1994-06) Ignition/Flywheel
61 (1988-06) Crankcase Assembly
61 (1989-02) Crankcase Assembly
61 (1991-03) Crankcase
66 (1988-08) Crankcase Assembly
66 (1989-02) Crankcase/Tank Assembly
66 (1991-03) Crankcase
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 17 reviews
Sort
Product Reviews
★★★★★ 5
Great socks!
Size: Large, Color: (001) Black / Black / White
These fit true to size. Good socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026
★★★★★ 5
Great for walking all day at work as well
Size: X-Large, Color: (001) Black / Black / White
I walk approximately 10 miles a day at work, in a manufacturing setting. On concrete with steel toe shoes. My feet have been begging me to change from the socks that I have worn for years. I have worn these other name brand socks for probably 10 years. So, change was obviously something I had to be pushed into. I got on Amazon and searched for training socks. I read the description. Glanced at the reviews. I decided to move forward with purchasing these. I could not have been happier. My feet began feeling better immediately. And the priced was very reasonible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
★★★★★ 5
You have one pair of feet. Treat them kindly with a pair of UA socks
Size: Large, Color: (100) White / White / Black
Soft and tough. Easy on the feet. Nice fit prevents sore spots and blisters.
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Reviewed in the United States on December 3, 2025
★★★★★ 5
Excellent all-poly athletic socks for general lifting and HIIT.
Size: Medium, Color: Black/White/Grey
***These are NOT “low” -cut socks as the description in the title states. These are actually “quarter”-cut socks as clearly visible in the picture of the sock itself. “Low” -cut socks are shorter than this height but still visible with a shoe. Also, on the actual UA package of these socks, it clearly states these are QUARTER cut socks.
My review: Gave these UA Performance Tech socks (UAPT) 5 stars since they’re very good but in all reality not the best socks I’ve ever had for lifting and HIIT workouts. That title goes to Nike Dri-Fit MAX socks (DFM)….but these socks are really good. Like Nike’s DFM’s, these UAPT socks come in sizes, halleluah (M, L, and XL). The idea that most athletic sock are sized 6-12 and should therefore fit everyone perfectly is absolutely ridiculous. Your shoes come in whole and half sizes…so socks should at the very least be sized like these UAPT’s and Nike DFM’s…in S/M/L or in this case, M/L/XL. I wear a men’s size 8 shoe and the M (medium) size in these socks was a perfect fit; true to size.
Also, UAPT socks are ALL polyester with Spandex which is ideal and 100% that which you want for athletic socks: wicking with stretch. Cotton socks are the absolute worst thing you could wear to the gym since they’re sponges for sweat and therefore get wet and heavy, cause blisters, tend to stink, stick to skin, etc… IF you prefer cotton socks for athletics, then you don’t understand how performance fabrics work in athletics and training. You do NOT want cotton in your athletic apparel. You want your fabrics that wick sweat away; NOT soak up sweat and hold onto it. Also, the flexibility and stretch of the foot and ankle parts of the sock were both just right. Snug but not too tight. Wicking is perfect, too. Already worn during two 3 1/2 hour workouts and my feet stayed as dry as a desert.
When looking for UA athletic socks on Amazon, I surprisingly continued to find UA “athletic” socks made with mostly cotton which completely surprised me because a serious athletic company should produce an abundance of performance-level socks… i.e. all-poly socks. Thank goodness I finally came across these UA all-poly Performance Techs. The only drawback to these UAPT’s…and it’s a minor drawback…is that unlike Nike DFM’s, these do not come in L & R (left and rights) to specifically match the individual foot shape. Nike DFM socks come in L and R which sets them apart from all other athletic socks…and yet I don’t like supporting a massive monopolistic athletic apparel company like Nike, but they’re the only one that makes THE best athletic sock.
Nonetheless, these UAPT’s are perfect workout/HIIT/lifting socks for the bundle value price of six pair and three colors. If you’re looking to match your new UA or Rock shoes with the appropriate UA athletic sock, then here you go. I chose the black/white/gray mix bundle since I have new pairs of a black and a white version of the same UA-Rock shoe. These UAPT socks are medium thickness so they didn’t take up an exorbitant amount of room in my shoes but they’re thick enough to prevent blisters and provide cushion. Overall they’re very comfortable, hold a good stretch, hold their shape, and seem to be durable but only time will tell.
And since we’re on the black and white sock subject, I couldn’t resist: I read a shoe review about someone angered that his new UA/Rock black shoes (obviously bought for casual wear in lieu of gym use) staining his white cotton socks. First of all, never ever wear white socks (much less cotton white socks) with black athletic shoes! The possibility of staining is always there and the appearance just doesn’t work. However, you can get away with black socks with white shoes in some cases…but never white socks with black shoes. Why? Who knows? It’s just one of those unwritten rules of the gym. And no, I didn’t make the rules…so don’t blame the messenger. LOL!
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Reviewed in the United States on July 28, 2025
★★★★★ 5
Very soft and wears well
Size: Medium, Color: Black/White/Grey
Very nice quality and soft
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Reviewed in the United States on April 18, 2026