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Husqvarna 137poorly works at full throttle

Hi there,
I have a H-137, and for two years it worked perfectly. This year when I started it, at the idle it worked perfectly, but when I tried to saw and pressed the trigger, the saw began to gain speed much slower than usually, and then it gained speed (seemingly) much higher speed than it's nomal, and it refuses to saw -- when the chain contacts the log, the saw stops.
What's the matter?
Best regards,

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It seems to me the you have either a clutch problem or a spur gear problem.if it is the clutch the clutch drum will be blue.witch means you need to replace the clutch and drum.if it is a spur gear problem you need a new spur check it out,take the chain and bar off the look at where the chain rides in the gear.there should be no markings on the gear.if the spur gear has any dents on the gear then the gear is bad.if you are getting denting on the surface then you are over tighting the chain.this causes the chain drivers to ware also.most likely this is your problem.hope this helps,let me know if you have any more questions............

Posted on Jun 01, 2009

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Hi, Anonymous and the usual suspects are:
1. Throttle cables improperly adjusted or pinched.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
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You need to inspect the throttle mechanism at the carburetor. When you pull the throttle trigger, it should move the throttle arm to it's 'full on' stop, and when it is released, the arm should come back to the idle stop screw. If the action seems to be indefinite, take the throttle trigger mechanism apart (make notes of part placement as you go), and clean it of sawdust and dirt. Don't run the engine until the throttle is working correctly. The 'stop' switch may also be full of sawdust, or the connecting wire may be damaged. Make sure the carburetor fasteners are tight as an air leak behind the carburetor can cause engine racing. Hope this helps!

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How to assemble the chain brake on a Husqvarna 137 chainsaw

A link to a Husqvarna "IPL, 137/ 137 e, (revised 2008-04) 2006-12, Chain Saw" follows (may not be your saw):
Page 1 displays the chain brake in good detail. The hand guard must be rotated aft to latch the brake band in the expanded position or it will not be possible to reinstall the cover. It requires a fair amount of force to latch and a vise (use wooden blocks on cover flats to protect the finish) or a large C-clamp to a work surface will probably be required. (if the above is not your saw, IPL displays parts)
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – useful when downloading IPLs and Manuals
06 1500198
06 = year produced – 2006 (single digit before 2000; please contact Husqvarna for single digit clarification

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Thank You for using FixYa.

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2 Answers

When chain saw is starte it goes to full throttle.

You understand there is a fast idle start position? If your saw is new it is triggered when the choke is pulled and remians in this position (even when choke pushed in) until the throttle is advanced once. Read your warm start instructions, it says pull clutch, push clutch, start. This is why we should buy saws from a chainsaw seller/mechanic NOT Home Depot!!!
I made the mistake ONCE of attempting to start mine without the fast idle engaged... my shoulder aches just thinking about it. GL

Sep 13, 2009 | Husqvarna Garden

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