Husqvarna 331R Workshop Manual

48 pages

Other manuals for Husqvarna 331R

Operator's Manual76 pages

Questions and Answers:

D
Daniel NealAug 21, 2025
Why is my Husqvarna Brush Cutter engine not easy to start?
- S
  Sierra LindseyAug 21, 2025
  If your Husqvarna Brush Cutter engine is hard to start, several factors could be at play. Start by checking the fuel system: the fuel filter or fuel hose might be blocked, or there could be air in the fuel pipes. Clean or replace the fuel filter, clear the fuel hose, and bleed the air from the fuel pipes. Ensure you're using the correct fuel type. Additionally, the stop screw for the throttle may not be working correctly and needs repair. The issue might also stem from the needle valve; it could be defective, worn, blocked, or have an object in its groove, or its lever arm might be damaged or not operating correctly. In such cases, replace or adjust/repair the respective components.
D
David WheelerAug 22, 2025
Why is the idle speed unstable on my Husqvarna 331R Brush Cutter?
- B
  Brianna HigginsAug 22, 2025
  If the idle speed of your Husqvarna Brush Cutter is unstable, several factors could be responsible. The stop screw for the throttle may not be operating correctly, and requires repair. Check for a blocked fuel filter or fuel hose, and clean or replace them if necessary. Air in the fuel pipes can also cause this issue, so bleed the air from them. Ensure you are using the correct fuel type. The carburetor might not be correctly attached and needs reattaching. Issues with the needle valve, such as it being defective, worn, having an object in its groove, or its spring not being correctly attached, or its lever arm not operating correctly, can also cause unstable idle speed; replace or adjust/repair the respective components.
W
William RamosAug 25, 2025
What causes my Husqvarna 331R Brush Cutter engine to stop at idle speed?
- M
  Marcus McmillanAug 25, 2025
  If your Husqvarna Brush Cutter engine stops at idle speed, several potential issues could be the cause. The stop screw for the throttle might not be working properly and needs repair. A blocked fuel filter or fuel hose could also be the culprit; clean or replace them as needed. Air in the fuel pipes can also cause the engine to stop, so bleed them. Other potential causes include a defective heat insulation seal, a defective needle valve, a damaged or incorrectly adjusted lever arm of the needle valve, a damaged or incorrectly attached needle valve spring, a worn needle valve, or an object in the needle valve groove. Replace or adjust/repair the affected components accordingly.
P
Peter Snow Jr.Aug 27, 2025
Why won't my Husqvarna 331R Brush Cutter engine increase speed?
- M
  matthewaguilarAug 27, 2025
  If your Husqvarna Brush Cutter engine is not increasing in speed, check for a blocked fuel filter or fuel hose, and clean or replace if needed. Make sure there is no air in the fuel pipes, bleed them if needed. If the needle valve is defective replace it. Ensure the carburetor is correctly attached. The lever arm of the needle valve could be damaged, too low, or not operating correctly; in such case adjust or repair/replace it. Finally, verify that the needle valve spring is correctly attached and clear the needle valve if it is blocked.
T
Terry ScottAug 28, 2025
What to do if there is no spark in my Husqvarna Brush Cutter?
- R
  rhonda43Aug 28, 2025
  If your Husqvarna Brush Cutter has no spark, make sure the spark plug is dry and clean. Also, clean the spark plug and check that the electrode gap is correct. Ensure the spark plug is installed with a suppressor. Refer to technical data for the correct electrode gap.
C
Charles McdonaldAug 29, 2025
What to do if the air filter is clogged in my Husqvarna 331R?
- S
  sheila08Aug 29, 2025
  If the air filter in your Husqvarna Brush Cutter is clogged, clean the air filter.
S
Scott MerrittAug 31, 2025
What to do if the starter pawls are not working on my Husqvarna Brush Cutter?
- R
  Rachel CookAug 31, 2025
  If the starter pawls are binding on your Husqvarna Brush Cutter, adjust or replace the pawls. Also, clean around the pawls.
T
Tamara LewisSep 2, 2025
Why won't my Husqvarna Trimmer start? (Stop button issue)
- V
  vsimpsonSep 2, 2025
  To solve the stop button issue on your Husqvarna Trimmer, set the stop switch to the start position.
I
Isabel BishopSep 4, 2025
Why is my Husqvarna 331R performing poorly at high speed?
- B
  Billy ArcherSep 4, 2025
  If your Husqvarna Brush Cutter shows unsatisfactory performance at high speed, several issues could be the cause. Check for a blocked fuel filter or fuel hose, and clean or replace them as needed. Also, ensure there is no air in the fuel pipes by bleeding them. Verify that you are using the correct fuel type. The carburetor might not be attached correctly and needs reattaching. Problems with the needle valve, such as it being defective, worn, or having a damaged or incorrectly attached spring, or an object in its groove, or its lever arm being damaged or not operating correctly, can also lead to poor performance. Replace or adjust/repair the affected components accordingly.
T
tpalmerSep 5, 2025
Why does my Husqvarna 331R engine stop when I decrease the speed?
- B
  bradfordkimberlySep 6, 2025
  If the engine of your Husqvarna Brush Cutter stops when the speed is decreased, it could be due to the lever arm of the needle valve being too high or not operating correctly, requiring adjustment or repair. Alternatively, the needle valve might be worn and needs replacement, or there could be an object in the needle valve groove that needs to be removed.

Husqvarna 331R Specifications

General

Engine Type	2-stroke
Weight	5.2 kg
Sound Pressure Level	94 dB(A)
Fuel Tank Volume/Capacity	0.5 L
Recommended Cutting Equipment	Grass blade, trimmer head
Engine Displacement	30.1 cm³

Related product manuals

Preview: Husqvarna 326R

Preview: Husqvarna 345FR

Husqvarna 345FR

Husqvarna 355RX

Preview: Husqvarna 323RJ

Husqvarna 323RJ

Preview: Husqvarna 355FX

Husqvarna 355FX

Preview: Husqvarna 324LX

Husqvarna 324LX

Husqvarna 355FXT

Husqvarna 326HD60

Husqvarna 327P5X-series

Husqvarna 325RJX Series

Preview: Husqvarna 125R

Preview: Husqvarna 232R