Question about Garden

1 Answer

Homelite trimmer ut20769 does not run up to speed despite the throttle being wide open. Unit starts easily and idles well. Does seem to bog down alot. Thanks

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 3,074 Answers

You can adjust the carburetor.. Tim

Posted on May 22, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Why wont my trimmer take gas after it starts ?

Open, turn ccw, the high 'H' speed jet screw about .3 of a turn while holding the throttle wide open at the trigger. Engine should increase spread andyou may have to adjust. Failing that and assuming correct oil/gas mix it will likely be carburetion, clogged fuel filter or bad fuel line.

May 02, 2014 | Husqvarna 128LD 17" Gas Trimmer

1 Answer

Chain Saws

Turn adjusting screws in all the way "gently" until they seat. Not too hard or you will damage them. Turn out 1 1/4 turns on both will get you in the ballpark to start it up. If it starts, let it warm up without going to wide open throttle for an extended period. As it is idling, turn low speed screw in until it starts to want to die down, then turn back out a little at a time until it starts to bog down, then turn it back in to the center of the two bogs (at the highest point of RPM). Throttle it from idle to WOT and it should be a steady rise in acceleration without bogging down. If it does bog on acceleration, turn the Low speed screw counterclockwise 1/8 turn at a time until bog goes away. For the high speed it is critical that you don't lean it out too far. Hold the throttle at wide open and turn the screw counterclockwise until it appears to run really rich. (Blurbs like a four stroke). Then turn the screw back in while holding WOT (wide open throttle) until you get a smooth sound with a bit of blurb every couple of seconds. Hard to explain in type rather than showing it in person, but it will get you in the right direction. I'm wondering why you are trying to adjust the carb in the first place...... If there is an issue that makes you think an adjustment will fix it, try the method above. If the adjustments don't work, or you have to adjust them A LOT, you may be in the realm of a carburetor rebuild. Be sure to check the fuel line, fuel filter, and depending on what model saw you have, the carburetor boot for splits or cracks.

Sep 21, 2012 | Homelite Garden

1 Answer

Runs at full speed only cannot adjust carb govenor at full speed

See if there is a Philips-head set screw on top of the carburetor (it is the idle speed adjusting screw) that you can turn counterclockwise backing off the idle (and possibly the wide-open throttle) speed. This is the simplest solution for you unless you wish to remove, disassemble and inspect the carb. Also, check the throttle cable to the carb, make sure it is not hanging up or binding near the engine where it connects onto the throttle plate shaft of the carb.

Sep 06, 2010 | Homelite Garden

2 Answers

My Homelite grass trimmer idles fine but when I open the throttle it stalls. How do I fix this?

Its sounds like it is running rich. Adjust your high speed adjustment screw. If the unit is older think about buying a carb rebuild kit, they run about $12.00 at your local fix it shop and if you are not in a hurry online for about $8.00 give or take S/H.

Jul 26, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

Not running at full throttle

close to the carb you will find two tiny screws. They are labeled H and L. L sets the idle speed. H sets the max RPM. Hold the throttle wide open and turn the H screw. When you find the very top end, back it down some or it will be running too lean. That would make it run hot, and provides less lubrication. Could result in engine failure if you run it too lean.

Dec 23, 2009 | Garden

3 Answers

Weedeater featherlite 25cc. runs fine for 10 mins, then bogs, dies when you rev throttle, but will idle. Almost impossible to restart, requires alot of choke. will restart after a rest. Acts just like its...

I just fixed one of these. Starts, but won't throttle up, sounds labored.
I checked compression, exhaust for carbon build up, spark, and even the carburator for bad gummed up gas. All were fine.
What I did to fix it was...
You need to remove the high and low speed adjustment screws on the Zama carb. They are blanks, and have no slot for a screw driver. I used a roll pin that the inside diameter fit snug on the outer diameter of the ajustment screw head, and turned it with a pair of needle nose pliers. I remove them (One at a time) and cut a slot in the head with a hacksaw, to allow for future adjustment. Back them both out one full turn from seated, and then tweek to get it to run. The low speed is for idle (Out to richen), and the high speed is for wide open throttle. It's closest to the air filter.

Aug 17, 2009 | Garden

1 Answer

Engine will not run wide open

you need to make sure there is not a fuel restriction first check the fuel filter, then the lines. If these seem ok then adjust the High speed rpm, there should be two adjusters one for High speed one for low speed(when the throttle is fully engaged.Do small adjustments at a time.

Jun 14, 2009 | Garden

1 Answer

I need a manual for a homelite gas hedge trimmer HT-19 I need the factory settings for the carb. bottom out screw turn out 1 1/4 turn? Have to hold throttle wide open to run.

Hello cosorio70:

You can Get a Manual from the Following Site Addy; and Fill Out the Required Information. Remember to have the UT Number if this Unit has One.
>>The Following is the Instruction File for Setting the Air Mixture Screws. Any Input is Appreciated. The Procedure is the Same for 1 or 2 Mixture Screws, Just Use the Instruction File and Skip Over the Section with the Missing Mixture Screw ( Usually the H Mixture Screw).
>>Now Setting the Air Mixture Screws:
>>****Turn the Idle Air (L) and Main Air (H) Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Set the Throttle Full Open, Start the Engine.
>>Turn the Main Air (H) Mixture Screw Clockwise Until Proper Revs are Obtained. **Carefully Use your Finger and Move the Governor Arm to Rev the Engine (on Chainsaws and Trimmers Use the Trigger to Rev the Engine) Until you Reach Max RPMs (on Chainsaws and Trimmers, the RPMs are Not Set to MAX. Set to Max and then Reverse the Setting Screw 1/4 or 1/2 Turn. If the H Mixture Screw is Set too High; the Engine will be Starved for the Oil in the Gas and Damage the Piston and Jug/Cylinder) and the Engine is Running Proper at Full Throttle Up a Grade and for Chainsaws and Trimmers they Do Not Bog DOwn Under a Load. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs.**
>>Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required.
>>Now Set the Idle Air (L) Mixture Screw so there is No Hesitation when Rapidly Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
Please, Do Not Hesitate, If I Missed Something or you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck


jbridger (John)

May 14, 2009 | Homelite Garden

2 Answers

Homelite 26bp backpack won't run up to full throttle

I have let my leaf blower run and warm up before throttling up and still it bogs down and shuts down. There is no air cleaner to clean should I just blow out the carb. and fuel lines?
It runs and idles just no high speed to blow.

Nov 16, 2008 | Homelite Consumer Products Backpack...

Not finding what you are looking for?
Garden Logo

Related Topics:

146 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garden Experts

Dennis Key
Dennis Key

Level 3 Expert

2478 Answers


Level 3 Expert

666 Answers

john h

Level 3 Expert

13723 Answers

Are you a Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides