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Jonsered gt26l engine cuts out when hot

Have adjusted idle mix, it starts first pop. adjusted high speed mix to what seems optimal, it will rev with minimal lag before revving to max but after a while it starts losing revs and flames out. it does'nt sound like it is starving for fuel as there is no increase in revs before it stops more like a slow decrease in revs till it stops.

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 246 Answers

SOURCE: Need to adjust fuel and air mix to start trimmer.

Hello gwturley201:

I am Including the Carburetor Adjustment File Also.
From your Description it Sounds like the Exhaust Port or Muffler is Restricted with Carbon Deposits, the Carburetor Metering Pump Actuator Gap is Incorrect.
>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
Is the Fuel Line from the Fuel Filter Staying Full of Fuel?
The Carburetor Metering Jet Actuator is Set so the Pump Diaphram Dowl is Just Touching the Actuator Arm. These Components are Located Under the Cover with 4 Small Screws Holding it to the Carburetor Body.
>>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 or for Chainsaws and Trimmers; they Operate without Bogging Down. 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 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

Respectfully

jbridger (John)

Posted on May 13, 2009

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#1 Taper
  • 1040 Answers

SOURCE: Weedwacker stalls when accelerating

Check the fuel lines for cracks/breaks. If they are o.k., then:

You willneed to disassemble the carburetor and spray with carb.cleaner. Makesure the small screen is free of debris.(Should be able to see daylightthrough it.)

Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152),to clean the small portals in carb. These portals can become blocked. Reassemble and start.

If the carb. parts are more than 4 years old, you may have to replace them.

If you need further assistance, just let me know.

Jim

Posted on Jun 25, 2009

  • 5 Answers

SOURCE: I have a Echo Weed Eater, it starts and runs, but won't rev up

you can take the screen out altogether-ive done that for almost 20 years.That is probably your problem.You can also change the fuel filter in the gas tank.There is usually enuf slack in the gas line in the tank that you can get the filter to the gas tank opening and hold it w your fingers or pliers and remove it.Be careful with pliers to not gouge fuel line and just pull filter firmly off fuel line.There may be a tiny metal ring that helps hold fuel filter on to fuel line.Try to kind of hold it in place as you pull filter out of fuel line.If you lose it its not a big deal.Most filters fit snug onto a fuel line anyway.-A good way to get the filter to the mouth of the gas tank to work on is to empty all the gas and take a metal clothes hanger and bend it so you get a little hook in it and kinda "fish" for the fuel line w filter attatched.Within minutes you'll figure it out and get the filter up to the mouth of the gas tank where you can work on it.If you dont have enuf slack to work you can disconnect the fuel line at the carb and pull yourself a little slack.Dont go more than about 1/2 -3/4 inch though.----along w the muffler screen(located behind plate that is attatched to muffler with 3 small screws)(check plate itself for ability for air to pass thru-can clean it out with tiny screwdriver)-you can also take entire muffler off(two allen screws)that reveals a look at port where all the exaust comes from.If that area is choked with carbon you'll have a problem.Some weedeatwers get it bad some dont.So...check clean or remove(screens clog up fast) muffler screen located under plate thats attatched to muffler-----while plate is off check it for carbon buildup(you can hold up to the sun and see if sunlight goes thru it-that will tell you)-------take muffler off and look at exaust port(if dirty scrape carbon carefully out-turn machine upside down,tap with something,etc...no biggy)-----fuel filter.Also check air filter though probably not your problem unless its totally caked with stuff or getting soaking wet somehow.The only two main other things would be a plug or the thing attatched to one of the gas lines called a vent-just a little thing that pops on to the end of a line.I dont think the air filter ,vent,or plug is your problem-especially the vent or air filter.Its probably exaust related or fuel filter.---make sure youre gas mixture is right and make sure the gas isnt real old.---Ive had echos for 20 years-hope it wasnt too much to digest.Its all simple really-was just tryin to be descriptive to help u as much as possible.good luck

Posted on Jun 29, 2010

  • 63 Answers

SOURCE: TB465SS trimmer won't rev up

change spark plug and check the gap between points

Posted on Jul 24, 2010

hunter19_46m
  • 7482 Answers

SOURCE: my homelite f3040 starts but wont run / when i

Check your fuel filter in the fuel tank,if you have one.
If the mower/weedeater is over a year old, then I recommend that you buy
and install a new carburetor repair kit,because the diaphragm will get hard
and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor
internal rubber parts like the diaphgram and O rings.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small
rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid
and letting it run a few times like that and it will flush the gunk out of
the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to
reassemble the carburetor or follow the instructions you get with the
carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need
to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes
to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first
and then turn them back out to their orginal position before you started.
This is a FREE answer,Please rate me

Posted on Dec 05, 2010

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1 Answer

WEED TRIMMER CARBURETTOR ADJUSTMENT


Three screws. On some, there are only two screws. Some have only one screw. A few have none at all.

If there are any screws, one is nearly guaranteed to be an idle mix adjustment. With the engine warmed up & idling, turn that screw in (clockwise) 1/4 turn at a time until you can hear the idle speed drop a little. Back it out 1/4 turn and leave it alone. If the first 1/4 turn drops the idle speed, turn it OUT 1/4 turn and see if the idle speed rises more. When you get idle speed that stays the same when you make a 1/4-turn adjustment, go back to the beginning if this paragraph and repeat the first part.

If there are two or three screws, the next screw may be either an idle speed screw or a high mix screw. If it's an idle speed screw, turning it in 1/4 turn will immediately RAISE the idle speed and turning it out will LOWER the idle speed. Adjust that screw until the string head (that cuts weeds) isn't quite turning at engine idle. If it's a high mix screw, its only effect will be at full engine speed. If the engine sounds throaty, turn that screw in 1/4 turn at a time at full engine speed At some magical point, the engine sound should turn brassy. If you turn the screw in past that point, the engine will lose power because it's running too lean.

If there are three screws, then you have all three - idle mix, idle speed, and high mix.

There may be markings near the screws to identify them. Each manufacturer marks them differently, if at all. Some manufacturers simply rely on the screws' locations to indicate what they do. It'll be up to you to figure out which is which and make notes accordingly.

Aug 01, 2014 | Ryobi Garden

1 Answer

Saw will start but will not idle


Someplace near the carburetor should be an idle mix screw and an idle speed screw. There may also be a high-speed mix screw. Try turning the idle speed screw in 1/4-turn at a time until it idles. If you turn it too far, the clutch will always be engaged so the blade will never stop.

Once you get it to idle, adjust the idle mix screw in or out 1/4-turn at a time until it idles at the highest speed. Turn the mix screw in JUST until the idle speed starts to drop a little, then back it out 1/4 turn.

Now adjust the idle speed screw again until it idles smoothly at a low enough speed that the blade stops.

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Generally this is a fuel / air ratio problem. Usually it can be solved by a carb adjustment. On the carb there are usually two screws, one marked low or L , the other marked high or H. Low is your adjustment for idle mixture, high is for mixture at full throttle. The saw should Always be adjusted to run well during the cut. Make adjustments a little at a time, then try The saw. Continue small adjustments untill the saw is performing well at full throttle while Cutting.

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1 Answer

How far does the high and low screw need to be unscrewed or screwed in on the carburetor. of the chair saw


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1 Answer

Need intructions on carberator adjustments for mac-3514 35cc/cm3 runs but hard to start after using it for few minutes.


There is a low speed jet and high speed. Low speed sets the idle or stays running without feathering the throttle./// When setting high speed, hold the throttle wide open until engine revs high, then turn back in(at least ΒΌ turn) to slow the engine which in turn gives the engine more gas and runs cooler. If you have it too lean on the high speed, it will be hot and hard to start. Sometimes using 40 to 1 mix helps with starting, especially on older chainsaw. good luck

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1 Answer

Engine dies upon acceleration after starting and idling


turn the high speed and low speed mixture screws right in[gently]then out 2.5 turns.start it up,screw the idle screw up till it will idle,then adjust low speed mixture screw in or out so you get the highest idle.keep lowering the idle so as you adjust the screw,it wont get it any higher in revs.so by now it should idle.next,open the throttle wide,and adjust the high speed screw until you get maximum revs..then,turn screw 1/4 turn out.that makes it slightly richer,cooling the plug with droplets of petrol.you dont want it lean.if it wont rev fully,check the fuel filter.they get dirty quite often

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1 Answer

Starts, idles and runs but quits after a few seconds of cutting


Check the air cleaner and muffler for plugging. One screw adjusts the idle stop (idle speed) position and the H and L jet screws set fuel mixture for high speed and idle speed mixture respectively. Turn both jet screws CW to stops (lightly) then back each out CCW 1-1/2 turns. This is a basic setting and should allow the engine to start and run. Start the engine and allow to warm up. Pull the throttle full on and adjust H CW until the engine starts to speed up, but 4-strokes. Correct adjustment is when the engine 4--strokes running free, but immediately 2-strokes when cutting. Release the throttle and adjust L needle CW until the engine idles fairly well, but allows the engine to 'follow the throttle'. Adjust the idle speed screw so that the chain stops turning, but the engine will continue to run. Hope this helps!

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I have a older model # 30 jiffy ice auger and i can not seem to keep it running consistanly. I was wandering what the carburator adjustments are. The low idle screw and the high idle screw where do I start...


Hello Randy. I can talk you through making adjustments to your Jiffy ice auger engine.
1. Read through the whole list before you start adjusting.
2. Close both jets GENTLY
3. Open the Low speed 1/4 turn
4. Open high speed jet 1 1/4 turn
5. Start engine.
6. Adjust low speed until idling smoothly.
7. Open her up wide open.
8. Adjust High speed until engine transitions smoothly from idle to high speed without bogging.
9. Shut engine off. Let it cool.
10. Once engine is cold. Fire it up and let it idle for 30 secs. Open it up wide open again. Adjust if necassary.

NOTE 1: The trick with the Jiffy's is to tune them during cold (ice fishing) weather.
NOTE 2: Low speed screw,the one on the left.
NOTE 3: High speed on the right.

Good luck ice fishing! Regards, Joe

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1 Answer

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