Question about Echo Ppt-260 Chainsaws

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I have a ppt-260 that when cranked it runs at a high rpm without pulling trigger and does not return to idle, does anyones have a suggestion for a fix?

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Check your throttle cable as it may corroded and has the carburetor held in full throttle position or someone has the idle speed screw turn all the way in.

Posted on Nov 22, 2014

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Posted on Jan 02, 2017

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TB4SC Leaf Blower unused for months. Replaced Gas tank, Choke assembly and Primer bulb. Starts and runs at idle speed. When throttle is pressed it dies out.


The carburetor has 2 adjustment screws. One for idle and one for high rpm. They have weird heads on them to keep you from adjusting them without purchasing the proper adjustment tool. Look on ebay for carburetor adjustment tools for your particular blower. After you get the too, you can start the blower and make your adjustments. First one screw at idle, then the other while holding the trigger on full. The best way is to first turn the screws all the way to the right (closing the jet) then turn them back to the left 2 1/2 turns. This can be done prior to starting the blower. Then adjust accordingly until the blower runs at the best speed for the idle then at high rpm. You'll notice that the rpm's drop if you go too far either way. If you screw it up, go back to closing the jets all the way to the right, then open them back up to the left 2 1/2 turns. Good luck!

Sep 21, 2017 | Garden

2 Answers

My stihl chain saw runs full out without pulling the trigger? what can i do?


carby idle adjustment or a carby kit and clean needed

carby has a high and a low rpm jets

STIHL MS 290, 310, 390

https://www.stihlusa.com/.../instructionmanuals/stihl-ms-290-310-390-owners-instructio...
Instruction Manual - improper use can cause serious or fatal injury. MS 290. Warning! ..... model. Safe use of a chainsaw involves. 1. the operator. 2. the saw.

Oct 13, 2016 | Stihl 16" Chain Saw Repl. Chain Model...

1 Answer

Hi, I have a Mac-3200 and need to know where to set the 3 carb. screws at. T, low and high I don't have a manual Thank you. Z-man


Most guys adjust them 'by ear'. Warm up the saw (hopefully you can get it to start), and set the high speed by opening the screw until it sounds like it is 'burbling' at wide open throttle. DO NOT adjust until it is screaming at its highes attainable rpm !!!! If you do, the mixture will be so lean it will damage the saw under repeated heavy load. Leaving it 'burble' at WOT (wide open throttle) will ensure that proper lubrication will be available in the cut. Under load, the burble will disappear and the saw should pull strong and not overheat, damage the piston or score the cylinder wall.

Next set the low speed screw until there is no hesitation in rpm increase when the trigger is pulled. Some suggest setting the low speed first then the high speed so you may have to readjust the high speed once the low speed is done.

The idle screw should be adjusted to where the chain is NOT rotating the guide bar at idle. If it continues to move, the idle is too high.

Nov 22, 2015 | McCulloch Garden

1 Answer

I have a 2008 mercury Milan with nearly 60k miles on it. When I come to a stop the rpm drops by 1000 then recovers quickly. What should I do to fix the problem? Any suggestions will be greatly appreciated.


Check out related help links to troubleshoot these problem:----Click the link below:---Idles Fine but RPM jumps in drive mode? http://technoanswers.blogspot.in/2012/07/idles-fine-but-rpm-jumps-in-drive-mode.html
---------Mitsubishi Lancer rpm needle bounces? http://technoanswers.blogspot.in/2012/02/mitsubishi-lancer-rpm-needle-bounces.html
--------How to adjust rpm on 2009 dodge charger SRT8?


http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
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Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

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Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

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Jetski Sputters and Low RPM? http://whatisbyme.blogspot.in/2012/07/jetski-sputters-and-low-rpm.html

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Fuel Injection Problem And RPM suddenly increases http://whatisbyme.blogspot.in/2012/07/fuel-injection-problem-and-rpm-suddenly.html

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2005 Toyota Highlander: Engine runs hard RPM below 3000? http://whatisbyme.blogspot.in/2012/05/2005-toyota-highlander-engine-runs-hard.html

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1987 Toyota Camry: RPM Drops going Up hills? http://whatisbyme.blogspot.in/2012/05/1987-toyota-camry-rpm-drops-going-up.html

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Cruise Control stops working, Excessive cranks to start the engine and RPM goes max 2500 http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html

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1990 Toyota 4Runner: Engine cuts off when reaches 2000 RPM?


http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html

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1999 Toyota Camry: Erratic stalling and high engine RPM at idle?


http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html

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1995 Toyota LS: Misfire at idle or low RPM http://whatisbyme.blogspot.in/2012/04/1995-toyota-ls-misfire-at-idle-or-low.html

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Lexus RX: Tapping noise under Valve Cover At Low RPM? http://technoanswers.blogspot.in/2012/04/lexus-rx-tapping-noise-under-valve.html

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These will help.
Thanks.

Nov 22, 2012 | Cars & Trucks

5 Answers

MAF, IAT, MAP and Coolant Level Sensor Problem


They share the engine wiring harness from the computer (called the PCM) and a common ground circuit, which is referred to as the signal return. So I think you need to look for a defective ground.

Nov 18, 2011 | 2003 Mazda MPV

1 Answer

2nd use of chainsaw pp3516avx, it won't start, choke lever will not stay extended. I followed the instructions to start and nothing works


The choke system is connected to the half throttle position, if you lift the throttle trigger the choke pull will automatically return, whilst trying to start do not lift the throttle trigger, the starting procedure is, pump the primer bulb as many times as it takes to 3/4 fill the bulb, pull the choke pull fully out, this will switch the saw on and engage the half throttle, crank the engine until it fires once, do not continue to pull,it will actually not run on full choke, if you do continue to crank with the choke fully out, you will very quickly flood the engine, now push the choke fully in, now crank the engine until it fires up, lift the throttle trigger once, this will dissengage the half throttle, and it should now come down to idle.

Mar 19, 2011 | Poulan Pro 16-Inch 38 cc Anti-Vibration...

1 Answer

My TB70SS cranks and runs perfect! The problem is the clutch seems to not engage. The head will spin at idle speed, but, when I pull the throttle trigger, it seems to bog a bit, and the head almost quits...


There may be an issue with the clutch or the clutch drum. Some disassembly may be required if the string head doesn't spin quickly when accelerating the engine. The clutch itself is threaded onto the crankshaft of the engine near the handle end and the clutch drum is screwed into the end of the crankshaft. If you can disassemble to that point, you will be able to diagnose your clutch problem...maybe it is worn severely and needs replacing.

Aug 14, 2010 | Troy Bilt Tb70ss Gas Trimmer

1 Answer

Engine starts,reaches high rpm,then slowly returns to a rough idle, misses badly,no backfire,surges as if searching/adjusting air/ fuel/est,timing light shows mark constantly changing/erratic,engine then...


Vacuum leaks. Check all hoses and intake bolts. Leaking EGR or plugged PCV valve. Air filter plugged. Leaking head gasket. Worn timing chain. Camshaft lobes worn. Valves burned or leaking. Fuel idle control system or sensor. Good luck!

Apr 18, 2009 | 1991 Chevrolet Camaro

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