et the wright settings for it? cheers Nick
Garden

Experienced gardeners share their insights in answering this question :
Hi Nick and welcome to FixYa. I am Kelly

If your starting from scratch do this:
1. First off completely remove the jets one at a time and inspect for a point on the end of the jet. If one of the points is missing it is stuck in the body of the carb and will have to be removed. (I have had to replace carbs because of this due to the fact the piont proke off in the body and could not get the broken piece out of the carb body)
2. Re install each jet and screw it in until it reaches the closed position until they just stop moving DO NOT over tighten.
3. Open each jet 1.5 turns from closed
4. Start the chain saw and accelerate to max speed
5. Adjust the high jet so that under no load it no longer sputters / misses
6. Let unit return to idle
7. As soon as it reaches idle accerate to full throttle again
a. Repeat the return to idle and accelerate process and adjust the low jet setting so that the chainsaw does not hesitate when you rapidly accelerate the engine.
8. Adjust the idle speed so that the chain saw idles but does not rotate the chain.

That is pretty much 2 jet / 2 cycle carb adjustment 101.

Make sure you have the air filter installed when making final adjustments as air filters can cause it to perform differently when installed vs removed especially if the filter is not clean.

Make MINOR 1/8 th turn or less adjustments as your going through the adjustment process!

Thanks for choosing FixYa.

Kelly

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

Carburetor Idle Adjustment

The most probable – and easiest to fix – cause of chain rotation while the chainsaw engine idles is a poorly adjusted idle setting on the carburetor. The result is that too much fuel is delivered to the combustion chamber when the throttle is released, and the engine doesn`t really slow.

The letters on the screws represent High (H), Low (L) and Idle (T). The H screw regulates the Air/Fuel mix during high RPMs, while the L Screw does the same during low RPMs. The T screw regulates how much fuel is sent to the carburettor while idling until the throttle is pressed.
Because the air doesn`t enter the engine in a controlled or consistent manner, it will cause the RPMs to surge up and down depending on how lean the mixture is at any given moment. This can cause serious engine damage because of a lack of lubrication.
Turn the idle screw to adjust the idle—turn the screw to the left to increase the RPM or to the right to lower it. When you have adjusted the idle—aim for 650 RPM—reconnect the idle air adjustment valve`s electrical connection. Lower the hood and turn your car off.
Troubleshooting Fast Idle Problems

If the PCM offers no hints, the best place to begin looking for problems is with the Idle Air Control Valve/Bypass Air Control (IACV/BAC). You can try cleaning it and see if that improves your idle speed. A throttle body cleaning is likely to cure the high idle speed as well.

If fuel sits in the system for too long, the carburetor (and the engine and fuel lines) can become sticky and clog. Remove the air filter and spray the carburetor with carb cleaner—an aerosolized acetone spray made to remove the gunk.
Most chainsaws idle at around 2,800 to 3,200 revolutions per minute, or RPMs. At this speed, the crankshaft continues to spin, but the clutch doesn`t. When the trigger is pressed and the engine speeds up, the force pushes outward on the clutch.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Craftsman 28cc 16" chainsaw wont idle – Craftsman 38cc 16" Gas Chain Saw
ANSWER : If you’ve already tried the idle adjustment screw and that didn’t work, you need to turn the low side adjustment CCW a quarter turn and try again.

Read Full Q/A … : Garden

I have a new Husqvarna chain saw and when it is turn on its side it dies whats wrong.
ANSWER : Its hard to say what is causeing this, there will always be a slight difference in rpm as it moves from side to side, the fuel hose should move in the tank and follow the fuel, if the machine is idling to low it may stop as you turn it, make sure the fuel hose is not trapped in the tank.

Read Full Q/A … : Garden

My micro xxv has been idle for several years, now I ‘d like to get it going again. Do I need to do more than fresh fuel?
ANSWER : Absolutely! Check to make sure that you are getting fire at the plug before moving on to my Tips. If you don’t get spark at the plug, then you have a bad Ignition Coil (Module).

Here are a couple of my Tips that you will definitely need to check: http://www.fixya.com/support/r6078121-fuel_line_relacement_trimmer_weedeater

Jim

Read Full Q/A … : Garden

Chainsaw starts and idles no trouble but when i try to rev up for cutting the engine dies as if it is not getting fuel
ANSWER : Low side adjustment issue. Turn it out a quarter turn and try it again.

Read Full Q/A … : Garden

The engine idles way too fast and will not correct with the sow speed adjustment
ANSWER : Make sure that you are adjusting the idle speed screw, not the idle jet screw (L). If you are adjusting the proper screw, then it is possible that the throttle trigger assembly in the handle has a load of sawdust/dirt that blocks proper return to idle. Take the handle apart carefully, and make notes on how the parts go back together. Check at the carburetor throttle assembly to make sure the throttle arm returns fully to the idle speed screw when the trigger is pulled and released slowly. Check the throttle spring as well to make sure it is undamaged. Hope this helps!

Read Full Q/A … : Garden

Won’t idle ,runs wide open unless you pull choke,solutions?
ANSWER : Maybe a carb overhaul can do the job.

Read Full Q/A … : Garden

<!– from fixya rte –>How far to turn idle screw out after rebuild – Poulan 14 Woodshark Chainsaw
ANSWER : You’ll have to do a visual on this one. But you turn it out until the throttle plate just starts to move, where it can get a little air. This is the initial start position and you can fine tune afterwards.

Read Full Q/A … : Garden

I have a 38cc champion chainsaw. The hi, lo and idle settings are all wronge so i cant get working correctly. Could you please tell me how to get the wright settings for it? cheers Nick
ANSWER : Hi Nick and welcome to FixYa. I am Kelly

If your starting from scratch do this:
1. First off completely remove the jets one at a time and inspect for a point on the end of the jet. If one of the points is missing it is stuck in the body of the carb and will have to be removed. (I have had to replace carbs because of this due to the fact the piont proke off in the body and could not get the broken piece out of the carb body)
2. Re install each jet and screw it in until it reaches the closed position until they just stop moving DO NOT over tighten.
3. Open each jet 1.5 turns from closed
4. Start the chain saw and accelerate to max speed
5. Adjust the high jet so that under no load it no longer sputters / misses
6. Let unit return to idle
7. As soon as it reaches idle accerate to full throttle again
a. Repeat the return to idle and accelerate process and adjust the low jet setting so that the chainsaw does not hesitate when you rapidly accelerate the engine.
8. Adjust the idle speed so that the chain saw idles but does not rotate the chain.

That is pretty much 2 jet / 2 cycle carb adjustment 101.

Make sure you have the air filter installed when making final adjustments as air filters can cause it to perform differently when installed vs removed especially if the filter is not clean.

Make MINOR 1/8 th turn or less adjustments as your going through the adjustment process!

Thanks for choosing FixYa.

Kelly

Read Full Q/A … : Garden