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What is the fuel mixture - Ryobi Garden

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  • Dave Aug 14, 2010

    25 parts fuel to 1 part 2/stroke oil

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Uk with stihl oil it is 50;1 In the USA the mix is eithe 32;1 or 40;1

Posted on Sep 03, 2010

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Posted on Jan 02, 2017

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What is the code 171 mean on my dodge ram 1500


P0171 Chrysler - Fuel System Lean

Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection

Tech notes
If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.

When is the code detected?
- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption


P0171 Chrysler Description
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.

In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic).




P0171 Chrysler Fuel System 1 1 Lean

Sep 04, 2014 | Cars & Trucks

1 Answer

What is code p017.2 for a 2002 dodge caravan


This is the closest I've come to the code you are looking for. I searched all Dodge codes and didn't see any with a "point 2" but I found code P0172. According to EngineCodes.com your fuel mixture is probably too rich. This is what the site had to say:

Possible Causes for this Code:
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Faulty Mass Air Flow (MAF) sensor
Read more: http://engine-codes.com/p0172_dodge.html#ixzz35waCcFhN

This code is detected when:
- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)

Read more: http://engine-codes.com/p0172_dodge.html#ixzz35waXE700

Possible symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Read more: http://engine-codes.com/p0172_dodge.html#ixzz35waruoIU


P0172 Dodge Code Description:

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
Read more: http://engine-codes.com/p0172_dodge.html#ixzz35wbfFdyj


Hope this helps!

Jun 27, 2014 | 1999 Dodge Grand Caravan

1 Answer

Fuel mixture cbr600fs


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Air fuel mixture screw question CBR Forum Enthusiast forums for Honda CBR...
99 Honda CBR 900rr carburetor removal and air fuel adjustment
Honda CBR600F4I 2001 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CBR600F4i Owner Manual

Mar 29, 2014 | 1992 Honda CBR 600 F(2)N

1 Answer

Adjust air fuel mixture


Hi Wentzpatrick, on the right hand side of the carburator there is an idle adjusting screw with a spring behind it, turn screw clockwise to increase idle counter clockwise to decrease idle. There is also an air/fuel mixture screw inside a carb body lug that may or may not be plugged with an aluminum cap that's about 3/16" thick. This cap can be drilled out to acess the air/fuel mixture screw. Turning screw clockwise will lean out mixture and lower idle, turning screw counter clockwise will richen mixture and raise idle. You need to balance the two adjusting screws to obtain an idle of 950-1000 RPM then back out air/fuel mixture screw 1/4 turn, snap throttle to confirm responce, you may continue to back out air/fuel mixture screw untill desired throttle responce is achieved, if you see black smoke coming out of exhaust you have gone to far and need to turn screw back in 1/8 turn at a time. Good luck.

Jul 15, 2013 | Harley Davidson XLH Sportster 883...

1 Answer

Mixture screw adjustment on a ford maverick 1990 how to reset it ?


turn allen 3/32 allen mixture screw for each barrel counterclock wise for leaner fuel mixture if turn mixture screw clockwise richen fuel mixture.

Jul 13, 2013 | Cars & Trucks

1 Answer

O2 sensor


O2 sensor monitors the air fuel ratio consistently. It makes sure that the engine receives optimum fuel mixture all the time. If the mixture will be rich, i.e. more fuel and less air, it will signal the ECU to reduce the fuel supply and if the mixture will be lean, the fuel supply will be increased.

May 08, 2013 | 2003 Cadillac Deville

1 Answer

My machine overload,what do i do.the cilinder gets oil and the sparkplug is wet


Marthadelafu:

Remove the spark plug and clean it with rubbing alcohol and let it dry or blow dry it. Look at the carburetor. You will see two small screws next to each other. Those are the fuel/air mixture screws. one controls fuel, the other controls air. First check the air filter to see if it is clogged with dirt and debris... if it is, wash it in a soap and hot water solution and let it dry. After it dries out, reinstall it. Then turn the air/fuel mixture screws in GENTLY all the way. Turn them out one and a quarter turns. Check your fuel/oil mixture to see if you have the correct ratio of oil to fuel (most machines run on a 40/1 ratio... 40 parts gas to 1 part oil in other words, 40 ounces of gas to 1 ounce of oil. If your fuel/air mixture screws are one and a quarter turns out, the fuel/oil mixture is correct and the air filter is clean, the motor should start. You will need to adjust the fuel/air mixture screws a little to get the saw running to your satisfaction.

Jan 18, 2013 | Poulan Garden

1 Answer

I have a 1987 gmc jimmy with a 5.7 litre fuel injection and it seems to be lack air or has to much i dnt know . and i want to know how to adjust my fuel air mixture


Unfortunately, most fuel injection engines don't have an adjustable fuel/air mixture by the technician.

The fuel/air mixture is controlled by a computer.

Jul 03, 2010 | 1987 GMC Jimmy

1 Answer

Fuel oil mixture


use a 32:1 mixture which is approx 4oz 2cycle oil to 1 gal of gas. you can also add an ounce or two of of a fuel sys cleaner to your fuel mixture for a good cleaning of the carb to remove any gum or varnish build up which could cause poor engine performance. hope this helps you

Aug 08, 2009 | Homelite Garden

2 Answers

Fuel/oil mixture


3.2 oz oil in one US gallon yields 40:1 mixture.
2.6 oz oil in one US gallon yields 50:1 mixture.

Jan 15, 2009 | Humminbird 140c Fishin' Buddy

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