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Have mislaid my handbook and can't remember the 2-stroke fuel mixture. Is it 50:1 or 40:1? Thanks.

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What is the machine you are asking about? If you use a good quality synthetic 2 stroke oil, if you mix it at 40:1 you will not have any problems, whether it is a 40 or 50 mix.

Posted on Sep 04, 2010

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How can I adjust the idle and fuel mixture screws?


You'll need to give some more info, make model and year. Fuel mixture screws on any bike made in the last 25+ years don't do much, they allow a little more air in and that's it, won't remedy a significant amount of troubles.
Also we should know if you have a 2 stroke or 4 stroke bike. Fiddling with a 2 stroke can lead to serious overheating and/or seize your engine.

Dec 26, 2015 | Motorcycles

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What is the petrol to oil ratio for this engine


http://www.csgnetwork.com/oilfuelcalc.html
In the Mix
All STIHL gasoline-powered equipment uses a 50:1 gasoline/oil mixture. The chart below can help you figure out the correct measurements to use. For high-performance fuel that requires no mixing, choose STIHL MotoMix® premixed fuel.
25790035-cevbweydbg2pmncgiqmjhynr-5-0.png

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1 Answer

2009 Honda CRF450X how to adjust fuel mixture


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 for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Throttle Response Fuel Screw adjustments
How To 4 Stroke MX Fuel Screw Adjustment YZF CRF KXF RMZ FCR Part 1 of 2
Honda CRF450X 2005 Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda 2009 CRF450X Owner Manual Competition Handbook

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2 Answers

What is the fuel mixture?


hi there
pfrolander

the ratio of oil to petrol you should use is 50:1 ( that is 20 mils of hi quality 2 stroke oil per 1.0 litre of petrol you mix ) using hi quality sthil / husqvarna 2 stroke oil


1000 divided by 50 = 20 mils of oil per 1.0 litre of petrol



NOTE if you do not have any hi quality 2 stroke but some from your local garage ( that you may use in say a scooter for example use 40 mils of oil per litre it is richer


this will do the job

cheers hope it helps

May 27, 2011 | Ryobi 30cc 17" String Trimmer Zrry30530...

1 Answer

Could you please let me know. 1] Can I use E10 fuel in my new RLT 30 CET 30cc trimmer that I have just purchased and am yet to start up? 2] Is 50 to 1 50mm of oil to one litre of petrol?


Hi and welcome to FixYa, I am Kelly

First off the engine is designed to operate on unleaded fuel. The manufacturer makes no statements at all about E-10 Fuel. I will tell you from experience that you can use E-10 Fuel but.... should you ever have a warranty claim make sure the entire fuel system is 100% unleaded pre-mixed fuel. Your not going to hurt the unit using E-10 fuel as long as you maintain the proper fuel-oil mixtures. If anything a splash more of 2 stroke oil as in 22 mm / liter vs 20 mm. Or (+) 8 mm per gal.

Manufacturers statemenrts and recommended fuel mixtures below:

Thanks for choosing FixYa,
Kelly

n This product is powered by a 2-stroke engine and

requires pre-mixed petrol and 2-stroke lubricant . Premix

unleaded petrol and 2-stroke engine lubricant in

a clean container approved for petrol.

n This engine is certified to operate on unleaded petrol

intended for automotive use with an octane rating
of 87 ([R + M] / 2) or higher.

1 Litre + 2 0 ml =

2 Litres + 4 0 ml =

3 Litres + 60 ml = 50:1 (2%)

4 Litres + 80 ml =
5 Litres + 100 ml =

The full operators manual is here:
http://www.screwfix.com/sfd/i/cat/pdfs/89/p4763889.pdf

Feb 27, 2011 | Ryobi 15" Electric Factory Reconditioned...

1 Answer

Fuel mixture ratio


The fuel mixture ratio for 2 stroke engines is 50:1. I am seeing this under riding mowers and garden tractors. Are you sure you have a 2 stroke?

Dec 08, 2010 | Garden

1 Answer

I want to check if a makita rbc 230 brush wood cutter runs on petrol (neat) or two stroke mixture


I think the model your speaking of is the RBC30. It is a 2 stroke mixture. The 430 models are 4 stroke and do not require mixing oil and fuel. They are made by Ryobi for Makita.

Here is the RBC 30

RBC30SESA
  • Powerful 30cc 2-Stroke Petrol Engine
  • Easy-Start Carburettor
  • Expand-It™ Attachments Compatible
  • 18"/46cm Cutting Path Width
  • 2 Year Domestic Warranty
Info on the 430

RYRBC430SES
  • New 4 Stroke Design
  • Light in Weight 7.3kg
  • Safe Anti-kick Feature
  • Reduced Noise Levels, Lower Emissions
  • 2 Year Warranty
This is pretty much the entire line up of their brush cutters:

http://www.mowdirect.co.uk/acatalog/MowDIRECT_RYOBI_BRUSHCUTTERS___PETROL_STRIMMERS_311.html

There is not a 230 model.

Thanks for choosing FixYa.

Kelly

Sep 06, 2010 | Garden

2 Answers

What type gas mixture is used in McCulloch chain saws?


40:1 is a safe bet for just about all chain saws.

Jul 02, 2010 | McCulloch Garden

1 Answer

Hi im after the fuel mixture for a 125L husqvarna straight shaft brush cutter.thanks


From you manual:
Two-stroke oil
For great results and performance use HUSQVARNA two--stroke oil, which is specially formulated for our two-stroke engines. Mixture 1:50 (2%). To maximize the life of your trimmer, you may choose to use a high quality synthetic oil formulated for two-stroke engines. Mixture 1:50 (2%). Never use two--stroke oil intended for water-cooled outboard engines, sometimes referred to as outboard oil. Never use oil intended for four-stroke engines.
WARNING! Always ensure there is adequate ventilation when handling fuel.

1 gallon of premium fuel to 2.6 ounces 2-cycle oil. 2.6 ounce pre-measured containers are available at most chainsaw outlets.

You can find your manual here:
HusqvarnaUSA.com
http://www.husqvarna.com/us/homeowner/support/download-manuals/
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – useful when downloading IPLs and Manuals
06 1500198
06 = year produced – 2006 (single digit before 2000)
15 = week produced - March
00198 = 198th unit Husky produced that week
HTH
Lou

Jan 24, 2010 | Husqvarna Forest & Garden 125l 18" Gas...

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