What happens if you use 40:1 fuel to oil mix in a 50:1 echo pb251 leaf blower engine?

the mix is 50:1 so the weight to volume will not matter
if you have a 1 gallon tin the amount of oil will be 1/50 of the gallon
1 gallon =128 oz so a ratio of 50: 1 would be 1 gallon of fuel to 2.6 oz of oil or 1/50 of the gallon calculate the oil required by dividing 128 by the recommended ratio figure (128 divided by 20 or 30 or 40 or 50 to get the oz amount of oil)
the thing is that the mix doesn't have to be exact as long as it is not tool short on the oil
so a mix ratio of between 30:1 to 50:1 will run in 2 stroke engines but a mix of 60:1 will cause problems
A good mix is when you can see a faint oil smoke when operating
too muck smoke and there is too much oil and no smoke too little oil
the major factor is--- do not use e-mix fuels

Sometimes, the fuel ratio is stamped on the fuel cap. Your ratio is 50:1. Echo specifies using 89 (mid-grade ) octane Here is a chart that tells you how much oil you need in a gallon of gas...Just 1/2 it for a half-gallon mix. A copy of your manual is also here.

http://support.mtdproducts.com/app/answers/detail/a_id/347/~/two-cycle-engine-fuel%3Aoil-mixture-chart

http://www.echo-usa.com/getattachment/624aee9f-103c-416c-ae9b-55fb42dd94af/PB250es1112_010410_1.pdf

2 stroke means that it is a gas mixture. 4 stroke means that there is no gas oil mixture.

Fuel is VERY flammable. Use extreme care when mixing, storing or handling, or serious personal injury may result.

A 50:1 ratio with 89 Octane fuel can be used in all ECHO 2-stroke equipment, provided the oil is ISO-L-EGD and JASO M345 FC/FD certified. ISO-L-EGD and JASO M345 FC/FD oil must be used with a mid-grade (89 octane) or premium gasoline in all 1997 and newer engines.

A 50:1 Ratio = 1 US Gal. 89 Octane + 2.6 fl. oz. ECHO POWER BLEND OIL

Echo Power Blend Universal 2-Stroke Oil can be used in all of our 2-cycle air-cooled equipment ever made. You may also use this oil in any other brand of 2-cycle air cooled equipment, but it should always be mixed at the 50:1 ratio whether or not it was a 32:1 or 16:1 etc. machine. This oil is the highest quality 2-cycle oil on the market today. There is no need to have more than 1 tank of fuel for your 2-cycle equipment any more.

Do not forget to rate the answer, Thank-you

should be written in the manual and on the lid if not i always run 40 to 1 better safe than sorry to much oil ratio can foul a plug running to light on oil can blow the motor

Most likely not the answer you are looking for but here is a shot:

Pick up a bottle of the Echo brand 2-cycle oil. It will say "Extended Life" on the labeling. This is meant to run in Echo products, but it is a very FINE and well engineered oil. Mix it according to label directions for 50:1 ratios. (2.6 Oz. to 1 Gal. Gasoline)

When mixed at this ratio it provides MORE than adequate engine protection for ALL 2-Cycle engines, including those that run in 40, and 30:1 ratios.

I mix one 2-cycle tank to label instructions on the Echo oil for 50:1. It handily runs in my Echo chainsaws, non-echo trimmer, Poulan Pro leaf blower, etc. They all run different ratios, but THRIVE on the Echo mix without as much oily residue and smoke to boot!

CAUTION: I do not know of ANY OTHER MAKE of 2-cycle oil that CAN DO THIS *SAFELY*.

Remember:

Always mix your 2-cycle fuel starting with *fresh* gas.

Mix only that which you can use in 30 days.

Use 89 Octane fuel to make your mix in small piston 2-cycle engines.

Clean and re-oil intake filters @ every 10 hrs. operation time. Check and re-gap your plug when you service your filter!

DRAIN unused fuel from tank back into gas mix container. Restart and let engine idle to run any remaining fuel out of engine and carb. Storing fuel in ANY 2-cycle longer than two weeks is going to gum them up and nothing short of a carb rebuild will get them sputtering back to life again!

New Echo manuals say "50:1 for all engines regardless of what is printed in manual."
Fuel/Oil Mixture

1. Use a quality 2 cycle oil and mix it to the OIL supplier's recommended ratio. Today I use Stihl 2 cycle oil mixed @ 50:1 in a Pioneer that I purchased new in 1980. There are no gouges or scratches on the piston or cylinder and I have no carbon build up on the piston top. The manual (on stone tablets) recommends 24:1. Over the years the mixture has leaned from 24:1 (Saw Recommendation) to 28:1 (Lawn boy mower recommendation) to 32:1 (Oil provider 2gal premium/8oz chainsaw 2-cycle engine oil - used for many years) and finally the last 5 (±) years 50:1 (1gal premium/2.6oz Stihl 2-cycle engine oil)
2. Any fuel containing ethanol is not good with chainsaws. Mix what you expect to use within a few weeks. Anything over 1.5 months old use up in a 4 cycle engine. HTH

Lou

Most 2 stroke engines.......99% now use 50 to 1 mix in the fuel.
Others are close to this ratio.

Older....over 20 to 30 years old ........that may have had 20 to 1 ....or other ratios run happily on a 50 to 1 ratio using the newer 2 stroke oils.
And......BONUS.......they have increased engine life because of reduced semi burnt oil build up caused by "too much oil".......particularly around the rings on the piston(s) etc.

• Operator Manuals, Safety Manuals, Parts Catalogs, Safety Videos - ECHO ...

Misplace your Manual? Want to view a Safety Video? Look up a Part for your ECHO Equipment? Do It All Right Here

• www.echo-usa.com/documentation.asp?Model=PB-2100&lang=E
• ·
• Echo recommends 89 octane fuel and 50:1 mix to one gallon gas for your pb2100
• go to this site and find fuel and read about it if you would like
• i use 40:1 in everything i have and have had no problems
• The oil you buy make sure it is for 2 cycle engines and not outboard motors
• 50:1 =2.6oz to i gallon gas
• 40:1 =3.2 oz to i gallon gas

My echo uses 50-1 ration. Home Depot sells the small containers for Echo Leaf Blowers that you mix with one gallon of gas.

Here it is straight from ECHO:

Link is http://www.echo-usa.com/faqs.asp


A 50:1 ratio with 89 Octane fuel can be used in all ECHO 2-stroke equipment, provided the oil is ISO-L-EGD and JASO M345 FC/FD certified. ISO-L-EGD and JASO M345 FC/FD oil must be used with a mid-grade (89 octane) or premium gasoline in all 1997 and newer engines.
A 50:1 Ratio = 1 US Gal. 89 Octane + 2.6 fl. oz. ECHO POWER BLEND OIL
Echo Power Blend Universal 2-Stroke Oil can be used in all of our 2-cycle air-cooled equipment ever made. You may also use this oil in any other brand of 2-cycle air cooled equipment, but it should always be mixed at the 50:1 ratio whether or not it was a 32:1 or 16:1 etc. machine. This oil is the highest quality 2-cycle oil on the market today. There is no need to have more than 1 tank of fuel for your 2-cycle equipment any more.