johnson xd50 2cycle ?

[48tony]

ok, yesterday i got this 16 once bottle of oil it is evinrude johnson xd50 synthetic blend. there is no mix ratio on the bottle. i am running a 50 -1 ratio.the gas tank in the boat holds 6.6 gallons . my qustion is how many gallons to the 16 onces will give me the 50- 1 ratio mix.thank you tony

 

[haffiman37]

Should be oil for 800 ounces of fuel - 6.4 gallons.

 

[daselbee]

Tony...it is 50 parts gas to one part oil.

So, if you have 16oz oil, 50 x 16 = 800 oz of gas. How many gallons is 800 oz? 800 / 128 = 6.25 gallons.

(But the easy way is remember 6 gals per pint of oil.)

Let's do it again with different numbers:

You have a 50 gallon tank, you fill it with 40 gallons of gas, how much oil?

40 gallons * 128 oz per gallon = 5120 oz of gas. Now you want it to be 50 to 1 ratio.

So, 5120/50 = 102 oz of oil or 102 oz / 128 oz per gal. = .8 gal. Just over three quarts.

 

[48tony]

thanks for the break down guyies.i found it odd not to have any info on the bottle to figure the ratio.butt the 6.25 is the key number i needed.i think i will right down the formular to this as i am half brain dead and next time in the case of not being sure i will have the info needed vs cooking my johnson off to the lake i go thank you tony