50:1 ratio?

gateway

Seaman
Joined
Aug 10, 2002
Messages
64
My 1979 johnson seahorse 4 hp say's the oil ratio is 50:1 I am new to this mixing stuff. the can say's that one can of oil to one gallon of gas is 16:1 does this mean I mix three of these cans to one gallon of gas? to equal 50:1.
 

ob

Admiral
Joined
Aug 16, 2002
Messages
6,992
Re: 50:1 ratio?

I'd get me some tcw-3 two cycle oil and mix 50:1.50 parts gas to 1 part oil. mix 1 pint oil to 6.25 us gallons.
 

gateway

Seaman
Joined
Aug 10, 2002
Messages
64
Re: 50:1 ratio?

Fellas...im only mixing oil to one gallon of gas.<br />thats all. this 4hp has a very small tank.<br />thanks.
 

corm

Lieutenant Junior Grade
Joined
May 12, 2000
Messages
1,241
Re: 50:1 ratio?

16 oz of 50-1 oil to 6 gal of oil is a 50-1 mix.<br />Or 2.66 oz's of oil to 1 gal of gas.(the can says<br />3oz's of oil per gal)<br />A qt of oil to 6gal is a 25-1 mix.<br />...have fun...corm
 

ob

Admiral
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Aug 16, 2002
Messages
6,992
Re: 50:1 ratio?

with all due respect 16oz. to 1 gal is 48:1
 

ob

Admiral
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Aug 16, 2002
Messages
6,992
Re: 50:1 ratio?

do the math . the reason I gave it to you in 1 pint oil to 6.25 gal is that to my knowledge the smallest amount you can buy of a good tcw-3 oil is 1 pint. Most people mix at least 6.25 gallons. you can mix smaller amount but be cautious of your ratios before firing off.1 pint oil divided by 6.25 is the amount to mix in 1 gal of gas
 

gateway

Seaman
Joined
Aug 10, 2002
Messages
64
Re: 50:1 ratio?

Thank ob....I got it now.<br />Im off to the lake.<br />no4njnk
 

corm

Lieutenant Junior Grade
Joined
May 12, 2000
Messages
1,241
Re: 50:1 ratio?

I've been a Marine Dealer since 1954. How about the rest of you? My 1st post is on page 247.<br />Most every bottle of oil say 3 oz's to 1 gal of<br />gas. This is a little rich, I use 2.5 oz's of oil to 1 Gal of gas on my toys. This is slightly lean<br />but works fine as I am usually trolling most of the time. I am done with this thread.<br />...have fun...<br />corm
 

gateway

Seaman
Joined
Aug 10, 2002
Messages
64
Re: 50:1 ratio?

I came out with 2.56 oz of oil to one gallon of gas to get 50:1 ratio.
 

ob

Admiral
Joined
Aug 16, 2002
Messages
6,992
Re: 50:1 ratio?

I'm not a marine dealer .I cut my teeth on big diesels for five years aboard ship then migrated to turbines and boiler feed pumps at municipal power stations.Did that for 18 years and took my early out.the only reason i see in my case for being anal about oil to fuel ratio is that between boating trips I rarely use all of my fuel in a 15 gal tank. If I subsequently keep adding a slightly oil rich mix up on top of another who knows what it is after 8 or 9 episodes.gas at 1.40 per gallon gets expensive to discard leftover each time to remix
 

gateway

Seaman
Joined
Aug 10, 2002
Messages
64
Re: 50:1 ratio?

Thanks Ya'll, I put 3oz of oil to 1 gallon of gas, it might be a little rich but i would rather have too much than not enough. It's idoling right now.and seem to be doing fine. Thanks a bunch fellas.<br />no4njnk
 
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