fuel/oil mix

[tuffshot]

The 89 Johnson Tracker motor on my new to me boat. The motor states it is oil injected but is not now. The previous owner told me he runs a 16 to 1 ratio. That mixture equals 8 oz of oil to 1 gallon of gas. Does this pretty rich?

While doing some investigation while searching for a boat I picked up on several boats that had problems with the older injector oil systems so most premix their fuel.

 

[d.boat]

Re: fuel/oil mix

The 89 Johnson Tracker motor on my new to me boat. The motor states it is oil injected but is not now. The previous owner told me he runs a 16 to 1 ratio. That mixture equals 8 oz of oil to 1 gallon of gas. Does this pretty rich?

While doing some investigation while searching for a boat I picked up on several boats that had problems with the older injector oil systems so most premix their fuel.

There's been no 16:1 engines as far back as I can remember and I'm closing in on 60. Your engine is 50:1; 1 pint oil for 6 gallons of regular gas, 1 quart for 12 gallons.

I vaguely remember 24:1, maybe in the early 60s? It's been 50:1 for all outboards since the mid-late 60s. Makes me wonder about the guy you bought it from???

Hmmm, I wonder if he somehow was telling you 16:1 meaning 16 oz oil to 1 tank of gas (tanks are usually 6 gallons)? that would be bizarre, but it's the only way I can imagine it makes any sense at atll.

 

[tuffshot]

Re: fuel/oil mix

There's been no 16:1 engines as far back as I can remember and I'm closing in on 60. Your engine is 50:1; 1 pint oil for 6 gallons of regular gas, 1 quart for 12 gallons.

I vaguely remember 24:1, maybe in the early 60s? It's been 50:1 for all outboards since the mid-late 60s. Makes me wonder about the guy you bought it from???

Hmmm, I wonder if he somehow was telling you 16:1 meaning 16 oz oil to 1 tank of gas (tanks are usually 6 gallons)? that would be bizarre, but it's the only way I can imagine it makes any sense at atll.

Actually he was saying the mixture on the oil label is 8 oz to 1 gallon of gas.

The fuel tank is approx 27 gallons it runs the width of the back of the boat. Tracker seems to think everyone is a tournament fisherman running miles on big lakes to fish / lol

 

[kenmyfam]

Re: fuel/oil mix

50 to 1 as far as I know.

 

[Vic.S]

Re: fuel/oil mix

In general 1958 and earlier 20:1
1959 through 1963 24:1
1964 and later 50:1

See http://www.evinrude.com/en-US/Owners-Center/FAQ/OilAndFuel

 

[d.boat]

Re: fuel/oil mix

How the heck does it run at 16:1? I would imagine it doesn't run very well and smokes like a chimney burning green wood?

 

[Al-53]

Re: fuel/oil mix

must look like a destroyer laying a smoke screen for a beach landing...lol....at least your killing the skeeters on the lake

Al

 

[Golfky]

Re: fuel/oil mix

I am trying to get a 1957 Johnson FD-11 running and I have 2 questions. The first is about the pressurised tank. When first starting a engine that has had the Carburator rebuilt, how does it get gas that first time before it is running. I can see how it works after the engine is running, but before that is a mystery. And I think that the oil mix on this engine is 24/1, but that was in 1957. Oil is a lot better today then it was back then and I was wondering if less oil was needed.
Thanks,