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Location: Eastern Ontario | Started up an old 1958 Johnson 3 hp that I use occasionally on a canoe. Hasn't run for 2 years and amazingly started 2nd pull.
Now my question
I think it uses 32:1 mix
My chainsaw uses 40:1 mix
My trimmer uses 50:1 mix
I don't use any enough to keep the gas fresh do you think I would be safe using 40:1 or somthing else for everything?
Thanks
Edited by horsehunter 5/7/2012 12:44 PM
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Location: Not far enough north! | Too much oil will foul plugs and smoke like crazy, too little oil and engine will fail eventually. Just mix up a little for each most of the 2 stroke oils have stabilizer in them now so it should be good for a season. I like to use one gallon cans for the trimmer and saws... |
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Posts: 3504
Location: Elk River, Minnesota | Hiya,
with the advent of synthetic oils, you could at least cut down on the oil use in the trimmer and chainsaw by using Amsoil Sabre which is a 100:1 premix for small high RPM engines. I have used it exclusively in my ice auger and trimmer for almost 8 years now, and not even a hiccup in either.
As for the Outboard, I would mix as stated with a good TCW-3 oil. Here again, I would go with a synthetic which Amsoil makes what is called HP injector oil, which usually gets used as a 100:1 premix, or you could mix it as needed.
In all of my years, I have never known any outboard oil to have a fuel stabilizer in it, therefore, if you buy two gallons of gas for the outboard, just add a bit of Stabil or Seafoam to stabilize the fuel.
Oh...one more thing of note. If you have not done so already, it might be a good idea to change out the fuel lines on the motor itself. If the fuel lines are original, it will not take long for the ethanol blended fuels to gum up the lines and eventually have you rebuilding a carb. Due to the age of the motor, it may be best to stay with a non-ethanol blended fuel as the gaskets and such in the motor may not be up to the task as well.
Steve
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Location: 31 | horsehunter - 5/7/2012 11:51 AM
Started up an old 1958 Johnson 3 hp that I use occasionally on a canoe. Hasn't run for 2 years and amazingly started 2nd pull.
Now my question
I think it uses 32:1 mix
My chainsaw uses 40:1 mix
My trimmer uses 50:1 mix
I don't use any enough to keep the gas fresh do you think I would be safe using 40:1 or somthing else for everything?
Thanks
This is from the Evinrude website.
"Q - What is the fuel/oil mix for my motor?
A - The following is generally true: 1958 and prior used 20:1, 1959 thru 1963 used 24:1, 1964 and newer use 50:1. High performance usage (racing) requires a ratio of 25:1. New engine break-in (not DI) requires 25:1."
The link to the information is
http://www.evinrude.com/en-US/About.Us/FAQ/Oil.Fuel.htm?popup=true#... |
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Posts: 3504
Location: Elk River, Minnesota | Good call Jerry!!
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Location: Not far enough north! | VMS Your right I don't know of any outboard oil with stabilizer in it either. I should have been more clear in my post. The Stihl oil I use in my small engines has stabilizer in it which helps if you mix up enough for the season at one time... |
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Posts: 111
Location: Weyauwega Wi. | If you have the original tank??? On the bottom of some of the older motors it said to use a quart of straight 30 weight motor oil for a full tank. I know because when I was much younger I blew one up using the wrong mix. An old timer showed me the info on the bottom of the tank. I wish I was as smart now as I was back then. |
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Posts: 121
Location: Plymouth IA | I have some old Johnson's and a set of shop manuals that cover those years it says 1958 motor should be 24 to 1 mix. But the smallest motor i have a book for is a 5 & 1/2 hp
Edited by misterperch 5/9/2012 1:13 PM
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Posts: 373
Location: Maine Township, MN | One thing to consider is how fuel : oil mixtures will affect your air : fuel ratio. Too much oil in your fuel will effectively equal a leaner air : fuel ratio (less fuel per equal measure of air). Too little oil in your fuel and you have just richened your air : fuel ratio. |
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