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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