oil fuel mix ratio recommendations

Idahodoo

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Joined
Aug 14, 2010
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1978 175 Evinrude Jet & want to get some input on what oil / fuel mix ratio to use. I was told to use 75 to 1 Oil Type (Amsoil HP injector) I was running 65 to 1 on my 1976 115 Johnson without any problems (same oil)

Both boats used mostly around 4000 to 6000 elevation in SE Idaho

Thanks for any recommendations
 
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