Evinrude model 6402-C - Is this a 2 stroke with a 50:1 gas/oil mixture?

I found a mixture of sites for the information
one owner of a 1998 25 hp evinrude says that it is a 2 stroke with a fuel mix ratio of 50:1 as 25:1 is a bit smokey
another site says that the recommended octane fuel rating is 87 although it might run better on 91
best advice is to find an evinrude service dealer and get the right information as the later 25 hp units are etec engine which will be 4 strokes

Johnson and Evinrude carbureted 2-stroke outboards since 1964 require a 50:1 fuel to oil mixture (2%) on engines without an automatic oiling system - 6 gallons of gas to 1 pint of outboard oil.

these small engines take 2 stroke oil/gas mixture, usually a 50 : 1 ratio, a little heaver on the oil is better than too light. the oil in the gas lubes the internal parts of the engine. if straight gas is introduced into gas tank just remove & replace with 2 stroke mixture. if engine has not been operated with straight gas, no harm will be done.

the mixture ratio is 50 parts gas to 1 part oil. Use only a good quailty stroke oil, never use motor oil

A Gale Buccaneer 2 stroke of recent manufacture will run a mixture of one part 2 stroke oil to 50 parts gasoline.
The early models use 24 to 1.
Use only good quality 2 stroke oil.
Using a little more oil doesn't hurt.

2 stroke means that it is a gas mixture. 4 stroke means that there is no gas oil mixture.

Fuel is VERY flammable. Use extreme care when mixing, storing or handling, or serious personal injury may result.

A 50:1 ratio with 89 Octane fuel can be used in all ECHO 2-stroke equipment, provided the oil is ISO-L-EGD and JASO M345 FC/FD certified. ISO-L-EGD and JASO M345 FC/FD oil must be used with a mid-grade (89 octane) or premium gasoline in all 1997 and newer engines.

A 50:1 Ratio = 1 US Gal. 89 Octane + 2.6 fl. oz. ECHO POWER BLEND OIL

Echo Power Blend Universal 2-Stroke Oil can be used in all of our 2-cycle air-cooled equipment ever made. You may also use this oil in any other brand of 2-cycle air cooled equipment, but it should always be mixed at the 50:1 ratio whether or not it was a 32:1 or 16:1 etc. machine. This oil is the highest quality 2-cycle oil on the market today. There is no need to have more than 1 tank of fuel for your 2-cycle equipment any more.

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A 4 stroke motor does NOT have Oil in the Fuel. There is NO fuel mixture. Just use regular gas. The only place you need oil is in the sump, and regular 20/30 motor oil will be fine.This only needs to be replaced when low on dipstick in crankcase.

12V battery 40:1 to 50:1 two-stroke ratio, but you shouldn't need to worry about that - it has automatic two-stroke injection.

the fuel to gas ratio should be 50;1 50 parts oil to 1 part fuel