What is the correct fuel/oil mix for evinrude 4hp ?

Try this site.

https://www.manualslib.com/

https://www.ebay.com/itm/1971-4-hp-Johnson-Outboard-Motor-Repair-Service-Manual-Evinrude-4hp-/192360652417

check the plugs if they wet its getting too much oil in the mix. if dry and black plugs then it could be not enough oil or fuel in mix.

91 octane rating ( no e-mix fuels ) and proper outboard oil ( not normal engine oil)
outboard oil has a property that allows the oil residue to stick to the metal bits and helps prevent rust
e-mix fuels absorb moisture and and rusts out steel tanks , destroys rubber components and corrodes aluminium components
the model you have is not listed on any 7.5 hp engine from 1950 to 1958
model number starts at 4434 to 7512 to 7525 in 1958
for a better answer , talk with an evinrude service center who should have a chart listing your motor
units with oil injection are 50: 1 ratio and others are 6 gallons to 1 pint of oil which is around 45:1
I would seek advice from an evinrude service center for the correct fuel to oil ratio for your engine
to mix the fuel , put the oil in first then the flow from the bowser will effectively mix it up to start with
then fit the cap on the tank and shake it up yourself

I have never seen anyone answer these questions.if you looking for a condenser they are all the same.eg a 1965 40hp condenser will fit a 1955 20hp

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.

3014 is a three horse 1955 Evinrude Lightwin. 16/1 fuel oil mix, points set at 0.020 and the NGK B6S plugs set at 0.030". 80-90W marine grade gear oil is used in the gearcase. Nice motors!

what 2stroke oil you using and mix ratio ? Quicksilver outboard oil is best and 50:1 mix ! send a picture of your carbs , side views and intake with airbox cover off !

The correct mixture is 50:1, or 1 pint per 6 gallon tank. Use quality brand-name outboard TCW-II or better oil(Bombardier or Mercury eg.) to eliminate the oil as a problem.

Check your plugs for fouling. If using perma-gap / surface-gap type plugs, switch to the L77JC4 type, especially for long idling or slow speed operation. For extended high speed operation, the surface gap plugs are recommended.

Open the fuel valve ( at the back near the spark plugs).
Pull the choke knob ( SB side at the lower front of the motor)
Set the throttle handle in 'start' position ( abour 1/4 of the travelling way from SB to Port)
Pull the rope starter.
Should start easily.