motor is a 1970 model, built by Eska for Sears.
Eska is now out of business, however the powerhead part &motor itself was built by Tecumseh & still very much in business.
The mix for this motor is 24:1 using normal 2 cycle motor oil (as for chainsaws/lawnmowers - not normal marine oil..."
24:1 ratio
gas and oil mixture
See page 2 of owners manual and parts list for Sears 3hp model 217-58540 under "B. Specifications": "Fuel Mixture..... 1/2 pint No. 30 outboard motor oil to one gallon of regular gasoline. CAUTION: Do not use multi-viscosity (10W30) oil. (16 to 1 ratio)"
50:1 gas to oil.
50:1
50 to 1 oil to gas
50 to 1 or 2oz of oil to 1gallon of gas
the mixture is 50:1 I would use synthetic oil
I have a 1999 Mercury 2stroke 5HP outboard and the owners manual states 50:1 Gas/Oil mixture.
My 2003 3.3hp outboard motor is 50:1 mixture.
50:1
24:1 TCW3 2-cycle outboard oil - Rj12yc or equiv. plug