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If the oil and gas mixture is not right what will happen to the motor? What is the right mixture? Evenrude 28 hp 1960's 2 stroke

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You need to call a marine engine shop and ask them the proper mixture for that motor. To Much oil in the mix will only cause your motor to smoke excessively and may cause the plugs to foul quicker, but to little oil is when you start having problems. With to little oil you are not getting proper lubricarion, thats going to where all your mechanical parts like the piston, rings, cylinder walls, connecting rods, crankshaft, to wear really bad in a short period of time. Since there is so much friction from the parts wearing so fast thats going to generate heat, which is going to lead to locking up your motor. If no one can tell you the proper mixture just remember that it is safer to have to much oil in the mix than not enough, even though too much oil will make it look like your spraying for mosquitos with all the smoke. hope this helps.

Posted on Jul 02, 2009


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I found a mixture of sites for the information
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  1. Check your manual for the proper gas-and-oil mixture. For almost all modern two-stroke engines, a 50-to-1 mixture is recommended. That requires about 2 1/2 oz. oil for every gallon of gasoline.

  2. Use only two-cycle oil for your mixture. This oil is made especially for these engines and can be purchased at gas stations, hardware stores or any other place where you buy regular motor oil.

  3. Pour the proper amounts of gas and oil into a fuel can. Shake the can well to mix it.

  4. Label your gas can with the mixture ratio. You can use the same mixture for other two-stroke engines.

  5. Shake your fuel can thoroughly every time you refuel. After a while, the oil will settle out of the gas, and shaking it up ensures that the oil and gas are properly mixed again before you put the fuel into your chainsaw.

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