Most late model Johnson/Evinrude outboards carry a decal stating a 100:1 ratio. Being an old timer, I still prefer the ol tried and true 50:1 ratio, one pint of 2 cycle oil to six gallons of fuel. Never seen a powerhead failure due to the richer oil mix.
50:1
what is the fuel and oil mixture for a kx 250, 2 stroke
If it is a 50 to 1 mixture it would be 2.6 ounces per gallon
No, the intake stroke pulls fuel-air into the cylinder, the compression stroke squeezes (compresses) this mixture into a small volume.
The piston stroke that prepares the fuel mixture for combustion in a four-stroke cycle is the compression stroke. During this stroke, the piston moves upward in the cylinder, compressing the air-fuel mixture that was drawn in during the intake stroke. This compression increases the temperature and pressure of the mixture, making it more conducive to ignition when the spark plug fires.
The ratio for the 2 stroke variety of the 1996 model, 9.9 hp Johnson outboard would be 50:1. This is roughly one pint of 2 cycle oil to six gallons of fuel.
The Johnson J90PLSS outboard motor typically uses a mixture of gasoline and 2-stroke oil. The recommended fuel is unleaded gasoline with a minimum octane rating of 87, mixed with 50:1 ratio of 2-stroke oil. Always refer to the owner's manual for specific fuel requirements and recommendations.
At the top of the compression stroke. That's the point at which the fuel/air mixture is under greatest pressure.
The correct fuel mixture for a 1979 85 hp Johnson outboard motor is 50:1
The 1977 Johnson 55 hp outboard motor typically requires a fuel mixture of 50:1, which means 2.5 ounces of 2-stroke oil per gallon of gasoline. It's important to use a high-quality, NMMA-certified 2-stroke oil for optimal performance. Always refer to the owner's manual for specific recommendations and any updates regarding fuel mixtures.
The stroke that begins as the compressed fuel mixture is ignited in the combustion chamber is the power stroke. This occurs after the compression stroke when the spark plug ignites the fuel-air mixture, causing a rapid expansion of gases that pushes the piston down, generating power. This downward movement of the piston converts the chemical energy of the fuel into mechanical energy.
my 1979 35hp Johnson is 50/1