How to Tune the Ryobi 410r Cultivator

Turn off the Ryobi cultivator and allow the unit to cool completely.

Place the choke control on the Ryobi into the partial choke position, which is lowered to the right of the machine.

Remove the four screws holding the air filter cover in place from the rear of the cultivator using a flat blade screwdriver and then pull the cover off of the engine.

Lift out the air filter from inside the housing, which is a circular-shaped item. Wash the filter with soapy water and rinse well, then gently squeeze out any extra water and allow the air filter to finish air drying.

Lightly coat the filter with SAE 30 oil and then spread the oil over the filter, squeezing to remove excess oil.

Slide the filter back into the Ryobi. Place the air filter cover back over the rear of the unit and close the screws.

Set an empty gas container under the gas tank and open the valve. Drain out the old gasoline mixture into the gas container. Close the valve firmly. Mix together 1 gallon of unleaded gasoline with one 4 oz. bottle of “Ryobi 2 Cycle Oil,” available from Ryobi, in a new fuel can. Fill the fuel tank with the new mixture slowly.

Start the engine after cleaning the filter and replacing the gas mixture. Let the engine run at a high idle speed to warm up, making sure the tines are not in contact with the ground. Let go of the throttle control and allow the engine to idle. Insert a flat blade screwdriver into the hole on the air filter cover and turn 1/8 turn clockwise slowly until the idle sound is smooth. Turn the screw counterclockwise 1/8 turn slowly if the tines rotate when the engine is idling until the tines do not spin.