Take the cap form a spray can which will fit the starter fuel can.Make a hole in the side of the cap. Next run a tube/hose which will go from the spray of the starter fuel can through the cap hole into the carb. solenoid is attached to the cap via screws from the bottom of the cap. Inside of the cap is re-enforced before this is down to give solenoid stability. Next using a momentary switch connect the wires to the 12V battery.
Place the cap on the starter fuel can and you are ready to go. Solenoid is pushing the spray button causing the spray to work.
Good Luck,
