I have a Toyota 7fgu25 serial number 76008 and if we do not turn off the propane tank and let motor die from lack of fuel. the next time we start it the motor will not start and takes 220 seconds to start it with the propane off. then runs for a min or so indicating the motor is flooded... so i am looking to replace the regulator.. the tag on the regulator is 30F80... any one can help with getting the correct regulator and if there is any advise on replacing it ?