Hey Vic. Wish i was closer to give ya a hand again. And Corona Virus of course, bla bla bla. Anyhow a friend of mine swears by a combo of ATF and diesel or kerosene in the cylinders. Ive never personally tried it, but it wont hurt if ya dont have any thing else laying around. Ditto to checking for stuck valves 1st. Good luck and keep us posted.