You would normally want to see at least 60 lbs in each cylinder. My experience has been that at between 50 and 60 they’ll still run but may be hard to start the closer you get to 50 or less. Have you had the powerhead disassembled to check for stuck rings as Tubs mentioned?
Best,
PM T2
He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...
