Gentlemen
Thank you for your speedy and detailed responses
This was my first breakdown and the engine was running as sweetly as ever after the AA man got me going again
As you may guess I am not an engineer but I will pass your observations onto the dealership where I bought the M3W and who lsold me my first Morgan Plus 4 4 seater in 1968

Morgan 3 Wheeler New Sport Green & Chrome, First Morgan was a 4 seater 4/4 in 1968