Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing morgan plus four m16 motor problem

when I had an M16 Plus 4 , which was usually reliable, I had just two issues, One was similar to yours in that power fell away but on restart was normal. This turned out to be a failing alternator. We did think of that first but dismissed the idea. However after eventually changing it there were no more issues of that nature. The other occasion was an abrupt engine failure as if the ignition hd been turned off. That was the clue of course. A quick swap over of the two relays under the dash by the bulkhead and the car started and ran as normal. I guess we are clutching at straws here but this might be helpful.