Hauled my boat to do the bottom and engine wouldn't start when it was put back in the water. Turned the key and nothing. Didn't even open the engine room access door during the haulout so nothing that I did to cause the problem. Yard electrician soon diagnosed it as a broken wire in the Yanmar harness. He made up a jumper wire and I was on my way. Believe the Yanmar harnesses have problems with broken wires as I've heard of a couple of other engines with the same problem.