We don't normally work on these old Mercury outboards but this customer needed some help. He had paid a mobile marine mechanic to fix the running problem with his motor. The mobile guy had decided that the reason for the top three cylinders not firing was that the top two carbies needed carbie kits. So he supposedly did the top two carbies, handed the customer a large bill and left.
The problem was still there, it hadn't been fixed and was still running badly. The owner then brought the boat to us wanting the third carbie, that the mobile marine mechanic hadn't done, kitted as well. He didnt know it wasn't the carbies that were the problem, it was ignition failure. Our experienced mechanic Andrew correctly diagnosed the fault and replaced the bad ignition and now it starts and runs nicely. The customer has paid for a fair bit of work he didn't need, but he is back on the water with his old, but still good, Mercury 6cyl.