I just bought a Johnson 70 VRO and the previous owner has no manuals etc. He said that to start it, you hold the key in a pre start position and then start it. Is this correct and does anyone have any other info on it. I intend to check that the warning horn operates as soon as I install it on the boat. It also comes with a Tacho and trim gauge but no wiring diagram. Any body able to help me with that one? Thanks for any info.