Have owned this engine (on a pontoon boat) since 96. Very few problems. This week when I went to start it there seems to be no electricity to the starter. All other electrrical on the boat works fine (running lights, tilt, etc.) When I turn the key not even a single click comes from the engine - it is as dead as a door nail. The only change that has been made to the boat recently was the additional of a 400 watt inverter directly off the battery. The boat had worked fine with it installed. Since this problem has occured I have removed it just in case that is the problem but no luck. Any ideas on where to start? Thanks!