I cant get any of my gauges to work on my 75 Tropicana 18' tri hull w/ merc 120 except the tach and amp gauges... <br /><br />Would it be ok just to throw in a set of auto gauges for temp / oil press until I order a full new set of marine gauges??.... <br /><br />And I cant find any kind of fuse panel on the boat so without having to mess with the factory wiring where can I get a switched (key on) power source.. I read somewhere not to attach anything to the ignition<br /><br /><br />THanks