Brief history - This year, beginning of May, un-winterized boat, ran with muffs, all was well, gauges and all - sat unused 
. Tried to take out over weekend, would not start -identified as ignition module and fixed. Now tach doesn't work, temp gauge starts out fine, jumps to 225f quickly and after sitting 4 hrs on water reads 175 before starting engine, fuel gauge does not respond, engine alarm does not sound, and radio consistently pops 10amp internal fuse. Others gauges all work. checked wires - nothing obvious, ran ground directly from battery to fuse block - no good. Ran dedicated hot and ground to radio directly from batt, still pops fuses. checked grounds on fuse block - 2 remain grounded when unplugged, 2 do not. Am not sure what to try next. I would appreciate any and all help! Thanks!
. Tried to take out over weekend, would not start -identified as ignition module and fixed. Now tach doesn't work, temp gauge starts out fine, jumps to 225f quickly and after sitting 4 hrs on water reads 175 before starting engine, fuel gauge does not respond, engine alarm does not sound, and radio consistently pops 10amp internal fuse. Others gauges all work. checked wires - nothing obvious, ran ground directly from battery to fuse block - no good. Ran dedicated hot and ground to radio directly from batt, still pops fuses. checked grounds on fuse block - 2 remain grounded when unplugged, 2 do not. Am not sure what to try next. I would appreciate any and all help! Thanks!