Well, took the new (to me) Parker out today on first maiden voyage and it didn't go well. Dropped in a lake to water test and engine overheat alarm came on. Had to drop anchor several times for engine to cool. Luckily my friend was out on his little 14 ft v-hull and he towed me back to shore. Anyway, so while messing around waiting for engine to cool i was playing around with fish finder and couldn't seem to be able to get any bottom readings. Depth or Structure. So is there any way to troubleshoot for a bad transducer? it is a in hull transducer. Any help would be greatly appreciated.