Hey team - long time reader, 1st time poster here. I have a 2006 Bayliner with a 2005 Mercruiser 4.3l with TKS. Not too long ago, the oil pump shaft sheared (yep sheared) and the oil pump quit. I had my mechanic pull the engine & replace the oil pump. Put it back in the water and runs like a champ! About a month ago, he dropped off the boat and within the past week, I was working on getting it ready for the season. I went to turn the key, no power. BTW - the battery was replaced when the oil pump was replaced. I hooked the [COLOR=#67B045 !important]charger[/COLOR] up and it turns out the battery was dead. Odd since the battery was new. I turned the key to on and there was power to the dash. Turned the key off and could hear a noise coming from the engine bay. It was my fuel pump. It runs 24/7 with the key on or off. I removed the maroon TKS diode and the pump shut off so that I could charge my battery and avoid an unsafe [COLOR=#67B045 !important]condition[/COLOR]. Plug the diode in, fuel pump starts up regardless of key position. One more thing to add...before I realized the battery was dead, I checked all of the [COLOR=#67B045 !important]fuses[/COLOR]. The only bad [COLOR=#67B045 !important]fuse[/COLOR] I could find was the 20a fuse in the plug that is located next to the diode plug. Any thoughts? Thanks! Chris