06-09-2020, 06:39 AM
I’m having the same issue on my 01 3800. Port tach works for 5 min after start then gets erratic. Starboard tach slightly more consistent. Alarm goes off in choppy water. I have used electric grease on most fittings I can reach that jump gauge to gauge. I will check the ground at the key this weekend. Ground bus was cleaned and greased no change. Not sure if there are any grounds to check on the engine synchronizer or not. If anyone has found the solution please share. Thx!


![[-]](https://www.tiaraownersclub.com/forum/images/netpen-pro/collapse.png)