2003 Yamaha 200 hpdi v-max with a constant LOW SOUNDING audible alarm. NEED HELP!!

tbstevens

Recruit
Joined
Mar 15, 2017
Messages
1
Was fishing a tournament a few weeks ago. I had the boat on a plane at about 3500 rpm when all at once the alarm came on and shut the engine off all at once. I trolled back to the launch and have been trying to diagnose the problem ever since.Alarm stays on whenever you try to start the engine now.... Here is a list of what I have checked and what the engine will do.
- Engine will turn over (Alarm on at all times)
-Will not start
-I have went over every wiring harness and looked at every wire for breaks or cuts
- I have bought a (used) ECM and put on it (someone said that is what it was)
-I have omhed out the kill switch, oil reservoir, water sensor, temp sensor, and everything checks out. (I am an electrical teacher)
- If I take the oil sensor out of the reservoir it gets much louder. (This is a lower sounding alarm)
- I have bypassed the keypad with a ignition switch

The engine is still doing exactly what it was doing the day it tore up. I need your help please. Any recommendations are welcomed. THANK YOU!!
 

N1NE1

Petty Officer 1st Class
Joined
Sep 21, 2008
Messages
235
May sound stupid but Have you checked for spark, fuel ,compression..The basics to give you a starting point.
 
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