Follow the steps to get into the advanced diagnostic. But.....highlighted in red is what you're getting. Doesn't look too good so far. Also make sure the boat shifter is in neutral as it won't start in forward or reverse.
Here is all the info on the DESS codes. It is possible that you are getting a mixed code.
DESS Codes/ Beeps
2 Short beeps …the engine is ready to start
1 Long beep …no communication to MPEM
4 Short beeps… (on Jet Boats) Shifter is in gear
8 Short beeps…defective MPEM
1 Continual beep…engine over heating
Advanced Self- Diagnostic Mode
By pushing the start/stop button 5 times (either one), you’re putting the DESS in advanced diagnostics. When you have successfully done this, you'll hear 1 short, 1 long beep then, put on the lanyard. Now try and start the engine--either one. Listen for the following if it doesn't start.
2 Short beeps means MPEM can’t read the lanyard cap or it has bad magnet. It could be a bad wire connection at the Lanyard switch.
2 Long beeps means wrong lanyard or bad connection of DESS connection
3 beeps signal the wiring harness of the DESS switch are grounded, or a short circuit somewhere.
You may have a bad connection in your wiring harness, from corrosion. Go through your electrical systems connectors and check for corrosion. Clean them with some contact cleaner, then die-electric grease.
To listen to the codes again start from the beginning.
