Cut out and then One beep

[Grayjrk]

Finally got to get out for first time this year. Started fine and ran for about 5 minutes slow not wake zone and then cut out. This was followed by a single beep. No error codes. Tried the key to restart and nothing. Checked for breaker and everything was okay. I turned the battery switch off and then back on. Started again no problem. Ran for about 4 minutes slow and died. This happened about 5 times to get back to the dock. About 3 of those times there was a single beep and not every time I turned off the battery switch would it come back right away. Thanks in advance.

 

[ScarabMike]

1. Maybe you are having knock sensor issues. Try this.
Turn the boat on, let it run until the boat shuts off and beeps. Then pull off the safety lanyard. Put the lanyard back in and attempt to start. If it starts back up, you might have bad gas going through the engine, or something is causing knock. If the fuel isn't the problem, then it gets a little more technical. Take it to the dealer, there will be a code (P0326) that should pop up in BUDS. In some cases, the mounting point of the sensor is subject. They will have to loosen intake manifold & move, remove center bolt from knock sensor, clean mating surface, mount sensor & torque to 18 ft. lbs. problem solved.

2. Loose spark plug coil pack. Check and make sure the connections are not corroded, and they are seated on the engine.

3. Loose connection on the diagnostic plug cap. Open your engine bay. Look towards the rear right bulkhead right behind the battery. You are going to see a fuse box with a beige cap on the right attached. There is a plug that is inserted into that cap. If this plug is loose or not fully inserted into the cap it will cut out intermittently. The cap has a resistor that the ECU has to see to take the engine out of diagnostic mode.

 

[Grayjrk]

Thanks ScarabMike I had the boat winterized and spring tuned up at my Scarab dealer.
I pulled the battery to find dirty negative leads and also the plug you mentioned floating around.
Is there suppose to be a green cap on it when I plug it back into the mount.

 

[Grayjrk]

see pic

 

[ScarabMike]

Yep, just plug it in. The green is part of the connector. And no problem man, glad you got it handled!

 

[BobJohnson]

Glad/hope this fixes your boat.

@ScarabMike excellent job. Man, you know your stuff and it's a pleasure to read and learn as much as I can about our engines from you. #rotax (my first ever hastag )

 

[Slugger55]

Wait until @ScarabMike sends you the "bill." Just kidding!

 

[Grayjrk]

Thanks ScarabMike I would rather pay your invoice than my dealer!!!
I plugged it in and off I went. It did cut out once after about 15 minutes mid speed and started without turning the battery switch off and on.
The RPM and MPH gauges went out this time with the engine cutting out. After I restarted it ran smooth for another hour.
The gauges came back and would cut out at high speed only.
Thanks again ScarabMike.

 

[ScarabMike]

Wow, it sounds like that dealer did a number on your boat. The cluster on these boats are very sensitive, but so are the engines sensors. The Rotax cannot be winterized like other boats, there are sensors that can be ruined.

Here is a thread on this.
https://jetboaters.net/threads/scarab-chaparral-glastron-rotax-winter-prep.5978/

At this point without looking at the boat, not sure what the issue could be other than the cluster's connection, a loose/bad fuse, or loose communication cable from the ECU to the cluster. Take the engine cover off, and see if they tried to connect their BUDS computer to the wrong connector, and left that loose as well. They should not have to connect BUDS for no reason other than maintenance.