2014 SAN 230 Daed in the water... PCM XC 343

[Sporehouse]

Had a bad day on the water and of coarse it happens during the week of July 4th. Today we made several surf runs, everything was running fine. We throttled down and idled around to pick up our rider when the engine just turned off. We were 3/4 tank fuel, no hesitation, or other signs engine was struggling. I first thought I pulled the lanyard safety but is was intact and the engine would crank but no fire. I popped the engine hatch, checked fuzes. I could hear the fuel pump cycle after cranking the engine and no luck. I swapped relays ( the fuel pump and a power relay) and heard the fuel pump cycle again with no fire. At this time I threw the anchor and started to call some buddies that helped me get back on the trailer. The rest of the day was spent scratching my head. With more tools I proceeded to check for power to the ECU, Ignition, Fuel Pump... They all read 12.5 volts at the block. I was not able to get a common 12 volt read from the coil. I pulled a plug wire and tested for spark, I did not see any. I checked for any loose wires, played with the kill switch again... I'm not getting anywhere fast. This boat has under 150hours, PCM XC343. I'm calling dealers to beg for an onboard scan as I'm hoping to get in the water again this comming weekend, my feeling they are back logged as our Minnesota summer is in full swing. Looking for some guidance in the meantime.

[Sporehouse]

I spelled “Dead” wrong... I was a bit tired last night. So far with all my online research I have narrowed it down to a few things. Lanyard Switch comes up, still trying to figure out how to get access to the back. High pressure, low pressure pump and or filter blockage. I will get a real fuel pressure reading today as the ECU will not send a spark if the fuel preasure too low. Relays, I did swap them with 2 new ones . Coil and or Ingnition control module. This is what takes out some GM 5.7 vortex, with a sudden loss of spark. And last the ECM is bad... I found a procedure to check pin connections, although hoping a PCM dealer can slide my boat in for a scan. I hate to throw parts at an engine, but if it gets me back in the water!!!

[j2nh]

My money would be on the kill switch. You might consider jumping it and seeing if the boat will start.

[Sporehouse]

I’m trying to figure out how to access the back of the switch. I started to pull some of the side panels and see no clear access. Any pointers on an easy way to get it out? I wish there was a parts breakdown I can look at.

[Sporehouse]

I’m trying to figure out how to access the back of the switch. I started to pull some of the side panels and see no clear access. Any pointers on an easy way to get it out? I wish there was a parts breakdown I can look at.

[Sporehouse]

So I was able remove lanyard killswitch tonight. I had 12.5 volts running through when I hit the start button. With the lanyard in place the engine cranks and fuel pump runs. With it removed the engine does not crank and fuel pump does not run. I removed the switch and jumped it. Mine has only 2 wires. Engine cranked, fuel pump primed but no spark.

[Sporehouse]

Got an official fuel pressure reading this morning after getting a new gauge. Pressure sits at 55-60 on the rail while cranking. I get a tachometer reading and oils pressure reading on my screen when cranking as well. Uses an inline spark tester on 2 different cylinders, no spark! Called Marine Max, they put me in the book to bring it in on Monday. Hoping to find something simple creating the issue so I can get back in the water. Any suggestions or common experiences out there?

[Sporehouse]

The coil was the culprit... I needed up dragging the boat to The boat to he dealer and they swapped the coil and all was well. I did get to learn a lot about trouble shooting some issues in the future.