[Jon Foerster]

Thanks Tony…
you beat me to the punch.. I just got back from the boat. I did exactly that. After talking with the tech for a bit. he told me what he was doing to try and start the boat. Pretty sure he accidentally ran the sequence that messed up the TPS sensor. So I reset the system and and re calibrated the TPS and it worked.
Hope it helps the next guy..

What was tough was there wasn’t any codes flashing on the system. Now while I was plugging and swapping stuff I accidentally messed up a wire going to the Port motor. Good thing was that the codes flashed for that. So I guess the system works some times.. LOL..

Thanks,
Jon

[Jon Foerster]

Problem finally figured out. “ Guest Battery selector switch” After another day of tracing wires. Testing every fuse and relay it all came back to the first day. Starting when noticing a bad battery issue. When I started the battery switch was on “BOTH” it had been there since I got the boat last year. And when I started. When I started to isolate the battery issue I switched from 1 & 2 to figure out #2 battery was bad. I just assumed that when I was trying to start the boat (Friday night) #1 the battery was weak from being on “BOTH” and #2 making weak.
So for the next 2 days I never put the battery switch back on “BOTH” while i was testing and checking. I traced and pulled every battery connection from the battery back to the engine starters. Cleaned and made sure good connections. I replaced both batteries to be sure there was not a bad battery issue. I was getting 13.4V throughout the system to the starter. But when the battery switch was on 1 or 2 it would break down and only give me a “click” at the starter. Apparently a faulty switch.
In the end it came down to the advise of all. It was definitely a bad connection and electrical. And in the end it took me to go back to Friday and traced my steps then. The only thing I did that night was take the Battery switch from BOTH to 1&2 while trying to isolate which battery was bad. And the fact the both engines doing the exact same thing at the same time. Lead me to look and think about what connects both engines.
THE SWITCH….
Fireboy does connect both engines as well and it was just a coincidence that I must have for an instance while talking to the Carver tech that I had put the battery in BOTH while talking to him and hit the fireboy bypass at the same time. I started the boat engines 3 times and everything went perfect. Just after I got off the phone I went back to switching the battery switch back to 1 & 2 and didn’t pay attention at that time that I had started in BOTH.
Anyhow 4 days of chasing my tail to figure out the switch is bad. I put the details so that I hope it helps someone else out one day.
Cheers & happy boating… It was an asswhip for me this Memorial Day weekend….
But I did get to know my boat a LOT better…

[Jon Foerster]

Would it make sense that with both engines having the same issue at the same time that it would have to be something that connects both. As in the main positive that goes to the battery selector 1,2, both or off? I pulled both battery terminal at the battery and cleaned them.. they were not that bad but did it anyway. Would it make sense that it would be the positive at the selector switch.? Thats the only thing that I can think of that has both engines in common at the same time.

When I followed the Negative battery cables they each split to their own bank then to the starters..

I agree that the fireboy wouldn’t be the culprit since I’m getting initial Power to the starter. I would agree that it would seem like it would shut down all power to the starter. And when I went through their trouble shooting list it should be OK. But they are on my list to contact to understand exactly how it works when shutting down power.

I remember back in the day on an old truck, how I could cross on the solenoid and make the starter start. Didn’t want to try that not knowing which to cross and cause permanent damage to the starter.

Thanks Tony, you are a wealth of knowledge. I’m glad you started up this forum.. I still have all my old emails from the Cummins. I could forward them to you. Not sure if you can post them.

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