2016 200 G2 ETEC

[Flysmallie]

On 8/7/2023 at 8:53 AM, Gumboot said:

I turn the key, the motor seems to go thorough a startup process where the tach spins to the peg and back to zero, and then it cranks.  Takes 5-6 seconds for it to finish thinking about cranking.  Then it cranks and starts on the first hit.

 

I'm not a boat mechanic, but a bit of an electronics nerd. I don't know this system but it sounds like an issue with the computer. Could be a sensor, could be a software issue. Could be something that you just have to get used to as well. But obviously the system is going through a sequence before it allows starting. 

[fishinwrench]

3 hours ago, Flysmallie said:

 

I'm not a boat mechanic, but a bit of an electronics nerd. I don't know this system but it sounds like an issue with the computer. Could be a sensor, could be a software issue. Could be something that you just have to get used to as well. But obviously the system is going through a sequence before it allows starting. 

You're 100% correct.  And the intermittent loss of sufficient ground connection causes the sequence to restart itself until the cycle completes UNINTERRUPTED.  👍 

Who here hasn't had a cell phone charging cord go wonky ?    Same exact deal.    Flash-flicker-flash-flash- Ok now we're charging.  🙄  Replace the charging cord and you're all good until a mouse pube (or something) gets into the little plug and alters its connection.

[Flysmallie]

4 minutes ago, fishinwrench said:

You're 100% correct.  And the intermittent loss of sufficient ground connection causes the sequence to restart itself until the cycle completes UNINTERRUPTED.  👍

If it restarted the sequence the tach would go back and forth every single time. It’s not a sequence, it’s a computer program. And it has to go through several steps before it completes. These are very small voltages inside that computer with millions of calculations happening. If there was a short in that itself, it would never run. It’s not the same as the 12 volt system it controls. Now one of the sensors that it’s reading could be faulty, maybe a short, or maybe just old, or has a production problem. It could be the tach servo itself that has a problem determining its limits. Lots of things it could be. But it could also be exactly how it’s supposed to be. 

[fishinwrench]

The only thing that can move the tach needle UPWARDS is a shot of voltage through the charging system voltage regulator (gray wire).   

Simply powering up the tach (purple wire) only pulls the tach needle from its floated off position (usually 1000-2000 RPM) back down to zero.      

Nothing can throw voltage into that gray wire until the flywheel spins.