dave921

Update again, think I found the cause for the instrument panel not showing revs, overheating etc etc, see attached photo. Think the multiplug must have gotten damp and shorted a couple of connections. Have bought a waterproof junction box so will attempt to snip the wires and fit into the box.

Hmm ok, so I shouldn't really need a certain starter battery type then, just needs to be in decent health from new? And yep that's a good point actually, will make sure to vent from high points. Will be back on the boat tomorrow so will try that and see if I get different results. If not, I wonder if the themonitor needs replacing.

Just to give an update on this, today I fitted the old starter battery that was in previously and jump started via leisure batteries, engine kicked in all fine. After running the engine at higher revs for a bit the battery light went out and the rev counter sprang back into life. Also the Sterling device lights all went back to normal (solid green instead of flashing). So now just wondering what the difference was between the old and new batteries? Only one on paper is the old battery is 90A and the new is 105A, so maybe that's what the problem was? Anyways was happy that was sorted but now the engine coolant temp is getting super hot, like the dial goes as far right as possible. I did top up the coolant the other day, is it possible some air has entered and I need to take the cap off to let it breathe for a minute while running? Or could it be a faulty reading on the dial? It's a Nanni 43hp engine for reference. Thanks all!

12v battery

Appreciate your concern for the boat mover. Yep they have been made aware.

It has to move tomorrow, booked a boat mover to start it's journey tomorrow to the marina where we want it

Well the battery isolation switch was off when swapping the batteries, engine off etc obviously so not sure how the alternator would have been trying to charge during the swap out. Will just have to double check the connections in the morning by sounds of things. If not, then alternator will need replacing judging by the consensus here.

Nope, no magic smoke, just replaced the battery connections like for like when swapping out. May have been possible that a connection has come loose so will double check tomorrow. The boat is also being taken out the marina tomorrow so will be able to see if the charge light goes after a few hours of engine on time.

Yep, revved the engine past 1000 and no movement on the dial. Just don't get why this has happened since swapping out the battery. Had a survey on the boat before purchase and that came back with a clean bill of health.

When I turn the ignition key to on, the alarm sounds as normal, yellow battery light on. Turning the engine on, the yellow battery light stays on, and the rev counter doesn't move regardless if moving or not.

No, single alternator fitted. I will re-check the connections when I'm back on it tomorrow, hoping that is the cause as will be an easy fix I guess. The rev counter on the dial when the engine is running has also stopped working since fitting the new battery so may be as you say a loose connection.

Yeah that makes sense, could have been sat on shop shelf for a while before I took it. If that is the case, then surely the old battery that I replaced would have also triggered the LED to slow flash green, but this was on solid (which means normal) and that battery was completely flat. So not sure if a half depleted battery would trigger this error or not

I thought that I totally but as the excerpt from the manual that I posted above states that the boost charge is not on and in standby mode, meaning it isn't charging now? Maybe you're right as in I need to run the engine for longer and see if that tops the battery off although I thought new batteries came fully charged as is. And no, didn't measure the voltage, I would have assumed it would be 14.4 or whatever being as it's new. Thanks for your reply.

Hi all, New to this forum and narrowboating in general! Just finished the purchase of our boat couple weeks ago and the starter battery was flat. Bought a new starter battery (105a open lead acid) and now the LED light on the Sterling device that was previously solid green is now slow flashing green. See below from the manual: BOOST / HIGH CHARGE RATE ON : Green: This should be on from start-up (a slow flash shows that the unit is on but on standby, ie the high alt temp trip or some other trip has switched the boost aspect off and the unit is waiting to reset if possible). My question is why fitting a new battery has caused this, and how do I get the LED to stay solid green? Thanks in advance.