dave mackie

Yes , the light goes out and rev counter starts to work

How I understand is that alternator warning light is energised when ignition is in on position feeding it with the 12v req for light to be on, then when ignition key is in start position it excites the alternator into charging mode and turn light out. I'll look for a relay but I'm sure there isn't one on the starter battery alternator. I have two independent charging lights for starter and domestic systems.

Both alternators are basic stand alone systems. There's no relays. One lower amperage for starter battery and a higher amperage for the domestic batteries. The domestic side is working perfectly so I'm sure there's no relays used between the starting and domestic charging systems . I'll get the alternator removed and checked and while it's removed it will give me better access to the distribution block wiring for the charging/starter motor .

Cheers for the input peeps, the voltage checks on the alternator and the connections on the distribution block on side of engine was my next checks. It just seems strange that putting a higher current from jump starting seemed to start the alternator to charge.

New isolator fitted. When ignition is turned on the charging light is on.when engine starts the charging light stays on

I thought that as well so I had new multi plug fitted. I think I'll have to check wiring from battery to starter motor. There's a connecting block that's bolted to engine bearer that's a pig to get at that I haven't looked at yet

No remote alternator controller used. Twin alternators only.

Cheers for your thoughts guys. When I started engine before battery died I was revving the engine hard but alternator still didn't start charging. It wasn't until I had to jump start it that the alternator started to charge making me think that the alternator was not being 'excited' by the battery until I jumped it with fully charged one( making me think that battery did not have enough juice in it to excite alternator originally). That's correct The charge light stays on when revving engine, also rev counter does not work

My engine battery alternator does not 'excite' and it doesn't charge. If I keep starting engine then turn off engine a few times the starter motor starts clicking and not turning the engine (battery dead). However if I then jump start the battery the engine will start and alternator will charge. Any ideas peeps

There's No fittings/ bleed valve at top of rad only the feed in and out ( with valves ) at the bottom of rad

There's nothing at the top of the rad, it's a completely sealed unit apart from the two valves at the bottom .

I've a radiator that has a pin hole in it and I'm going to repair it, however there is no bleed valve at the top of the radiator and I was wondering how I would go about bleeding the system ( webasto Evo top ). Any ideas please.

I only asked if webasto needs to run because the circulation pump is only on when webasto is running and I thought it might need to be on to fill/bleed the radiator.

My bedroom radiator needs replacing due to a pin hole that leaks. When I fit new radiator do I need to start webasto up to fill/bleed the new radiator. Thanks in advance

i see what you mean Loddon , the problem is i have never taken shoreline off .The boat only has a wifi reuter and battery charger connected and everything else is 12v. So no sudden spikes etc. I have had a new boat moored behind me sharing the same bollard .before they moored there there were no other boats in there place so im wondering if the extra load that they are drawing is causing it !!!!