Hello
I have a Yamaha outboard, F80 model year 2002. The actual type and serial is F80AET L 1000795 Q
The regulator seems to be blown and sends 17V to the battery depending on revs etc. Only on very low revs, idle, do I get 13.8V. Anything over that and we see the voltage increasing up to 17+ V.
A few weeks ago I disconnected the negative terminal from the battery while on a short trip trying to save the battery from abuse. Bad idea as I did not have engine trim and the engine instruments were showing rubbish. When I reconnected the battery, it miraculously started working again at a stable 13.8V or thereabouts, regardless of revs.
I was told that rusty connectors do that, and I thought my action of removing the terminal and reinserting it did the trick. In addition I later filed, cleaned and polished the terminals and the battery is also brand new.
5 weeks later and daily use of the boat, I was telling a friend the story, how I fixed the overvoltage problem with cleaning the terminals, and as I revved the engine to show him, I saw 15+ Volts.
We measured the voltage on the engine and the problem seems to be the regulator. As it is hard to find a replacement in short notice, it is not a piece stores stock, and it is holidays now here in Greece, is there a trick I can do to preserve the battery?
Each battery pole has two leads to it, a thick and a thinner one. The thick lead I presume drives the starter motor. But does it also charge the battery? Then once started I could remove just the thick lead.
Any suggestions welcome.
I have a Yamaha outboard, F80 model year 2002. The actual type and serial is F80AET L 1000795 Q
The regulator seems to be blown and sends 17V to the battery depending on revs etc. Only on very low revs, idle, do I get 13.8V. Anything over that and we see the voltage increasing up to 17+ V.
A few weeks ago I disconnected the negative terminal from the battery while on a short trip trying to save the battery from abuse. Bad idea as I did not have engine trim and the engine instruments were showing rubbish. When I reconnected the battery, it miraculously started working again at a stable 13.8V or thereabouts, regardless of revs.
I was told that rusty connectors do that, and I thought my action of removing the terminal and reinserting it did the trick. In addition I later filed, cleaned and polished the terminals and the battery is also brand new.
5 weeks later and daily use of the boat, I was telling a friend the story, how I fixed the overvoltage problem with cleaning the terminals, and as I revved the engine to show him, I saw 15+ Volts.
We measured the voltage on the engine and the problem seems to be the regulator. As it is hard to find a replacement in short notice, it is not a piece stores stock, and it is holidays now here in Greece, is there a trick I can do to preserve the battery?
Each battery pole has two leads to it, a thick and a thinner one. The thick lead I presume drives the starter motor. But does it also charge the battery? Then once started I could remove just the thick lead.
Any suggestions welcome.