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04-04-2017, 08:05
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#1
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Registered User
Join Date: Apr 2017
Boat: 1964 Chris Craft Sail Yacht 35'
Posts: 25
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Honda 9.9 Charging issues
I'm going to start the thread here first before I more over to engines.
I searched around this forum and could not find what I was looking for so here goes.
2006 Honda 9.9 long shaft outboard. We brought the boat up the Hudson last fall and the charging system on the outboard is not working. This is a new old boat for us. We did connect an inverter to the battery and was told we might of fried the charging system just not sure what.
Any help for the young new guy would be greatly appreciated.
Mike
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04-04-2017, 08:25
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#2
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Registered User
Join Date: Nov 2016
Posts: 374
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Re: Honda 9.9 Charging issues
Have you checked to see if you are getting amps out of the battery cables that go from the engine to the batteries?
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04-04-2017, 08:35
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#3
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Registered User
Join Date: Apr 2017
Boat: 1964 Chris Craft Sail Yacht 35'
Posts: 25
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Re: Honda 9.9 Charging issues
It's off the boat now in my garage. We did stop at a marina on the way up last fall and he put a multi meter to the outgoing charge terminal and was not getting the correct read.
There is not terribly much to the system. Looks like a Regulator assembly and a charge coil.
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04-04-2017, 08:36
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#4
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Registered User
Join Date: Apr 2017
Boat: 1964 Chris Craft Sail Yacht 35'
Posts: 25
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Re: Honda 9.9 Charging issues
outgoing charge terminal on the motor
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04-04-2017, 09:57
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#5
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Registered User
Join Date: May 2008
Location: Nova Scotia until Spring 2021
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,976
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Re: Honda 9.9 Charging issues
As I recall, having owned a BF100 a few years ago, it's a dynamo. It produces little at idle but a lot (3 or 4 amps, again, from memory) at WOT.
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04-04-2017, 10:06
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#6
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Honda 9.9 Charging issues
Quote:
Originally Posted by miked40
It's off the boat now in my garage. We did stop at a marina on the way up last fall and he put a multi meter to the outgoing charge terminal and was not getting the correct read.
There is not terribly much to the system. Looks like a Regulator assembly and a charge coil.
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You know I think its like an older motorcycle, it is a rectifier and a charge coil.
99 times out of 100 its the rectifier that goes bad, that is assuming its like a motorcycle, which I bet it is
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04-04-2017, 10:35
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#7
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Registered User
Join Date: Apr 2016
Location: Back on dirt in Florida
Boat: Currently in between
Posts: 1,338
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Re: Honda 9.9 Charging issues
Quote:
Originally Posted by a64pilot
that is assuming its like a motorcycle, which I bet it is
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Being a Honda I would bet a nickel you are right!
__________________
SV Bacchus - Living the good life!
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04-04-2017, 10:43
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#8
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Honda 9.9 Charging issues
What kills the rectifier on a motorcycle is heat, if i remember right, the power output is fixed, say 5 amps for example, if the bike only uses 2 amps, then the other three is wasted as heat in the rectifier, that is why they are so heavily finned, to dissipate heat
Read the permanent magnet generator part, I bet that is how an outboard works, I know the old ones worked this way and I bet the little ones still do.
Technical Article: How a Motorcycle Charging System Works - ElectroSport
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04-04-2017, 12:19
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#9
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Registered User
Join Date: Sep 2011
Location: Toronto
Boat: Grampian 26
Posts: 167
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Re: Honda 9.9 Charging issues
If I may. I had a Honda 100 on the back of my Grampian 26 for 30 years. It is a very reliable motor. One thing I learned was that it really didn't keep your batteries charged the way even one small solar panel would. I replaced it with a Tohatsu and didn't pay extra for the alternator. No regrets.
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04-04-2017, 14:24
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#10
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Registered User
Join Date: Apr 2017
Boat: 1964 Chris Craft Sail Yacht 35'
Posts: 25
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Re: Honda 9.9 Charging issues
Thanks guys.
Well she's open, so the finned unit is the rectifier/regulator? It has to be there isn't much more in here. One side has the oil filter fuel lines, up top is the starter pull and my side it the plugs some wiring. Hopefully that picture went through.
So that finned unit would be the best place to start?
Thanks in advance,
Mike
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04-04-2017, 14:49
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#11
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Registered User
Join Date: Apr 2017
Boat: 1964 Chris Craft Sail Yacht 35'
Posts: 25
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Re: Honda 9.9 Charging issues
So I did also come across this in the manual online.
The outboard motor’s 12-volt output
is designed to charge a ‘‘starting or
cranking’’ battery only. It is not
intended to charge a ‘‘deep-cycle’’
type battery. Lights and electrical
accessories for the boat should be
connected to the battery.
And yes it is hooked up to a deep cycle, previous owners set up. I found out that it puts out 6 amps. I could of swore that it would of charged our battery some the 8hrs during the day when we were not drawing on the battery???
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04-04-2017, 15:11
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#12
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Registered User
Join Date: Nov 2015
Location: Western KY - US
Boat: 1984 Merit 25
Posts: 121
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Re: Honda 9.9 Charging issues
My Honda (9 hp +/-)(not sure) has a modular plug that plugs in the starboard side of the engine. Does yours have one of those? Mine is most likely older that yours, but not by much.
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04-04-2017, 15:28
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#13
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Registered User
Join Date: Apr 2017
Boat: 1964 Chris Craft Sail Yacht 35'
Posts: 25
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Re: Honda 9.9 Charging issues
Is this what you are referring to?
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04-04-2017, 16:03
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#14
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Registered User
Join Date: Nov 2015
Location: Fl
Boat: Wauquiez Hood 38
Posts: 1,187
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Re: Honda 9.9 Charging issues
__________________
Keth
Boat Vinyl Lettering and Graphics
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04-04-2017, 16:03
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#15
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Honda 9.9 Charging issues
Quote:
Originally Posted by miked40
Thanks guys.
Well she's open, so the finned unit is the rectifier/regulator? It has to be there isn't much more in here. One side has the oil filter fuel lines, up top is the starter pull and my side it the plugs some wiring. Hopefully that picture went through.
So that finned unit would be the best place to start?
Thanks in advance,
Mike
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I'd bet money on that being the rectifier / Regulator.
However before I spend your money I'd check the charging coils first with a multimeter, easy to do. I have never found one bad, but I have limited experience.
Can you get a manual? It should have the procedure, resistance values for the coils etc. .
That looks exactly like the rectifier on my old CBR 1100XX which was the last one I changed.
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