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Charging System Issue? Voltage Alarm

VitaminSea

Jetboaters Commander
Messages
745
Reaction score
525
Points
197
Location
Central FL
Boat Make
Yamaha
Year
2012
Boat Model
SX
Boat Length
21
I have a 2012 210SX - Voltage Alarm on Starboard engine when flushing (not Port), 16.7-16.8V. Could I need to replace my stator or something else?

Backstory: During our last outing, I received a voltage alarm during our cruise back from dinner. I acknowledged the alarm, and continued on our way back to the dock (~15 min cruise). I had figured it was time to swap out the batteries, as they are approx 3.5 years old. I have replaced one of the batteries with a new AGM battery, and also tested both to of the older batteries. They seem to charge w/o issue, and hold a charge >12.6V after sitting in the garage for over a week.

Today, I was doing some work on the boat and wanted to flush both engines. I flushed the port engine for 10 mins, no issue. Fired up the starboard engine, and within ~2 mins the battery alarm was going off. In my head, I said, well maybe its time for a 2nd new battery; then I switched to battery “B”, the new AGM battery, and the alarm went off. About 5-6 mins later the alarm returned, this time I decided to cycle through the gauge read outs, and I saw that the voltage was reading 16.7-16.8V. After a few minutes it returned to reading 14.6-14.8V range. Also to note, I have a simple Perko A/B charger, A is my older battery, and B is the new AGM cell.

What could be causing this? I have the service manual, and there isn’t much info regarding the Charging System/Stator, other then checking if with a 3 pin harness, that I do not have. I can’t even tell from the diagrams, where the stator is located... (not sure why my shop manual has the red water mark, maybe it was a bootleg version I purchased?)

Just wondering if I risk damage by seeing if this continues to alert when I am out on the water, or if there is other action I need to take now.

Thanks!

296773F1-DCE6-4755-BA4C-71EDC3E183F2.jpeg6246710F-732C-42BE-9829-8663F9717075.jpegED2E146B-2E9B-4BDC-AB72-68316161AF32.png
 
I’ve been scouring the web, and reading up since I posted. This posting is very similar to my experience - and mentions the issue was the regulator, which makes sense to me.


From everything I can see, the regulator is rather straight forward to replace. Is there any reason why I would need to stick to the OEM part here? OEM is $150-$200. This came up on eBay, and its a fraction of the cost...

Any thoughts?
 
Stator assembly is located in Generator section. There are some loads unique to starboard engine: bilge pump and fuel gauge being two. There may be others. I think they could be a factor in the alarms/readings you are getting. Replacing battery could be better place to start. Less expensive than regulator
 
Stator assembly is located in Generator section. There are some loads unique to starboard engine: bilge pump and fuel gauge being two. There may be others. I think they could be a factor in the alarms/readings you are getting. Replacing battery could be better place to start. Less expensive than regulator

Thanks for the feedback. Didn’t realize that some loads are unique to each engine. How would that work in an environment where you are running on one engine? For example, when running on only one engine while flushing, I still see the fuel guage in the multi function display portion of the running engine’s tach.

I have two batteries, one being new, The issue presents itself while running on either battery.
 
The fact that your voltage alarm is a high voltage indicates a bad regulator/ rectifier, especially since the alarm does not come on when then other engine is running. I’m assuming you have the OEM battery switches and DVSR? If this is the case your batteries are in parallel when you get this alarm, further indicating the problem is with the one engine, since it doesn’t happen with the other engine running.

IMHO do not mess around with some generic reg / rectifier, get an OEM part.

I don’t know for sure, but I would not mix battery types E.G. flooded and AGM.
 
Last edited:
@VitaminSea Sorry for the misinformation. The only load unique to the Starboard engine on my 2007 SX230 is the depth finder.
 
The fact that your voltage alarm is a high voltage indicates a bad regulator/ rectifier, especially since the alarm does not come on when then other engine is running. I’m assuming you have the OEM battery switches and DVSR? If this is the case your batteries are in parallel when you get this alarm, further indicating the problem is with the one engine, since it doesn’t happen with the other engine running.

IMHO do not mess around with some generic reg / rectifier, get an OEM part.

I don’t know for sure, but I would not mix battery types E.G. flooded and AGM.

Thanks for the feedback. Stock my boat only came with 1 battery, prior owner added a Perko A/B/A+B switch/OFF. For two seasons, this has treated me fine, generally only using 1 battery on an outing, and knowing I have a back-up. I do not run in the A+B setting. Eventually, I’ll be replacing the flooded cell with another AGM (was trying to determine if I could fit two size 27’s w/o reworking everything). I’ve also considered the BlueSea “Add A Battery Kit”, with ACR, but since the existing set up works for me, I’ve prioritized other “projects”.

Rectifier/Regulator ordered. Will update come next weekend (assuming the part arrives in time).
 
Thanks for the feedback. Stock my boat only came with 1 battery, prior owner added a Perko A/B/A+B switch/OFF. For two seasons, this has treated me fine, generally only using 1 battery on an outing, and knowing I have a back-up. I do not run in the A+B setting. Eventually, I’ll be replacing the flooded cell with another AGM (was trying to determine if I could fit two size 27’s w/o reworking everything). I’ve also considered the BlueSea “Add A Battery Kit”, with ACR, but since the existing set up works for me, I’ve prioritized other “projects”.

Rectifier/Regulator ordered. Will update come next weekend (assuming the part arrives in time).

Right on... Just to be clear, you got the high voltage alarm when using either battery, one at a time, and only on the one engine?

I know what you mean about prioritizing projects! I really like the DVSR set up as it is automatic, no muss no fuss, I’m sure you will love it once the priority list puts that at the top. My Dad had a set up like yours on his sea Ray many years ago and he was never left stranded.
 
Installed the new regulator this morning. Ran the engine on the hose for 15min and voltage stayed in the 14.2-14.4 range.

Fingers crossed all is well for tomorrow’s outing.

In case anyone is wondering, it’s a five minute fix. Two bolts and 1 wiring harness.


6A3DE31B-202A-43E0-B681-E0437885C102.jpeg
 
Installed the new regulator this morning. Ran the engine on the hose for 15min and voltage stayed in the 14.2-14.4 range.

Fingers crossed all is well for tomorrow’s outing.

In case anyone is wondering, it’s a five minute fix. Two bolts and 1 wiring harness.


View attachment 146431

That’’s awesome !!!
 
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