1998 yamaha 200 hp 2 stroke - High Voltage alarm - fluctuates between 15-17 volts

[mobilereef]

I had a high voltage alarm sound on my VHF, and noticed it was fluctuation between 15-17 volts. Can anyone help me figure this out? I am thinking since I cleaned and tightened the battery terminals, it must be the voltage rectifier, but any pro input would be appreciated. Thanks and have a great day.

 

[ondarvr]

The rectifier changes it from AC to DC, the voltage regulator does exactly what it's name indicates, so that's where the problem is. I don't know on this motor if they are combined as one unit, or separate.

 

[mobilereef]

Thank you so much. I will start there and let you know what I find out. Much appreciated

 

[mobilereef]

I changed out the voltage regulator and it fixed the issue. It seems now the motor is having a hard time staying at idle without stopping. I tried to raise the idle, but it made it worse. Any suggestions?

 

[dingbat]

Voltage regulators are notorious for taking out upstream electronics when they go bad. Make sure you have spark at all plugs at idle. It could be a bad battery pulling the system down as well..

 

[mobilereef]

I run tested the batteries prior to changing out the voltage regulator, and the guys at o'reily said they were good. Now my questions is how do I test if I have a spark at idle on all plugs? I tried to launch this morning and it just did not sound right. I loaded back up and came home. Last thing I need it to be 40 miles out with a dead motor. Please forgive my ignorance on these issues. I am learning as I go with your help. I really do not know what is "upstream" from the regulator!

thanks in advance for your time.

Chris

 

[dingbat]

"Upstream" of the regulator is the entire ignition system. A lot of times a failed regulator will take out the power pack.

You need a spark tester to check for spark. you can pick up up at most automotive parts suppliers

 

[mobilereef]

Ok well that is where I will start! it really sounds to me like what you mentioned is the case. All of the sudden the starter sounds strange, it will not idle correctly. I will buy one this week and read the directions on how to use it. Thanks a ton for your advice. if you are ever fishing in the orange county, CA area, I have a few boats i can get you out on free of charge to get some Marlin or Tuna, whatever is biting. Can I hit you up once I test this thing? Is a "power pack" something that I can do fairly simply with proper instruction manual? Thanks again for taking the time dingbat (or whatever your name is!)

Chris