I have a 1988 MERCURY V6 150 Blackmax on a 18ft mustang boat will do 100kms..
Question.......when my boat is running at idile it sits on 12.5volt when i raise the RPM it can get as high as 17volts. If i turn the stereo on it will lower the volts back down to 12 to 13 the louder the stereo the lower the volts get. This problem only started after I installed a 1200watt amp with 4 x 310watt 3ways and 1 x 1000watt sub, stereo amplifier main power is connected to master kill switch . I run twin batteries which are both new marine batteries all hooked up to a Narva Battery Master Rotary Isolator Cut Off Kill Switch 4 Positions (bat 1, bat 2, both bat, off) pictured below.
I'm guessing its the rectifier do you think this is my problem or could it be more???, Thanks Andrew
Question.......when my boat is running at idile it sits on 12.5volt when i raise the RPM it can get as high as 17volts. If i turn the stereo on it will lower the volts back down to 12 to 13 the louder the stereo the lower the volts get. This problem only started after I installed a 1200watt amp with 4 x 310watt 3ways and 1 x 1000watt sub, stereo amplifier main power is connected to master kill switch . I run twin batteries which are both new marine batteries all hooked up to a Narva Battery Master Rotary Isolator Cut Off Kill Switch 4 Positions (bat 1, bat 2, both bat, off) pictured below.
I'm guessing its the rectifier do you think this is my problem or could it be more???, Thanks Andrew
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