92 Mariner EFI 175 Magnum voltage issue

[eng208]

I've got an issue with voltage issue on an old 92 Mariner Magnum EFI. It is the same as the Mercury Black Max 175. Anything below 2300 RPM and the voltage is erratic, going from 10-14 rapidly. Above 2300, and voltage stays at about 14 v. Any help as to what this issue might be? I have intermittent hard starting problems after it gets warm also and idle drops after heating up to operating temp. When cold, it starts easily and runs smooth, just has this voltageissue.

I pulled the manual and started testing per the manual. I got to the voltage regulators and checked the two short yellow wires. According to the manual, it should be no resistance across these. On the stator side, I do have no resistance but on the voltage regulator side, I have about 1700K ohms. Really friggin high. The diode check failed also. It showed open. Is there someone that can confirm this is the correct test before I spend 400 dollars on two regulators?

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[TEXAS20225]

ive bought so many of these it aint funny they are good every time http://www.ebay.com/itm/322012370585...%3AMEBIDX%3AIT check it out save yer money for fishing tackle

[eng208]

ive bought so many of these it aint funny they are good every time http://www.ebay.com/itm/322012370585...%3AMEBIDX%3AIT check it out save yer money for fishing tackle

Thanks for the link. I think those regulators will work, however, my unit is a single unit that goes into the cooling jacket. CDI has a replacement kit for it. Does anyone know where I could get just the plate and then mount the regulators?

This is actually a post from a member here with the exact same dilemma. Anybody know the solution?
http://www.screamandfly.com/showthre...al-20-amp-regs

I have found out it is called the 40 AMP water cooled rectifier/regulator and wouldn't you guess it? Mercury quit using them in 91. I guess my motor is a 91 on a 92 boat. I found CDI's replacement upgrade kit for 517. That would upgrade the stator and regulators with new CDI units. Or, for 385, I can order the CDI replacement water cooled unit and take a chance with my stator, which is original and 25yrs old. Then I would have to buy a stator and stick with the two wire which costs about 395. Seems a no brainer to replace with the complete upgrade CDI kit..... Any suggestions?

http://www.lowcostboatingstore.com/C...p_p_37895.html

[TEXAS20225]

oh i did not know you had a water cooled reg there is no conversion for these unless you change stator to a four yellow wire unit!!! sorry Bummer

[rock]

I may have one. I will look later today when I get out in the shop.

Rock