mercury 135 v6 86_88

[Azi]

hi can anyone help me regarding voltage regulator. sits on top of motor, 2 srews, 2 wires (red and tan or white ). it is disconnected for whatever reason, I want to hook it back up, but no idea where it goes. tried in a manual, doesnt show voltage reg in any wiring diagrams, thanks

 

[Doug57]

Re: mercury 135 v6 86_88

JMartin or DukeDog can tell you for sure, but that's more than likely a stabilization module. If so take it off and throw it as far as you can. Mine cost me two cylinders.

 

[Dukedog]

Re: mercury 135 v6 86_88

Don't think those are supposed to have a reg. on 'em. Who disconnected it and why?
Is about 2" square, mounted on top rear of tha powerhead?..........

Oops. '86, '87 did have tha reg.........

 

[j_martin]

Re: mercury 135 v6 86_88

The one on top with screw terminals is a combination regulator and engine fire igniter. Maintain your battery and take it off. There's a reason why it's NLA at Mercury.

If you are running long hauls and cooking too much electrolyte out of your battery, replace the rectifier with a later 20 amp regulator. Takes some rigging and splicing, but it's the best solution. Usually it's not worth the expense in a recreational boat.

hope it helps
John

 

[Azi]

Re: mercury 135 v6 86_88

hey thanks for the quick response, I am auto mechanic by trade. Alarm bells tell me that you need a reg so voltage does not exceed max allowed.
All components are designed for 12v ( max 15 or 16v I guess ). High voltage can cause overheating and failure of electronic components.

 

[Azi]

Re: mercury 135 v6 86_88

The one on top with screw terminals is a combination regulator and engine fire igniter. Maintain your battery and take it off. There's a reason why it's NLA at Mercury.

If you are running long hauls and cooking too much electrolyte out of your battery, replace the rectifier with a later 20 amp regulator. Takes some rigging and splicing, but it's the best solution. Usually it's not worth the expense in a recreational boat.

hope it helps
John

Hey John, is it true it causes fires ???????

 

[Dukedog]

Re: mercury 135 v6 86_88

John and I dissagree on this. I've never seen or heard of one startin' a fire till John said something about it. Any electric part can do that if its screwed up. I ran them for years and still run 'em on tha Bridgeport and tha 260 without a problem. They didn't go nla till a few years after tha 260 went away which was tha last motor ta use 'em (replaced by 280)..........

He is right about not necessarily needing it. If ya got a lot of electrical things working along with good battery maintance no one I know has had a problem without it.....................

 

[j_martin]

Re: mercury 135 v6 86_88

I have a lot of Merc wiring diagrams. Only a couple just before the infamous wet 40 had a regulator on them, and the rectifier connected directly to the battery at the starter solenoid. The few that had a regulator on them also have an inline 20 amp fuse between the rectifier and the solenoid.

It's possible that some got by without the fuse, and if the regulator failed on one of those, it would catch fire. I've heard of it and answered a few threads about it.

With or without it, with proper battery maintenance, there is little difference. When the battery is fully charged and goes into electrolysis, it effectively regulates the voltage. A fresh battery will hold it down to 14.5v or so, and an older one under 16. If you let the battery electrolyte get low, the voltage will get higher.

I forgot what the labels are on the regulator, but it needs to be bonded to ground (mounted tightly) and there's a red wire that goes to the red + terminal on the rectifier, and a yellow wire that goes to the yellow wires on the rectifier that does not connect to the tachometer. (gray) I'm guessing the marks on the reg would be + and ~ for red and yellow.

hope it helps
John

 

[Dukedog]

Re: mercury 135 v6 86_88

John, not ta be pissy but none of my diagrams on tha 15/16 amp system w/reg. show a fuse on tha red coming from tha regulator? Tha only fuse I've seen is in tha ign. and trim circuit. Or are you refering to tha 40 amp POS................

 

[Jonezin]

Re: mercury 135 v6 86_88

I know this has nothing to do with the topic but I need some help

I have a 88 merc 135 v6 #B278681.
My family has had this boat since new, now i have it. I did the grounding test nothing happened. I ordered new thermostats and water pump kit. I have a leak in the exhaust plate cove got those gaskets ordered. my temp runs 180-190 at 3500 rpm cursing speed. How close to danger am I?

I would like to put in a buzzer, but I'm a little confused. There is only 1 wire coming from the sensor that goes to this screw, how do I do this, do I take that lead off the screw and splice it to the ground for the buzzer. If you have a diagram that would help me a lot.

My dad gave my brother this boat a few years ago and he didn't give a **** about it,I've loved it from day one. So it has mostly sat in his shop. Well this year he pulls it out wont fire he has all kinds of work done to it, carbs rebuilt new stator injector and fuel pumps rebuilt new coils, everything shy of pulling the head. Wont fire, no spark. So he calls me ask me if I want it, hell yes its my dads Sea Ray Servile if for no other reason. I get it check it out change 2 fuses on the motor and one under dash fires right. Aint life sweet.

But I'm worried she running to hot, everything I could fine calls for 140 degree thermostats,40 less then where we at now. water is very hot out the pisser port. What you think?

 

[sschefer]

Re: mercury 135 v6 86_88

I know this has nothing to do with the topic but I need some help

I have a 88 merc 135 v6 #B278681.
My family has had this boat since new, now i have it. I did the grounding test nothing happened. I ordered new thermostats and water pump kit. I have a leak in the exhaust plate cove got those gaskets ordered. my temp runs 180-190 at 3500 rpm cursing speed. How close to danger am I?

I would like to put in a buzzer, but I'm a little confused. There is only 1 wire coming from the sensor that goes to this screw, how do I do this, do I take that lead off the screw and splice it to the ground for the buzzer. If you have a diagram that would help me a lot.

My dad gave my brother this boat a few years ago and he didn't give a **** about it,I've loved it from day one. So it has mostly sat in his shop. Well this year he pulls it out wont fire he has all kinds of work done to it, carbs rebuilt new stator injector and fuel pumps rebuilt new coils, everything shy of pulling the head. Wont fire, no spark. So he calls me ask me if I want it, hell yes its my dads Sea Ray Servile if for no other reason. I get it check it out change 2 fuses on the motor and one under dash fires right. Aint life sweet.

But I'm worried she running to hot, everything I could fine calls for 140 degree thermostats,40 less then where we at now. water is very hot out the pisser port. What you think?

I just put up a wiring diagram for you on your other post. Yes 180-190 is too hot but the real question is wheter your gauge is right. Put a thermometer in the tell tale stream and get a reading from it.

 

[Jonezin]

Re: mercury 135 v6 86_88

OK thanks will do Friday.

 

[j_martin]

Re: mercury 135 v6 86_88

John, not ta be pissy but none of my diagrams on tha 15/16 amp system w/reg. show a fuse on tha red coming from tha regulator? Tha only fuse I've seen is in tha ign. and trim circuit. Or are you refering to tha 40 amp POS................

On the diagram, the red goes into the harness, where a spliced lead goes through a 20 amp fuse and back to the battery terminal on the starter solenoid. On most of the diagrams I have it is a bit obscure and spans two pages.

The primary purpose of the fuse is to isolate the entire small gauge wiring system from the battery if a short occurs. The rectifier/regulator output goes into the system on the system side of the fuse.

hope it helps
john