Stator

[duhn]

What is the correct stator part number for my motor?
86 150 hp black max.
SN# a942647
No voltage regulator

Thanks

 

[Laddies]

Re: Stator

Cdi # 174-5456

 

[duhn]

Re: Stator

Thanks Laddies,
Did you have that memorized or did you have to look it up?

 

[Laddies]

Re: Stator

I looked it up my memory is shot.

 

[duhn]

Re: Stator

Im bringing back an old thread that I started back in January. I'm now looking to buy a new stator and during my shopping I came across a couple of questions.
Websites that sell Merc. parts state that my stator should be 398-5454a32. I'm assuming that I have 1/2" lamination cause that is what is on my motor now. Another website states that this is the part number only if there is a voltage regulator not a rectifier. Since I have a rectifier is this not the correct part?
Laddies states that CDI 174-5456 is the part number, but when i look it up, it doesn't state that it replaces 398-5454a32, nor does it say anything about rectifier, voltage regulator, 5/8" or 1/2" lamination.

I dont know which one to get. Am I over thinking this?

 

[sschefer]

Re: Stator

Im bringing back an old thread that I started back in January. I'm now looking to buy a new stator and during my shopping I came across a couple of questions.
Websites that sell Merc. parts state that my stator should be 398-5454a32. I'm assuming that I have 1/2" lamination cause that is what is on my motor now. Another website states that this is the part number only if there is a voltage regulator not a rectifier. Since I have a rectifier is this not the correct part?
Laddies states that CDI 174-5456 is the part number, but when i look it up, it doesn't state that it replaces 398-5454a32, nor does it say anything about rectifier, voltage regulator, 5/8" or 1/2" lamination.

I dont know which one to get. Am I over thinking this?

Laddies part number is correct. Yours is a 9amp stator and you only need a rectifier. You can upgrade to a 174-5456-16 16 amp stator and order the required rectifier/regulator if you want better charging capabilities.

 

[duhn]

Re: Stator

Thanks that helps alot.

 

[duhn]

Re: Stator

You can upgrade to a 174-5456-16 16 amp stator and order the required rectifier/regulator if you want better charging capabilities.

I actually wouldn't mind a better charging system, With a bait tank an all. What would be the procedure for this voltage regulator?

 

[Dukedog]

Re: Stator

Tha 5456 is a 9amp. Replaces tha 5454a7. Tha 5454a32, 5454a35 are 16 amp. Some of tha 16s had both regulator and rectifier. Some only had tha rectifier which is probably what you have from what you said eariler. That serial range shows a regulator in Mercury parts but Iv'e seen it both ways on tha earlier Mercs. Either way you should have a 16 amp already.........

"only if there is a voltage regulator not a rectifier"
All 9 and 16 amp systems have a rectifier. Some 16's have BOTH. They combined both to one piece when they went to tha 40amp stuff.

 

[duhn]

Re: Stator

For sure I have a rectifier, If I had both where would the voltage regulator be on the motor?

 

[Dukedog]

Re: Stator

Rear, top of block, between tha heads. 'bout 2" square. Red, yellow wires going to tha rectifier...............

 

[sschefer]

Re: Stator

For sure I have a rectifier, If I had both where would the voltage regulator be on the motor?

There were two types of regulators that might have been used on your engine depending on how original it is. One regulator type is located under the coil mount and is actually inside the exhaust divider and water cooled. Merc doesn't make them anymore. The other type is a small rectifier that is mounted at the rear of the flywheel on top of the block and between the two heads. It connects to the trim solenoid main power and that connects it the battery. I don't think Merc makes those any more either.

CDI makes a regulator for both the 9 and the 16. There is a school of thought that say's it's not necessary to regulate a 9 amp because it only puts out about 13.5-14.5 volts normally. The 16 amp can put out 15-17 volts easily so you need to regulate it back to 13.5-14.5. The 40 amp stators use 2 regulators and are designed to support multiple batteries without needing a isolator. You still need an isolator if you want to charge a 24v tripple battery system. (2 bats for 24v devices and 1 bat for 12v starting).

I have nearly the same engine as you and run the 16amp CDI with a single CDI recitier/regulator. I've removed the original Merc recitifer that is on the electrical plate next to the starter solenoid and the small merc regulator. The CDI rectifier/regulator mounts on a supplied heat sink plate in the same spot as the original small regulator. Connecting it up is easy, just follow the CDI instructions if your not already familar with wiring on these beasts.

If by chance you have the regulator in the exhaust divider and it's not leaking, just leave it. If it's leaking then you can either make or order a cover plate from Merc (still available) and either make a gasket or use a Merc original.

Best of luck the part numbers for CDI stuff that Laddies and I gave you are correct. If you choose to order the 16 there will be a note on the website that tells you which rectifier/regulator must be used with it.

Just a side note/recommendation - You might consider changing your trigger and switchboxes over to CDI while your at it. It's generally recommended but not required.

 

[Dukedog]

Re: Stator

Unless you have a "FrankenMerc" like sschefer, which i don't think you do, all you need is tha 5454a32(which is called for by your ser. # along with a regulator) and be done with it. But like I said there were some 16s that came from Merc without one. Even without a regulator if you run any kind of electrics at all ie: pumps, depth finders, TnT, radio and such you won't have an overcharge issue unless you run for miles and miles with nothing turned on but tha motor. There is also no reason ta change anything thats workin'. Switch boxes in pairs is suggested when ya lose one but with tha 16 amp electric system tha trigger, rectifier and regulator (if you have one) normally outlast several stators unless tha stator takes a really serious dump..........

But what do I know since I took my first v6 apart in '76 right after I got it outta tha big brown Mercury box.

 

[j_martin]

Re: Stator

Like Duke says, just the rectifier works fine. Just be sure you keep up with the battery maintenance. It will use a little water. If it's kept up, you won't really lose enough battery life to make any difference.

Don't bother trying to get one of the top of the block mercury shunt regulators. They don't make them anymore because they were better at starting fires than regulating the voltage.

If you really want top shelf, rig a new rectifier/regulator, either CDI, or one from mercury. (like scheffer did) You can use one of the pair that comes with a 40 amp setup and it'll work fine. It also takes a bit of load off the stator, possibly improving stator life and switchbox energy. If you look for a used one, the black potted one with 6 wires (one ground) is best. The clear potted one with 5 wires is noted for early failure in 40 amp systems. It's second best. For new, CDI is the best bet.

The flywheel for 9 amp and 16 amp is essentially the same.

hope it helps
John

 

[duhn]

Re: Stator

Rear, top of block, between tha heads. 'bout 2" square. Red, yellow wires going to tha rectifier...............

Ding,Ding,Ding....
There is a voltage regulator on my motor. I was wondering what that little box at the top of the motor was.
So I will be getting the 174-5456-16. I'll be doing the new CDI regulator at a later time.
I do have 2 CDI switch boxes on order, and will be ordering the stator. Would I be making a mistake if I didn't replace the trigger also?

 

[Dukedog]

Re: Stator

Might as well if your changin' tha rest anyway. Do you have a manual? When you change tha trigger your gonna need to do all tha timin' routine so be prepared..........

 

[sschefer]

Re: Stator

Might as well if your changin' tha rest anyway. Do you have a manual? When you change tha trigger your gonna need to do all tha timin' routine so be prepared..........

Agree....

If you do order the trigger, put this in your back pocket... CDI has been known to put the yellow band on the wrong set of wires. If you hook it up and you can't find the timing on #1 then check it on #2. If it's good on #2 then swap the trigger wires on the switchboxes. This just happened to me and made me crazy for a couple of days. It's no biggie once you figure it out.

Hey Dukedog, that's a "Screamin Frankin Merc". Had it out testing on the lake and had no less than two other boater compliment me on how my 200 was performing out on the water... I never let on that it was just a 135. But... I sure did smile a lot Now my dilema is which stickers to put on the new cowling.

 

[sschefer]

Re: Stator

Just a quick note about the CDI -16 stator, CDI say's that it does require the use of the CDI rectifer/regulator. It has the second smaller red wire that is the voltage sensing circuit. Your stock merc regulator doesn't have it.