1993 force 120hp stator

[ddzurik]

I just bought a stator online for my 93 120hp outboard. I bought the exact part number from the manual
and it is a 20 pole stator. I just pulled my flywheel of the motor and the one on the engine is completely different.
It is black epoxy covered and only has 12 poles and has the number 398-8778a24 stenciled on it. also the wire colors are
different brown,red,white w/b and w/y. Any idea what I have? What do I replace it with.
Thanks for any help. Dave

 

[jerryjerry05]

Re: 1993 force 120hp stator

That year came with 2 types stators.
Your's is the later model by Mercury.
The 20pole is prestolite/Force.
Won't work,try to send it back???
You sure the one you have is bad??
Tell us(in detail) what's going on.
Fill out the profile,loction?
After a compression/spark test? Use the test procedures.
I use the test procedures from outboard ignition . com
Post the results???

 

[pnwboat]

Re: 1993 force 120hp stator

Like Jerry says, definitely the wrong stator.

CDI Electronics makes a replacement. They are available here on IBOAT and other sites on line too.

Direct replacement for yours with 9 AMP battery charging coil is P/N 174-8778K1.

 

[ddzurik]

Re: 1993 force 120hp stator

Thanks for the replies.
I ohm out the red and red/white at 90 ohms. The blue and blue/white are at 6020 ohms.
Neither are shorted to ground. The cdi troubleshooting guide said the reds at 80 ohms and the blues
at 3500 ohms for a cast flywheel and 5000 to 7000 ohms for a flex flywheel. How do I know which flywheel
I have. If it is the flex flywheel my stator is close to spec. Since the lower number is higher than spec
what do you think it can cause an idle problem in gear?
Thanks Dave

 

[pnwboat]

Re: 1993 force 120hp stator

Your stator has a low speed winding, and a high speed winding. I don't see any reference to a cast flywheel or flex flywheel. As far as I know, you have a cast flywheel. According to my manual the high speed winding Red to Red/White should be reading 75-90 OHMs. The low speed winding Blue to Blue/White should be reading 3250 to 3650 OHMs. If yours is reading 6020 then it's bad. Since this is the low speed winding, yes it will probably affect low and idle speed performance.

NOTE: I looked at the CDI site and looked at the 1993 stators for 120 HP. It indicates that it should be a 174-2075K1. This stator is typically used for Mercury ignition systems that use CDM ignition coils without a switch box. I then looked at the 1992 120 HP ignition stators and it showed both the 174-2075K1 stator and the 174-8778K1 stator depending on whether you have a switch box or not. If you have the switch box I'm pretty sure you need the 174-8778K1 stator. The wire colors on this stator match your original stator. Hope this helps.

 

[ddzurik]

Re: 1993 force 120hp stator

PNWBOAT, Thanks for the response. my original stator is a 398-8778A24. I crossed it over to a cdi 174-8778k1 which I ordered
yesterday. I hope to have it on this weekend and I will post how the engine runs. I am kinda surprised how tight the spec is for the ohm readings for the windings. My top end was fine but when i slowed down to idle it would die. I had to jump on the throttle to take off with out stalling when I shifted it into gear.

 

[jerryjerry05]

Re: 1993 force 120hp stator

If your motor was running??/ You probably didn't need a stator???
Sounds like the fuel delivery is the problem.
Stalling when going into gear,usually the rpm's are too low?
Fill us in on what's going on?
ALL THE DETAILS???

The flywheel never goes bad unless the magnet/(0pole stator) breaks free.
The( 6pole) flywheel,the indivigual magnet can break free. Other than that they don't go bad.