Part Number/Supercession Verification

[Stamey]

A friend had her 2001 Merc 90, ELPT, 4-stroke's voltage regulator catch fire. Fortunately for her the engine cover snuffed it out, but not before melting a bunch of stuff in there. Apparently the is a common thing for Mercs and Yamahas. I had no idea.

I am hunting down the parts needed for the repairs but am having difficulty with a few parts, the shift interrupter harness, the CDI module, and another harness that goes through the bottom cowl and to some kind of sensor suspended in a bracket just below the cowl.

The shift interrupter harness has a PN, 84-876178A 1 on it. I have been looking for this in the diagrams on the Merc site and do not see it anywhere. Searching for that PN through Google has also gone nowhere. I tried finding it through the parts manual and cannot find it described so I can get the correct PN for it.

The CDI module seems to be the early one, according to the SN, but on some sites it says that the early part number has been superseded by the late part number. I would imagine that the early and late part numbers are different for a reason, and I wonder why the early number would be superseded by the late one, when there is a split in the SN on the merc parts site.
Early part number, and on the merc parts site says it should be, according to my SN: 804269T 1
Later PN: 804269T 2

As far as the other sensor goes, I'm not even sure what it is, therefore I can't look it up. I'm thinking maybe it's a trim sensor, but I am not sure. I just know the wiring goes through the bottom cowl with the trim wires and it goes to a unit mounted directly under the cowl. This is another part I did not see any pics of in the parts diagrams on the merc site.

Also, are just the connectors for the CDI module available in any way? The bottom connector for the CDI module is melted. It's still usable, but I would replace it if I could find one. Since it will still seal and lock to the module, I couldn't justify the cost of an entire new harness for that section.

MERCURY - ( 90 H.P. (2001 ))
Serial No: 0T318029 Model No: 1F90412YD

Any help sorting this out will be appreciated.

Thanks,
Chris

 

[Fun Times]

Re: Part Number/Supercession Verification

Try looking up Electrical+Components,
http://www.mercruiserparts.com/Show...inbr=4858&bnbr=30&bdesc=Electrical+Components

And under Ignition Components,

http://www.mercruiserparts.com/Show...g&inbr=4858&bnbr=50&bdesc=Ignition+Components

Your complete parts catalog,

http://www.mercruiserparts.com/selectDocs.asp?doc_nbr=804851+00

Also, can you post some photos of what your looking for?

 

[Stamey]

Re: Part Number/Supercession Verification

I am trying to get some pics. I didn't think to takes those pics at that time, and it's quite a ways from me, in my friend's yard.
The diagrams you posted look the same as what I have been looking at, I was just at the other site, the https://webapps.brunswick.com/literature/literaturePartsInfo.do. I will look these over to see if the diagrams have any additional info in them.

Thanks,
Chris

 

[Stamey]

Re: Part Number/Supercession Verification

Oh yeah, should I get the parts from Mercruiser directly, or someplace else, that maybe has better pricing? I tried to find a couple of the parts through iBoats but was unable to find them on here.

Thanks,
Chris

 

[Fun Times]

Re: Part Number/Supercession Verification

I'm pretty sure that the parts you need will only be available through a "mercury dealer" of your choice and sometimes found on ebay if you type in the part number.

The name of the company that makes the wire harnesses "for Mercury" escapes me as I haven't heard the name used in years now. If you had that name then that might be an alternative route for better pricing.

The link I posted is slightly better because they keep up with the superseded part number vs the brunswick.com link. The brunswick.com is good to find your engine info along with your "original" part number only, it does not show the superseded part number like in my link.

So IMO, the best thing to do is confirm your parts catalog part number at the Brunswick site, then go to the home page of my link or a few others out there online that's a "Merc dealer", find the Miscellaneous Information or Service/Support Material and confirm the parts catalog part number for your engine model match.

If you want to go aftermarket at places like iboats, then the best thing you can do is find your new and old Merc part numbers and input the number here at iboats to confirm the OEM #'s will match the aftermarket number listings. I say that because I have recently seen and pointed out some mistakes.

One other easy idea would be to google your Model No: 1F90412YD and see what you find.

 

[Stamey]

Re: Part Number/Supercession Verification

Thanks a lot for the help. The really nice thing about the site you posted is that you can see pics of the individual parts, in many cases. This proved to be the case with the trim sender, which after my I talked my friend through getting a pic of and sending it to me, I matched it to a pic of the part on the site. Huge help. As far as the shift interrupter harness, the pic she sent of the label told me that I had gotten one digit read wrong, an 8 instead of a 6, for 878178A1, which I have now found.
And it's not that I am trying to get aftermarket parts, so much as a better price on the merc parts, if that is possible. I am fine with aftermarket if anyone has found a better design for the regulator. I mean, for that kind of money, it should have a design that cannot catch fire and have a lifetime warranty on it.

I have read where Yamaha makes these engines and if you can get the Yamaha version of the regulator its a little over 100 bucks. Wish I had a cross reference for that.

Thanks again for the help.

Chris