Part number problem

[5150abf]

Back story: Replaced 27 year old thermostat on my '81 'Rude 50 now my overheat alarm comes on intermitetly, I know there are no obtructions and the pump is new and it pees a straight stream, alarm turns off after 1-2 minutes.
While the alarm is going off you can hold your hand on the head for 5-10 seconds, it is really warm but not hot so I think the temp switch is bad.

Looked on the Evinrude site, shows part #386686 but all the parts I can find with that number have 2 leads, yellow and a ground, mine has one, yellow.
I found one that looks right but the part number is 584592, is this a superseded number or not the right part.

DO I order the right part number and just ground the extra lead or get the one that looks like the right part?

 

[ezeke]

Re: Part number problem

386686 is still the correct part number. It has one tan wire like all the regular temperature switches and has not been superseded. It shows as number 78 on the 1981 50HP cylinder and crankcase diagram: http://shop.evinrude.com/

 

[5150abf]

Re: Part number problem

This is the part I am finding under that number, note 2 leads not one
http://www.powerheadkit.com/images/DSCN0803.JPG
Wil this one work, just ground the ground wire?

 

[ezeke]

Re: Part number problem

Ask powerheadkit.com if their's is the picture of the OMC/BRP part. They also show this one. Usually a new number is assigned to a part when a modification is made, so this would be unusual.

 

[5150abf]

Re: Part number problem

Not getting it there, it was just a good pic, this one is the right part number but too many wires but will it work if I hook the ground to a head bolt?

http://cgi.ebay.com/ebaymotors/NEW-...022QQitemZ350028586739QQrdZ1QQsspagenameZWD1V

 

[ezeke]

Re: Part number problem

Black is a ground in OMC wiring, so that would seem all right to me. My older switches had more exposed metal on the sides where the rubber cover is on that one. I suppose the added ground is to make up for that.

 

[CBINMN]

Re: Part number problem

I had the same concern with the 2 wires a while back and in fact the black is ground. Just bolt it to head cover bolt nearby. Mine works great.

Chris

 

[5150abf]

Re: Part number problem

Thanks guys, I feel better now that I know someone actually has done it, just seemed kinda weird.