Shift interrupt switch

[smithrock]

Re: Shift interrupt switch

Look at page 1C-44 the pictures show how the switch mounts and the wires go on the little terminal block in your photos. Especially picture #50499

You also need manual #7 for your engine. It includes all the wiring diagrams.

Are those pages in manual 7 ? If so, could you send me the link?

Thanks.

Okay, I saw the pics in #50499 I can do that, all I need to know is: can I hook up "B" wires straight to the coil? and "A" wire to ground--where?

 

[Don S]

Re: Shift interrupt switch

No, the pictures are in manual #6, the wiring diagrams are in #7 and it's not online.

 

[smithrock]

Re: Shift interrupt switch

No, the pictures are in manual #6, the wiring diagrams are in #7 and it's not online.

This is what I was referring to: http://www.boatfix.com/merc/Servmanl/6/6C1R3.PDF

After I connect to the terminal block, do i then connect B to the coil or where? And A to ground exactly where?

Thank you for all your help--I am learning--I just don't want to screw something up!

 

[Don S]

Re: Shift interrupt switch

Do you have points type ignition, or the Thunderbolt IV sytem?

 

[smithrock]

Re: Shift interrupt switch

No points, I'm thinking I've got the Thunderbolt IV.

 

[smithrock]

Re: Shift interrupt switch

The motor was rebuilt around 4 years ago--so I was told.

 

[Don S]

Re: Shift interrupt switch

See if this will help.

 

[smithrock]

Re: Shift interrupt switch

See if this will help.

Thanks, Don. Got home late tonight, I'll check my distributor tomorrow hopefully mine has those places to connect the wires to. What gauge wire do I need to use?

 

[Bondo]

Re: Shift interrupt switch

What gauge wire do I need to use?

14ga. will work Just Fine........

 

[burroak]

Re: Shift interrupt switch

See if this will help.

http://i123.photobucket.com/albums/o291/DonSind/Me
rcPre89wiringdiag.png

Dang Don,

Way to go!

I was reading this thread like a suspense novel. I just knew someone was going to come through with a diagram.

How did you get the diagram down to the iboats size limit?

 

[Don S]

Re: Shift interrupt switch

How did you get the diagram down to the iboats size limit?

I don't use iboats to upload files. In this case I used photobucket.com and just posted the image.
Eventually when I get my own web space set up I won't even have to use photobucket, but I can't seem to get mine to work yet, and really don't have the time to mess with it yet.

 

[smithrock]

Re: Shift interrupt switch

Don,

I have 2 wires that come off the dist. a red and a black both go to the coil, can I connect the one (or both) at the coil, will that work?

 

[Don S]

Re: Shift interrupt switch

Don't have a clue what you have. Never seen one with red and black wires.
Got any pictures? Who knows, you may not even have a Merc ignition system.

 

[smithrock]

Re: Shift interrupt switch

Don't have a clue what you have. Never seen one with red and black wires.
Got any pictures? Who knows, you may not even have a Merc ignition system.

I'll try and post pics, my guess is they used whatever color wires they had available when it was rebuilt.

 

[Don S]

Re: Shift interrupt switch

my guess is they used whatever color wires they had available when it was rebuilt.

That's when it's time to either trace each wire out, tag it and know what it goes to, get a new harness, or make your own. It's up to you, I can't see it or guess what goes to what when it has been owner modified.

 

[smithrock]

Re: Shift interrupt switch

Don,

Here are some pics. of the red and black wires that go from the cap to the coil. [the black wire is hard to see, but it does go from the cap to the coil.]
Would it be possible to wire it to the coil?

http://i173.photobucket.com/albums/w65/shelbyrae22/wires001.jpg

http://i173.photobucket.com/albums/w65/shelbyrae22/wires003.jpg

 

[Don S]

Re: Shift interrupt switch

Yep, just as I thought, you don't have a Thunderbolt ignition. Some previous owner changed it to the Prestolite BID distributor. Was never used by Merc.
The red wire goes to the + and the black goes to the -.
Not sure how to wire it to a shift interrupt switch. Let me do some searching.

Just to make sure, could you take a picture of the inside of the distributor. Just pull the cap and take a pic. Doesn't have to be super close, would rather see the whole distributor and coil in it.

 

[smithrock]

Re: Shift interrupt switch

Yep, just as I thought, you don't have a Thunderbolt ignition. Some previous owner changed it to the Prestolite BID distributor. Was never used by Merc.
The red wire goes to the + and the black goes to the -.
Not sure how to wire it to a shift interrupt switch. Let me do some searching.

Thank you Don, I would very much appreciate if you are able to figure this out for me, as I would really like to have my switch hooked up.

I did purchase a Quicksilver rotor and cap kit (Thunderbolt) # 815407Q 5
will this NOT work on my unit? If not, can you tell me what I need as I want to replace the cap and rotor.

 

[xltier]

Re: Shift interrupt switch

those wires look very much like a pertronix kit i took out of a 5.7 the other day.

 

[smithrock]

Re: Shift interrupt switch

Yep, just as I thought, you don't have a Thunderbolt ignition. Some previous owner changed it to the Prestolite BID distributor. Was never used by Merc.
The red wire goes to the + and the black goes to the -.
Not sure how to wire it to a shift interrupt switch. Let me do some searching.

Just to make sure, could you take a picture of the inside of the distributor. Just pull the cap and take a pic. Doesn't have to be super close, would rather see the whole distributor and coil in it.

I should be able to take the pic tomorrow (hopefully)

thanks!