Starter fuse question. (pic?)

[jhashey]

Im an idiot and blew my 90 amp starter fuse. After purchasing another I'd like to not blow it again! I have viewed the wiring diagram.

From my understanding the black wire gets bolted onto the post on the back of the fuse.

But since I didn't pull it out, I'm not 100% on where the positive wire goes. The other post on the solenoid ? (the post that the fuse is not on?).

Can anyone help or have a picture of it hooked up?

Thank you!

[pascavone]

this is the 80 amp fusible breaker.

this is bolted to your positive terminal on the starter, and the only thing that is wire to it, is your black engine harness wire.

This keeps your boat wiring from getting fried.

if you are blowing this, your have a short, or your running your boat on "BOTH" batteries, which you should never do, per your mercruiser manual.

So, tell us what kinda boat it is and the engine your have and we can figure it out....

[jhashey]

Thanks for the response!

Those are the style of fuse I have.

It is a v6 mercruiser. Someone took it out for me while I was doing other work and I have the new fuse, a thick positive wire and a black wire. I know where the fuse goes, but Im not sure where the two wires go.

- Joe

[jhashey]

It's an 1800 sr, 2005.

[pascavone]

the thick positive wire goes on the start positive post, then the 80 amp breaker goes on the same post, then put the nut on the post...---- then you connect the little black wire to the nut on the 80amp breaker......

this is a power limit breaker, so you don't burn your harness.

thats it.

[jhashey]

Here's what I did:

1. Put the positive cable on the starter post
2. Attached the negative to the back of the fuse with the lock nut.
3. Fastened the fuse to the same post as I put the positive wire on.
4. Re-installed battery

I did have power at the dash which I didn't before and I quickly cranked the engine to ensure power. I got out, put the earmuffs on, turned the water on, got back in, turned over the key and everything was dead again.

Any suggestions?

[jhashey]

Oh and it was a 90 amp Mallory fuse that I had purchased.

[pascavone]

No.. no negative on the fuse.


the fat positive to the starter, and the fat navigate to the starter.


the little black is actually the power for the engine harness, that why its behind the breaker.....

[jhashey]

Originally Posted by pascavone

No.. no negative on the fuse.


the fat positive to the starter, and the fat navigate to the starter.


the little black is actually the power for the engine harness, that why its behind the breaker.....

Ah that's what I did. Sorry for my confusion. I don't think the negative ever came off the starter. Red went on the post, black with a smaller eyelet went on the fuse.

Also thanks so much for helping!

[pascavone]

Ok,

put a new fuse back on top of the starter, and before you try to start it, REMOVE ALL THE LITTLE FUSES OUT FROM UNDER THE DASH, AND REMOVE EVERY EXTRA WIRE OFF THE BATTERIES. There are also fuses in little water proof holders around your battery switch.

(some items are direct wired to be batteries, like the carbonmonoxy detector, outdrive pump, and the bilge pumps.

Try starting the boat again, and insert fuses, one by one under the dash until you fine the circuit that will blow the fuse.

[jhashey]

Okay so I'm back in after getting another fuse in the mail..

Nothing electrical was done at the end of last season other than unhooking the battery and it was stored inside our attached garage.

Here's the set up.

Battery:



and the two black lines I had on the negative (close up above)

The rest on the postive:



Then I attached the black wire to the top post on the fuse:



Then put the positive wire on the post, the fuse, then tightened it down:





Anything look wrong before I try to hook the battery up and give it another go?

Thanks!!!

[mmwjr]

Can't make out where all the wires are from your picture. see attached diagram but it isn't really that clear either.

[ATTACH][/ATTACH]

[jhashey]

Thanks Mike. That is helpful, but I have a few more wires than the 1 black to the negative and 1 red to the positive and I think that's where my problem lies. Either that or the first aftermarket fuse wasn't up to par.

More than likely its 1 wire I'm screwing up somewhere though. Thanks!

Joe

[pascavone]

the red wire that looks pink coming off the positive post next to the large red battery cable is suppost to be connected to the nut on the 80amp fusible link.

Right now your providing RED power right up to the wire harness.

I can;t tell in the photo when the fusible link has wired to it.

[jhashey]

Thanks!

I'm not sure which one you mean by the pink wire (the battery picture or the starter picture?_

Right now on the fuse post I have a black wire which is easier to see here:



I appreciate it, really don't want to blow another one!

Joe

[mmwjr]

Joe,
from what I can tell in the last picture that is black heatshrink on the end and it looks like further back the wire is orange, which according to the diagram I provided goes to the alternator. My diagram shows that it should be on the fuse as you have it but to be sure I would use an ohm meter to verify this and that it is not a direct short to ground.

[mmwjr]

Here is a better picture.

[jhashey]

Mike,

Thank you for taking the time to find that! My wire going into the back of the fuse is black...In the diagram it says orange. I'm not even sure if I have an orange wire though?

Joe

[mmwjr]

Joe,
I would use an ohm meter to verify the black wire is not ground. Measure from the end of the wire to the negative on the battery if you get zero ohms than it is ground and should not be connected to the starter else you short the fuse to ground and it will blow. You may want to also measure to see if it has the same function as the orange wire by measuring ohms between it and the field terminal on the alternator shown on the first diagram I posted. If you get zero ohms from one end to the other than it should be the same as the orange connection to the starter.