Questions about the nature of fuses

[roadnsky]

Good, I'm not completely alone then.

Hey wait a minute, aren't you a PCV disciple? Oh well, I guess nobody's perfect OK, here's a shot at redemption: your regulator, fixed point or adjustable?

Oh, old school here... fixed.
All batteries on their 5th year running strong.
Which in this heat is saying something!

Oh, and BTW, I bought that PCV when I first got the boat and was trying to overcome some issues caused by my PO.
It was the 2nd purchase I made for the A4.
Now that I know more about my beast, I'm not sure I needed it or would install it now. But there it is...

[ndutton]

Alrighty then. Headed out to dinner, I'll have a margarita in honor of your absolution my son.

[roadnsky]

Alrighty then. Headed out to dinner, I'll have a margarita in honor of your absolution my son.

Hamenna! Hamenna! ...and cheers!
I'm going for a sunset sail

[msmith10]

A while back Don posted a listing of engine-related fuses and proper sizing. I found the link.

http://www.moyermarine.com/forums/attachment.php?attachmentid=140&d=1157733333

After Don published this I made sure these items were fused in accordance with those recommendations.

[Al Schober]

Fuse Story

I've got an old story about a blown fuse.
I was working as a mechanic/grease monkey at a chevy dealer when a new chevy came in with a problem - whenever the owner stepped on the brake pedal, the brake fuse blew. I popped the trunk and found an entire new wiring harness for the trunk - still had the stickers on it. Unplugged that harness, and the fuse still blew. Hmmm. Wire harness ran along the top of the hump - looked from the back end & saw nothing amiss. Peeled back some carpeting between the seats, found the harness and an errant sheet metal screw - down through the harness into the hump. Pulled the screw and all was well. Never did meet the idiot that replaced the harness in the trunk..

[RobH2]

Rob (et al)
If there's a drawing of mine you find useful and need a bigger version you need only ask. I have them all in CAD but ....

Thanks. I'm good for now. I cross-referenced a bunch of others and have it figured out. Glad to know they are available.

Thanks again.

[RobH2]

Spent the day going over my wiring. What a mess. Mind you, I've only had this boat 2 years and I've been repairing items as they broke. Until now, I've had no wiring issues.

Let me tell you though, it's crazy. I'm going to have to pull all of the wiring and rewire the entire power plant and gauges. I'll wait till it's cooler but there is no use trying to fix one thing at a time.

I've put a new fuse in and clamped an amp meter around the wire to the switch. It was drawing 1.2 amps. Whatever popped the fuse is not misbehaving right now but mind you, the next time I have guests out it will raise its ugly head. That I know.

I'm going start ordering colored wire and do it right this fall. I wanted to drop my rig and rewire the mast anyway because I don't have a mast head light and the steaming light is missing. A new rewire of the boat will be a lot of work but in the end I'll know it will be right.

Thats for the help. I'll keep you posted.

[ndutton]

Let me tell you though, it's crazy. I'm going to have to pull all of the wiring and rewire the entire power plant and gauges. I'll wait till it's cooler but there is no use trying to fix one thing at a time.

We just did this on Ezra's (systemek) Cal 29 about a month ago. Rather than listen to me, I'll invite Ezra to chime in and offer his thoughts from a different, initially more intimidated point of view. It took a little more than half a day not counting a trip to the chandlers and a very nice lunch and I believe Ezra will report it wasn't that big of a project.

[RobH2]

Good to hear. I was looking yesterday and there are just cable-tie bundles of wire everywhere. It seems as if everything is led back to the breaker panel and nothing feeds off of any common bus. I found some more speaker wire and immediately cut it. The insulation falls off of that stuff and invites a catastrophic short and fire. Nothing went out that I could see so maybe it was just left over from a rewire. I couldn't find the end as it dove under the cockpit.

Anyway, it will be comforting to have new wiring.

[67c&ccorv]

Rob-
Yes a 20A is correct for the ignition.
But I think you want to trace that wire to be certain of where it starts as well as where it terminates.

Here's the MMI drawing to give you a start.
There are other drawings and threads on the site too.
Do a search for DC Wiring.

There are also some nice drawings and discussion on this thread...
http://www.moyermarine.com/forums/sh...ghlight=Wiring

As long as the wire it is plumbed into is #12AWG?

[roadnsky]

As long as the wire it is plumbed into is #12AWG?

Well, yeah. Good point.
Another reason I attached the MMI drawing and asked where the wire was originating.

[roadnsky]

Thought I'd post this link to one of Don's older threads about fusing.
Seems like a good way to put a finish on this thread?

http://www.moyermarine.com/forums/showthread.php?t=1044