|
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
|
Forums28
Topics3,983
Posts19,061
Members1,018
|
Most Online238 Feb 9th, 2024
|
|
|
2GM Motor Fuse
#8456
11/24/09 10:25 PM
11/24/09 10:25 PM
|
Joined: May 2007
Posts: 1,234 Newport and Naples
Cap'n Vic
OP
Senior Member
|
OP
Senior Member
Joined: May 2007
Posts: 1,234
Newport and Naples
|
This summer Bill of Rhapsody and I had a discussion going about the Master Fuse for the fuse panel and the "Motor Fuse" that shows up on the wiring diagram for the Yanmar. Today I was doing some of my once every 25 year maintenance and looked for the Motor Fuse. On the 500 series boats it is located directly behind and under the air cleaner, in a GREEN fuse holder, black taped to the wiring harness, red leads spray painted mostly motor gray. Hopefully they didn't tape it more than they have on Vee Jay. [You have to take the air cleaner off to access it] So if some day you turn the ignition on, and the oil alarm doesn't sound, and the motor doesn't turn, but your radio still works ... it may be just possible that this fuse popped or the fuse holder cracked. I thought it looked good enough not to have to do a close inspection and take it apart at this 25 year check up ... will look at it again in 10 years.
Last edited by Cap'n Vic; 11/24/09 11:21 PM.
|
|
|
The J/30 Class Association has partnered with West Marine and is now a member of the West Marine affiliate program. You can support the J/30 Class when you make your West Marine purchases online. The J/30 Class Association receives a percentage of sales from your purchases when you click through from our website. Click the logo above and you will be directed to the West Marine website with a cookie that identifies you as a J/30 affiliate. You can also use any discounts that you may be authorized.
|
|
2GM Motor Fuse, and another one too....
[Re: Cap'n Vic]
#8461
11/25/09 12:11 PM
11/25/09 12:11 PM
|
Joined: May 2007
Posts: 2,668 Portsmouth, RI
Rhapsody #348
Past J/30 Class President
|
Past J/30 Class President
Joined: May 2007
Posts: 2,668
Portsmouth, RI
|
A different scenario on Rhapsody. There is a 30 amp inline fuse going to the DC power panel that was installed directly behind the battery disconnect switch. This is in addition to the fuse Vic describes which is shown on last page of the Yanmar Operation Manual. The fuse for the Yanmar is only for the starting solenoid, idiot lights and alarm. DC power for the starter is connected directly from the battery switch with the heavy gauge battery cable. I was delivering the boat to be hauled for the season a couple years back and found that nothing worked electrically, except for the engine panel. It turns out that the hidden fuse socket behind the battery disconnect switch that feeds the DC power panel had corroded terminals causing a high resistance connection. The high resistance connection heated up and melted the insulation on the wire by the fuse socket. So I recommend that people check to see if you have an inline fuse similar to what Rhapsody has. I've replaced it with a spray tight inline socket, and sprayed WD40 on the terminals before installing the fuse. Moral of the story - look to see if you have a hidden fuse like this before it causes a problem. By the way - I uploaded all the Yanmar reference material to the J/30 Class website. Go to the J/30 home page, then from the top menu mouse over "Info", "Articles of Interest", and click on "Diesel Engine Maintenance"
|
|
|
Re: 2GM Motor Fuse, and another one too....
[Re: whitedolphin]
#8466
11/25/09 01:38 PM
11/25/09 01:38 PM
|
Joined: May 2007
Posts: 2,668 Portsmouth, RI
Rhapsody #348
Past J/30 Class President
|
Past J/30 Class President
Joined: May 2007
Posts: 2,668
Portsmouth, RI
|
Dan - some follow up questions.. - Have you had the problem since replacing the fuse and socket? If not, problem solved.
- Do you know the draw on the Halogen lamps? I think they are 20 Watts which equates to 1.7 amps each. If so, there are 8 lights in the cabin on Rhapsody, so that's 13.6 amps just for lighting.
- What kind of pump/motor is it, and is there a label listing current drain? I suspect it has a high current draw since the lights flicker, or you have a high resistance connection in the supply or return circuit between the DC power panel and the battery. (e.g. bad contacts on the switch, corroded terminals, poor fuse connections, wire has degraded over time in marine environment)
- Rhapsody has manual pumps in the water system, so no electrical issues.
I know my Nav lights eat up battery. When delivering Rhapsody back from Westport, I ran the nav lights for 4 hours on one battery, then had to put the battery switch on "All" to start the Yanmar and charge the battery.
|
|
|
Re: 2GM Motor Fuse, and another one too....
[Re: whitedolphin]
#8469
11/25/09 05:27 PM
11/25/09 05:27 PM
|
Joined: May 2007
Posts: 1,234 Newport and Naples
Cap'n Vic
OP
Senior Member
|
OP
Senior Member
Joined: May 2007
Posts: 1,234
Newport and Naples
|
When Bill told me last summer that little fuse holder hanging off the battery switch was the master fuse for the fuse panel it astounded me. It was basically a 20 amp fuse holder with what looked like a #14 wire that came off the battery switch and then was connected to a #10 wire to run to the fuse panel.
Over the years I had worked around it running separate leads for my ham radio equipment directly off the battery.
Last year I added a second #10 red and black line to the fuse panel from a third battery that i keep in the plastic settee bin aft of the fuel tank. the red goes to the load side of one of the auxiliary switch and fuse holders on the main fuse panel and through that fuse and on/off switch to the main + buss at the fuse panel. The black just goes to the main black buss screwed on the hull. This way I can switch the spare battery in when I need it. For sailing/racing/overnights we turn the main battery switch to off and click on the third battery for lights, GPS and radio ... and run it to useless. Then switch it off and put one of the main batteries on.
I used to use a #27 battery and that would last most of the night, but that is too heavy for me now. The smaller #24 battery is no where near as good.
This year I changed the original fuse holder at the battery switch to an ATC 30 amp blade holder as I was having low voltage warnings at the GPS. That didn't help ... so I ran another set of Red and Black directly from engine to the master fuse panel...I now have three sets of #10 wires feeding the master fuse panel. I am still experimenting to get the voltage at the GPS stronger for a longer time. But three batteries is nice if you want to gobble up amps.
The line from the engine as well as the one from the battery switch have 15 amp ATC fuses which I think will both blow if I get up over 30 amps. When you start to add up amps for gps, instruments, auto helm, radio and a few lights, bilge pump, fresh water pump, CD player you can start to chew up amp hours. and as I remember these Dual Purpose batteries have just about 120 hours ... but the voltage drops continually during that time.
Surprisingly we can charge the spare battery by leaving it on when the motor is running and have not yet blown out a fuse. And if the starting battery is a little weak clicking on the fully charged spare battery easily helps start the motor.
The line from the spare battery has a 20 amp glass fuse it goes through at the master panel.
All that said there are different water pressure pumps available and you are better off with the smallest one available, which I think is a 1.9 gal flow.
|
|
|
Re: 2GM Motor Fuse, and another one too....
[Re: Cap'n Vic]
#8495
11/30/09 07:14 PM
11/30/09 07:14 PM
|
Joined: Apr 2003
Posts: 649 Marblehead, MA
dbows
Senior Member
|
Senior Member
Joined: Apr 2003
Posts: 649
Marblehead, MA
|
I found out this fuse existed on an overnight to Booth Bay Maine about 2am all electric shut off. It was blowing 20+ and we were screaming at about 10+ downwind wing on wing having a blast, until then. I could not for the life of me find what the issue was but I figured it must be a ground or something since everything went out at once. We could also still start the motor so I was not to worried, just curious what the issue was. It turned out to be the fuse holder came a part. I looked at it 10 times that night but thought it was to the flexible solar panel that the boat came with so I did not put it back together. I just never thought a 5A (yes mine was a small fuse) fuse would be in-line with the whole fuse panel.
Luckly I carry a battery gps and handheld VHF so we were safe accept for the running lights but I also have a battery powered spot light that we hit the sails with if we saw a fishing boat.
I replaced with a 30A blade type of fuse, but still wondered why the fuse panel was fused??? Sounds like no-one is quite sure.
David Bows Mallorca - Hull# 397 ~~~~~_/)~_/)~~~~_/)~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~
|
|
|
|
0 registered members (),
48
guests, and 13
spiders. |
Key:
Admin,
Global Mod,
Mod
|
|
|