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Search: Posts Made By: DotDun
Forum: Engines and Propulsion Systems Yesterday, 16:56
Replies: 9
Views: 684
Posted By DotDun
Re: Yanmar 3YM30 Raw Water pump seized

Wow, 12,000 hours is a lot! :biggrin:
Forum: Engines and Propulsion Systems Yesterday, 14:01
Replies: 9
Views: 684
Posted By DotDun
Re: Yanmar 3YM30 Raw Water pump seized

How many hours on it?

The lip seal (not oil seal) is $5, easy to change.
Forum: Fountaine Pajot Yesterday, 09:54
Replies: 367
Mahe 36: Rig and Sails
Views: 79,093
Posted By DotDun
Re: Rig and Sails...mainsail batten hardware

Try Bainbridge (I would guess Mack would get the parts from Bainbridge).
Forum: Electrical: Batteries, Generators & Solar 16-11-2017, 18:15
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

Not trying to muddy the waters. You made the statement that all transformers provide isolation, you didn't qualify to only transformers used in inverters. Since auto transformers are a viable...
Forum: Engines and Propulsion Systems 16-11-2017, 14:32
Replies: 9
Views: 684
Posted By DotDun
Re: Yanmar 3YM30 Raw Water pump seized

take the hose of the pump and raise it above the waterline (or open the strainer)
Forum: Electrical: Batteries, Generators & Solar 16-11-2017, 11:56
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

Corrections/Clarifications:



Not true. Auto transformers are metallic coupled, hence no isolation provided. If the primary side of an auto transformer is grounded, then so is the secondary...
Forum: Electrical: Batteries, Generators & Solar 16-11-2017, 10:29
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

Ron's question was why is the power system grounded, not about the grounding conductor.

That's the way I read it.
Forum: Electrical: Batteries, Generators & Solar 16-11-2017, 09:24
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

Due to transmission line issues.

According to the NEC, the purpose of connecting an electrical system to the physical ground (earth) is to limit the voltage imposed by lightning events and contact...
Forum: Electrical: Batteries, Generators & Solar 16-11-2017, 07:02
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

You must understand the architecture of a GFCI/RCD in order to realize how it works.

An on-board test function on a GFCI receptacle that requires the grounding conductor in order for the test...
Forum: Electrical: Batteries, Generators & Solar 16-11-2017, 06:08
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

The safety feature of the device is not sacrificed when the grounding conductor is not connected.

The point is that when used in an ungrounded power system, a GFCI protects against faults the same...
Forum: Fountaine Pajot 15-11-2017, 18:03
Replies: 9
Orana 44: Mast Shortening
Views: 387
Posted By DotDun
Re: Mast Shortening

And shorten the head sail? Don't think so.

I doubt the masthead is welded to the mast.
Forum: Deck hardware: Rigging, Sails & Hoisting 15-11-2017, 18:01
Replies: 65
Views: 3,019
Posted By DotDun
Re: Hurricane wind effect on rigging on the hard

The boat has a lot more windage than the rigging. The bare poles wasn't pushing that boat.
Forum: Electrical: Batteries, Generators & Solar 15-11-2017, 17:40
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

What you are describing is a failure mode of a grounded source. With an un-grounded source, you can touch either side without danger. In the OP's case, he can put one side of the AC from his...
Forum: Electrical: Batteries, Generators & Solar 15-11-2017, 16:12
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

Do explain what accident you are imaging can happen.
Forum: Electrical: Batteries, Generators & Solar 15-11-2017, 15:35
Replies: 69
Views: 2,102
Posted By DotDun
Re: Grounding an inverter

Do explain how the OP is in danger of being electrocuted.

The problem is you can't. Without a grounded source, the grounding conductor is useless. A floating source is not dangerous.
Forum: General Sailing Forum 14-09-2017, 11:38
Replies: 13
Views: 1,877
Posted By DotDun
Re: Irma - Burnt Store Marina Update

Sorry, my bad. I mis-interpreted your previous posts:








Can't help with your general dislike of Government, etc.
Forum: General Sailing Forum 14-09-2017, 06:14
Replies: 13
Views: 1,877
Posted By DotDun
Re: Irma - Burnt Store Marina Update

You obviously have some beef with FPL, I can't comment, have never been a customer. Also, I'm not expecting the gov't to support me with a bed and food during a hurricane.
Forum: Weather | Gear, Reports and Resources 13-09-2017, 17:54
Replies: 26
Views: 1,558
Posted By DotDun
Re: NOAA Hurricane Forecasts

The west coast of FL was never out of the cone 48-120 hours before landfall!
Forum: General Sailing Forum 13-09-2017, 06:04
Replies: 13
Views: 1,877
Posted By DotDun
Re: Irma - Burnt Store Marina Update

FYI, Marco Island is not part of the Keys!

If you don't think Marco got hit with a real hurricane, bring 5 gal. of gas and some cold beer, I'll show you!

:rolleyes:
Forum: Propellers & Drive Systems 26-08-2017, 15:59
Replies: 11
Views: 1,013
Posted By DotDun
Re: SD 20 Saildrives

2600 hours, just replaced the propellers shafts as the lip seals wore them down and it was hard to keep the water out.

SD20's have a dog clutch, not the cone clutch that the SD50's have. IMO, the...
Forum: Marine Electronics 25-08-2017, 20:02
Replies: 5
Views: 507
Posted By DotDun
Re: NMEA2000 engine monitoring additions

Two units I know of, no experience with either.

EMU-1 - Actisense (http://www.actisense.com/product/emu-1/)
...
Forum: Atlantic & the Caribbean 25-08-2017, 17:48
Replies: 68
Views: 6,429
Posted By DotDun
Re: not so friendly lobsterman in Maine

There is a reason you cannot, as it's not true. It flies in the face of the 2nd amendment.
Forum: Rules of the Road, Regulations & Red Tape 23-08-2017, 18:37
Replies: 330
Views: 14,333
Posted By DotDun
Re: Thread for Basic COLREGS Questions

That would be a whole lot easier if everyone would use common definitions instead of making up their own and never disclosing such.

Please tell us what you mean by "Class A target" and "Class B...
Forum: Rules of the Road, Regulations & Red Tape 23-08-2017, 14:25
Replies: 330
Views: 14,333
Posted By DotDun
Re: Thread for Basic COLREGS Questions

The substantive difference is one of:

a) Getting hit by a 50 ton commercial vessel carrying a Class B AIS transponder will do more than "scratch your fiberglass" as you propose.

b) A sub 50'...
Forum: Rules of the Road, Regulations & Red Tape 23-08-2017, 07:11
Replies: 330
Views: 14,333
Posted By DotDun
Re: Thread for Basic COLREGS Questions

I don't think there is any substantive difference--but then again--I was the defendant. Can anyone show me that there is a substantive difference?[/QUOTE]

IMO, you use the term 'class B targets'...
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