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Forum: Taiwanese Makes 09-05-2021, 12:41 PM
Replies: 9
Views: 359
Posted By obthomas
I have every reason to believe my boat keel...

I have every reason to believe my boat keel access and pump arrangement are original. I have twin engines. In the middle of the engine room right over the keel between the center fuel tank and...
Forum: Taiwanese Makes 09-03-2021, 12:32 PM
Replies: 9
Views: 359
Posted By obthomas
I have a Labelle 40. It has a hollow keel. I...

I have a Labelle 40. It has a hollow keel. I have an automatic bilge pump to pump and keep the keel empty. I am not the first owner but I believe the arrangement is original. If my keel fills with...
Forum: General Maintenance 08-29-2021, 03:08 PM
Replies: 30
Views: 1,538
Posted By obthomas
Fire protection has been my field of expertise...

Fire protection has been my field of expertise for nearly 50 years. The coast guard requires an extinguisher that meets their requirements. This include the hangar that goes along with it and is...
Forum: Electrical and Electronics & Navigation 08-23-2021, 08:04 AM
Replies: 109
Views: 4,358
Posted By obthomas
Garmin all the way. Very intuitive and reliable....

Garmin all the way. Very intuitive and reliable. Goes with my Volvo Pentas.
Forum: General Discussion 07-03-2021, 10:16 AM
Replies: 8
Views: 298
Posted By obthomas
I have two engines because I need one. I go...

I have two engines because I need one. I go through the engine room for inspection before and after a voyage. I saw the circulating water pump pulley fall off one of my engines underway through the...
Forum: Electrical and Electronics & Navigation 05-09-2021, 09:35 AM
Replies: 20
Views: 1,490
Posted By obthomas
Take a lesson from a fused disconnect. When one...

Take a lesson from a fused disconnect. When one unit the disconnect shuts power to the fuses. You should arrange your separate disconnect and fuses the same.
Forum: Power Systems 05-09-2021, 09:29 AM
Replies: 14
Views: 697
Posted By obthomas
I have TAMD40B Volvo diesels and the thing I find...

I have TAMD40B Volvo diesels and the thing I find is they rarely need parts. In 10 years I have only had to rebuild the circulating pumps. I use GM alternators and keep zincs in my heat exchangers....
Forum: General Discussion 03-18-2021, 08:50 AM
Replies: 40
Views: 2,226
Posted By obthomas
NC is common diagram designation for "Normally...

NC is common diagram designation for "Normally Closed". My tanks supply engines from a dip tube about 2 inches from the bottom of the tank. The other connection is the tank drain. Switching from...
Forum: General Discussion 03-17-2021, 12:52 PM
Replies: 40
Views: 2,226
Posted By obthomas
Thought I would show you all my system:

Thought I would show you all my system:
Forum: Electrical and Electronics & Navigation 03-15-2021, 10:38 AM
Replies: 9
Views: 447
Posted By obthomas
They are in all the chandleries. Look for...

They are in all the chandleries. Look for Carling switch.
Forum: Californian 03-04-2021, 09:31 AM
Replies: 10
Views: 948
Posted By obthomas
It is a battery combiner.

It is a battery combiner.
Forum: Other Trawler Systems 02-26-2021, 08:50 AM
Replies: 27
Views: 2,124
Posted By obthomas
Dashash Until you get your electrical...

Dashash Until you get your electrical information pinned down the advice you are getting here so far is well intended but is all over the place. Its kind of like "I saw the man with binoculars" ...
Forum: Electrical and Electronics & Navigation 02-16-2021, 11:06 AM
Replies: 21
Views: 1,877
Posted By obthomas
You can get a new class B transceiver with NMEA...

You can get a new class B transceiver with NMEA 2000 for the same money or less. The only advantage to class A is it tries harder to interact with others in a high radio traffic situation. My...
Forum: General Discussion 02-04-2021, 12:23 PM
Replies: 67
Views: 6,900
Posted By obthomas
In my opinion a boubous bow has a primary purpose...

In my opinion a boubous bow has a primary purpose of extending the wetted perimeter around a boat. This then alters the hull speed calculation. More wetted perimeter more hull speed. While there...
Forum: Power Systems 01-24-2021, 05:27 PM
Replies: 9
Views: 216
Posted By obthomas
Right or wrong I run 15W40 Rotella in my...

Right or wrong I run 15W40 Rotella in my TAMD40Bs. I do not go synthetic because I do not put enough hours on the engines between yearly oil changes to make it economical.
Forum: Power Systems 01-21-2021, 10:39 AM
Replies: 45
Views: 2,626
Posted By obthomas
Take some advice from diesel fire pump engines. ...

Take some advice from diesel fire pump engines. John deer is often used by Clarke as a fire pump engine.

The fire pump code specifically requires the fuel supply to be above the engine lift pump....
Forum: General Discussion 01-13-2021, 09:04 AM
Replies: 394
Views: 13,952
Posted By obthomas
I have been on TF for some time and avoided this...

I have been on TF for some time and avoided this thread because I knew that the definition of a trawler got its beginning in Apocrypha. My curiosity got the best of me as to why this thread has been...
Forum: Power Systems 01-13-2021, 08:50 AM
Replies: 4
Views: 532
Posted By obthomas
I have the same vintage boat you are looking at. ...

I have the same vintage boat you are looking at. The iron tanks in this boat may start leaking at any time. Just know this and have a plan for the possibility. There are several replacement...
Forum: Power Systems 01-11-2021, 11:49 AM
Replies: 48
Views: 2,885
Posted By obthomas
I like Northern Lights or Westerbeke. 1800 rpm...

I like Northern Lights or Westerbeke. 1800 rpm and sound enclosures are a must. Generator size is easy; same size as shore power. Most 40 footers about 60 amps or 8KW.
Forum: General Discussion 01-11-2021, 09:35 AM
Replies: 16
Views: 439
Posted By obthomas
Careful with interpretations. Neither the Coast...

Careful with interpretations. Neither the Coast Guard or ABYC require automatic engine room fire extinguishing systems or engine shut down in uninspected Diesel Trawlers under 65 feet. I believe...
Forum: General Discussion 12-26-2020, 11:03 AM
Replies: 209
Views: 7,807
Posted By obthomas
Yachting is expensive. I'm not exactly poor, but...

Yachting is expensive. I'm not exactly poor, but I feel like I could not be in Yachting if I did not do much of my own maintenance. I have set aside this week for oil changes and engine zincs. ...
Forum: Marlow - Mainship 12-22-2020, 10:56 AM
Replies: 320
Views: 7,864
Posted By obthomas
I'm all electric and I have a $10,000 generator...

I'm all electric and I have a $10,000 generator in a sound enclosure. Why would I ever consider solar and batteries and inverters or propane and all the extra crap that goes with them. Generator...
Forum: General Maintenance 12-10-2020, 01:17 PM
Replies: 33
Views: 1,241
Posted By obthomas
There are several ways to approach this problem...

There are several ways to approach this problem and all outcomes need balancing. A 36 foot trawler in Florida needs about 2.5 tons of AC in the summer an maybe 3 KW of heat in the winter
First...
Forum: Electrical and Electronics & Navigation 11-29-2020, 09:55 AM
Replies: 73
Views: 3,789
Posted By obthomas
Some things just have more risk than others. ...

Some things just have more risk than others. Gasoline boats blow up more often than diesel boats.

You are standing in your engine room up to you ass in spilled gasoline and are holding three...
Forum: Power Systems 11-23-2020, 07:44 AM
Replies: 28
Views: 2,278
Posted By obthomas
Pictures?

Pictures?
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