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  Topic Review (Newest First)
3 Hours Ago 01:10 PM
Capt Len
Re: 1989 Hunter 40 - A million questions.

Barque 'Washer starts out soft,Work hardens . Like new wire, bending breaks up big soft 'Crystals' of metal ,more smaller 'cells' of soft left,more boundaries to fracture. gets hard,leaks or fails. Bring copper to annealing temp and atoms regroup and form large crystalline structure (soft,malleable) Ferrous metals workharden and fracture too .Bring to red hot and cooling slow anneals. Cooling quick traps the carbon and other additives in the matrix and make brittle ,hard .reheating a bit and quenching allows control of how much (Think knife, spring , file ) Same with aluminium .Extruded is usually a copper alloy Heating to where the carbon soot from the smoky torch burns off allows the copper atoms to redesolve into the Al. Take care as it melts with only a bit more heat Got maybe few hours of malleability before the copper re forms little alloy crystals and softness is gone (think aircraft rivets ,,annealed ,kept refrigerated until used.) No numbers offered here, just a mental exercise what;s what at an atomic level.
3 Hours Ago 12:54 PM
MedSailor
Re: 1989 Hunter 40 - A million questions.

Quote:
Originally Posted by smackdaddy View Post
Cool. Thanks Rob. I was wondering what was up.

I'll grab a few.
Those copper "crush washers" are actually one time use items. If you install something, and then find you have to re-do it an hour later, you still need a fresh washer.

MedSailor (former yanmar owner)
4 Hours Ago 11:41 AM
smackdaddy
Re: 1989 Hunter 40 - A million questions.

Quote:
Originally Posted by RobGallagher View Post
7. It's those copper washers. I keep a supply of them and replace them almost every time I bleed or remove a banjo fitting thingamabob on my Yanmar. Sadly, I don't think they are cheaper by the dozen.
Cool. Thanks Rob. I was wondering what was up.

I'll grab a few.
4 Hours Ago 11:36 AM
Barquito
Re: 1989 Hunter 40 - A million questions.

Capt - I am not enough of a metallurgist (or any other 'urgist, for that matter) to know what annealing does. Is that to harden the otherwise soft washer?
5 Hours Ago 10:53 AM
Capt Len
Re: 1989 Hunter 40 - A million questions.

Ina pinch, (of pocket?) the washers can be annealed . Hang in the propane flame. First it goes black, then red copper all over,stop don't melt. Carefully clean any scale before reusing
5 Hours Ago 10:36 AM
RobGallagher
Re: 1989 Hunter 40 - A million questions.

7. It's those copper washers. I keep a supply of them and replace them almost every time I bleed or remove a banjo fitting thingamabob on my Yanmar. Sadly, I don't think they are cheaper by the dozen.
23 Hours Ago 05:22 PM
smackdaddy
Re: 1989 Hunter 40 - A million questions.

BTW - our solar set up has been awesome. It's handled our full 24 hr. power needs with no need to run the engine at night. I'm impressed.
1 Day Ago 04:03 PM
smackdaddy
Re: 1989 Hunter 40 - A million questions.

Ralph,

Just lots of little niggling things. For example:

1. Fridge started losing power about 20 miles out of St. Pete. It was a bad ground connection. I just fixed that and we're fine.

2. As I mentioned before, we took a few big waves over the bow. One of them was big enough to knock our nav/bow light off its mount. I had to go forward - at night - in big seas - and fix that one. I've never liked the way the light was mounted on this boat, so I'll need to address that before next season.

3. Our freshwater stopped flowing. Turns out it was calcium(?) sediment in the tank. I'm fixing that now and will improve our setup prior to heading out next season.

4. Our bilge pump wasn't shutting off automatically. We never take much water, but it was starting to have trouble. I replaced it yesterday.

5. My tri-data instrument at the nav-station is failing. I'll have to send that in to Raymarine to replace for next season.

6. Our wind instrument display started getting weird. Showing the wrong direction and speed. It seems to have fixed itself.

7. I have a very, very slow fuel seep at the bleed nut below the injectors. I need to get that fixed.

8. The oil pressure switch for the OP buzzer/light failed. I replaced that yesterday and it's back to normal.

All this kind of stuff I can deal with. It's those unexpected $2K autopilot drives that are a boot to the nuts.
2 Days Ago 04:01 PM
RTB
Re: 1989 Hunter 40 - A million questions.

Hey smack, I guess your engine problems are behind you? What other problems have do you have? You mentioned that you had a lot of little problems on the BFS thread.

Ralph
4 Weeks Ago 01:50 PM
MedSailor
Re: 1989 Hunter 40 - A million questions.

Quote:
Originally Posted by RobDahlgren View Post
Smack,
Glad to hear you and the boys are back in business. I've been following this whole saga with great interest. We recently purchased one of Dawn Treader's little sisters, a 1990 Hunter 35.5. It's great boat and getting better as I work through my list of projects. Stories like yours have kept me away from the using pros for any of the work so far. I may hire Brion Toss to tune my rig the first time, but other than that I am just trying to learn to do the work myself. Eventually I will need the help of a pro, hopefully by then I will be competent enough to evaluate the quality of their work.

If I had been in your position right now, I would have trusted the mechanic as well. Maybe after owning the boat 3-4 years and understanding how everything works it would be different, but when you are just starting out you gotta trust somebody and hope for the best.



Med,
I am really interested in this. It seems like a great fit for behind an electrical panel, but will it work in the engine compartment? Our surveyor said the automatic Halon systems can just get "sucked out" through the running diesel. I assume if there was enough Halon it would kill the engine, but he recommended a fire port and portable Halon extinguisher.

The BlazeCut seems a lot simpler solution if it will work there.

Halon and it's alternatives can get sucked out through a running diesel. It is necessary to shut down the motor if it's running. Many of the engine room systems have a way to attach to the shutdown solenoid (if fitted) which automatically shuts down the engine if they're deployed. In addition even the largest blazecut is too small for anything but the smallest of engine spaces.

They're good for hard to reach places and I like the idea of putting them in along wiring runs and behind electrical panels.

MedSailor
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