A rebuild thread to keep you all happy for the long winter

sharpness said:
Good work. Not easy tasks these. I assume you have suppliers in mind for replacements of the cutless bearings, but in case needed try
T.Norris Marine ( 01243 716205 )
No connection with them, other than being a satisfied customer. Very helpful company.
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Exactly who they are coming from đź‘Šđź‘Š
 
One question…..do the cutless bearings come with holes in them? The water feed for inboard end is the normal pipe of the engine seawater circuit. Is it a case of drilling a hole then lining it up when fitting with the injection pipe?
 
Enjoying the modernisation and your ideas and approach. Those engine bay fire extinguishers look like dry powder, have you thought about replacing them for clean agent type which won't damage those engines if running during activation, just a thought.
 
Scubadoo said:
Enjoying the modernisation and your ideas and approach. Those engine bay fire extinguishers look like dry powder, have you thought about replacing them for clean agent type which won't damage those engines if running during activation, just a thought.
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Glad you are enjoying it and i think about that often. They are just so much more expensive vs powder. My thinking is that if a fire is hot enough to make one go off…….the boat at this value point is likely not economically viable to save anyway.

They could go accidentally of course in which case…..ill have made the wrong choice!

They had clean agent ones in but are from 2009 so thought better to get new ones asap that i can afford
 
Mr Googler said:
One question…..do the cutless bearings come with holes in them? The water feed for inboard end is the normal pipe of the engine seawater circuit. Is it a case of drilling a hole then lining it up when fitting with the injection pipe?
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I may be wrong, but I thought the feed water pipe usually connected to the stern gland, either a standard stuffing gland type, or dripless type like "tide seals". The feed water would then flow through the rubber flutes of the cutless bearing to keep it cool.
I'm sure T.Norris Marine can give the correct advice. I'd be interested to know what you find out.
 
Thats what i cant picture. How does the water get in the flutes. Its a standard stuffing box so i must be missing something

Ive never seen inside the housing. Ill look friday and get some photos
 
sharpness said:
I may be wrong, but I thought the feed water pipe usually connected to the stern gland, either a standard stuffing gland type, or dripless type like "tide seals". The feed water would then flow through the rubber flutes of the cutless bearing to keep it cool.
I'm sure T.Norris Marine can give the correct advice. I'd be interested to know what you find out.
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That's my understanding too, certainly how they work on mine.
 
That looks the same as mine internally. Not taken it apart any further than re-packing it, but i'd expect that the cutless bearing stops sort of the water injection inlet, or it would only inject into the flute under the hole. As sharpeness said, check with Norris to be sure.
 
PaulRainbow said:
But they're only for an area up to 3.4m3 and you should only fit one in a space.

A Sedan 36 is probably going to need a 6Kg one, ÂŁ428.99
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That’s the first I heard of that. I bought mine three years ago and I don’t remember seeing the recommendation to only fit one in an area. There’s very little free space in the engine room of my Broom. I had the big 6kg in my old boat but that had a lot more free space.
I fitted one beside the Eberspacher and the Generator and another between the turbos on the big Perkins Sabre lumps.
 
I have 2 of those fitted also. I have read that there should only be one but I simply replaced the 2 that were there when I bought the boat. I don't have room for a bigger unit. Perhaps a foolish choice?

Back to Googlers boat. Any issues getting the shafts free from the couplers? What technique did you use out of interest?
 
Dino said:
That’s the first I heard of that. I bought mine three years ago and I don’t remember seeing the recommendation to only fit one in an area. There’s very little free space in the engine room of my Broom. I had the big 6kg in my old boat but that had a lot more free space.
I fitted one beside the Eberspacher and the Generator and another between the turbos on the big Perkins Sabre lumps.
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bowler said:
I have 2 of those fitted also. I have read that there should only be one but I simply replaced the 2 that were there when I bought the boat. I don't have room for a bigger unit. Perhaps a foolish choice?

Back to Googlers boat. Any issues getting the shafts free from the couplers? What technique did you use out of interest?
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The reason for only having one is, if a fire sets one off it's possibly too small to extinguish it, so the fire carries on and gets worse, until it sets the other one off, which is now even less capable of extinguishing the fire.
 
Dino said:
That’s the first I heard of that. I bought mine three years ago and I don’t remember seeing the recommendation to only fit one in an area. There’s very little free space in the engine room of my Broom. I had the big 6kg in my old boat but that had a lot more free space.
I fitted one beside the Eberspacher and the Generator and another between the turbos on the big Perkins Sabre lumps.
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I have been told to only fit only one extinguisher in the engine bay. The logic behind it is that apparently if you have multiple small extinguishers a fire may set off one but not be properly extinguished. The fire recovers then the next one goes off etc etc. However by then the fire will have got properly started and be unstoppable. So one big one will in theory flood the engine bay and stop any fire completely - problem is where do you put it?

I had a Rodman 38 and that did not have engine bay extinguishers at all. It just had a fire port - a hole in the floor with a clear plastic window so you could stick a fire extinguisher in to the engine bay via the hole. I did in the end, buy a 6kg dry powder extinguisher and rather than fit it between the engines on a bulk head, I fitted it offset to one side near all the electrical equipment. My thinking was that most of the time the engines are off and pretty inert but the chargers etc are ON pretty much all the time in a marina. Is an electrical fire more likely than an diesel engine fire?

As to clean gas or dry powder I tend to go for dry powder as it is loads cheaper. If it is set off by fire the boat will be wrecked regardles. At best it will buy time to get off the boat. If it goes off by accident with the engines actually running I will be rather annoyed - but when did that happen? I can see the reason for fitting clean gas extinguishers on new(ish) boats with big expensive engines that an insurance company may pay to repair. But on old boats worth tens of thousands rather than hundreds of thousands is it worth it?
 
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PaulRainbow said:
But they're only for an area up to 3.4m3 and you should only fit one in a space.

A Sedan 36 is probably going to need a 6Kg one, ÂŁ428.99
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By the looks of it, googler has fitted the dry powder 2 to 3m3 which is the same issue, at a minimum I would replace those as Dino has suggested. For me personally I would worry about accidental discharge while the engines are at full chat and no idea only to find engines possibly damaged and the cost will be far greater than a few clean agent units, although never experienced that scenario and perhaps low risk.

If not already done, if you stick with dry powder install a smoke alarm that links to another smoked alarm in the cockpit or cabin, that way you will hear it and get early warning. Did this in my boat and very reliable and cheap.

If space is an issue, Stat-x maybe a cheaper option per m3, or maybe theses one that are smaller and seem lower price. FireShield Fluoroketone (FK) Inverted Automatic Fire Extinguisher
 
Scubadoo said:
By the looks of it, googler has fitted the dry powder 2 to 3m3 which is the same issue,
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Looking back, it does look a bit small.
Scubadoo said:
at a minimum I would replace those as Dino has suggested. For me personally I would worry about accidental discharge while the engines are at full chat and no idea only to find engines possibly damaged and the cost will be far greater than a few clean agent units, although never experienced that scenario and perhaps low risk.

If not already done, if you stick with dry powder install a smoke alarm that links to another smoked alarm in the cockpit or cabin, that way you will hear it and get early warning. Did this in my boat and very reliable and cheap.
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Did the same here, 2 smoke alarms, linked by wifi, from Screwfix if i recall.
Scubadoo said:
If space is an issue, Stat-x maybe a cheaper option per m3, or maybe theses one that are smaller and seem lower price. FireShield Fluoroketone (FK) Inverted Automatic Fire Extinguisher
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