Nicholas123
N/A
I have a switch that directs the current to whichever of the two batteries I choose or both at the same time so naturally I make sure the starter battery gets president.How is it any different to that?
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Boats with old(ish) engines
- Thread starter robertt
- Start date
I have a switch that directs the current to whichever of the two batteries I choose or both at the same time so naturally I make sure the starter battery gets president.How is it any different to that?
A1Sailor
...
The OP was asking about a Bukh 20HP engine, which suggest to me that the boats he is considering might be:
a. too big for an outboard
b. not "cheap"
Champagne Murphy
Well-Known Member
http://www.iboats.com/BEP-Battery-D...6927861--session_id.961824814--view_id.341116
Dunno what happened to the link before....
Dunno what happened to the link before....
mjcoon
Well-Known Member
Pitterpatter
Well-Known Member
We sold our previous boat with the original MD2B in it. Whilst old, it ran well, never had any issues starting and had only been lightly used (circa 1100 hours in 30 years). If like me, you are drawn to an older boat which is in good nick, you may well find it is in good nick as it has only been lightly used, and so you will find that the engine has only been lightly used as well. When we sold, several potential purchasers wanted the cost of a new engine off the boat. I can't blame them for trying, but at the end of the day I knew as well as they did that they were only trying to get money off and had no intention of replacing a perfectly good engine. So the boat never went to them! The only downside to that engine was the noise.
The boat we have now has a Bukh DV24. This replaced the original DV20 5 or 6 years ago, which I would hazard had been well used! I am more than pleased with it. It is not the quietest I've seen, but compared to the MD2B it is almost silent. Parts seem easily available. The only downside is that for servicing I still seem to spend half my life in the cockpit locker to get to the back of the engine. OK, it's only been a season with the new one so far but I'd have no reservations about getting another.
In general though, I wouldn't be too worried about old engines. New ones are nice, but definately not a reason to rule boats out.
Rossynant
Well-Known Member
But of course I exaggerated
Nevertheless still have a starting handle for a car...
There is still something to say for engine that can be submerged in seawater and started by hand, so small fishing boats still use such. Not that I would recommend installing in a yacht now, only no reason to throw away if somebody already has one. And I would personally change old Bukh for new, so to spare me problems with installation.
Byt it is true - old Bukh would shake some new boats to pieces, or the owner
I have a Perkins myself, but would name it industrial tractor kind, or may be even called automotive.
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snooks
Well-Known Member
And how do you decide when to switch your switch? Guess?
It's fully automatic, switch batteries on and it does the rest, no remembering to switch on or off the engine battery.
Start engine, all the charge goes to the engine battery until the voltage reaches 13.5 IIRC at which point it joins your house and engine batteries. Switch engine off, and both banks are used. When the voltage of the combined bank drops to 12.7 the Voltage Sensitive Relay opens and the battery banks are separate again. So even if you used all your house battery your engine battery is still full.
No guessing how much charge to put into the start battery, or someone turning the switch the wrong way or leaving all the batteries combined. Easy to fit and priceless. It really is a fit and forget bit of kit.
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KellysEye
Well-Known Member
One other thought about old engines is they are built like a brick *hithouse and are not lifed, modern engines are lifed to 8,000 hours and cost around £8,000 for a 50HP engine. I once asked Volvo haw much it would cost to build a modern engine to the build quality of the MD series and they said £16,000 which is why they don't do it.
Tranona
Well-Known Member
It does a similar job automatically and charges the engine start battery first then the house battery. The two banks are kept quite separate so you can't run down your engine start by mistake.
21st century, well late 20th anyway.
Tranona
Well-Known Member
You would be lucky to get an old Volvo to run 8000 hours. It would rot away long before that. 8000 hours is over 50 years of typical yacht use.
glashen
Well-Known Member
The argument usually goes beyond pure economics, if you have spent a lot of effort getting the boat together you may not want to start again with a (to some extent unknown quantity) I appreciate that others will decide differently but having had a Trident 24 for 25 years which I put a new engine in 8 years ago, I'm still happy with the decision. The value increased by maybe a 1/3rd of the cost but that wasn't the point. Old boats need continual work to keep them up, but they do reward the effort. The way I see it is like buying an airline ticket, it isn't worth anything after use but it gets you where you want to be.
dylanwinter
Well-Known Member
the noise
although diesel noise is annoying
outboards are ten times as bad
although diesel noise is annoying
outboards are ten times as bad
Blueboatman
Well-Known Member
True story: When I bought current boat, we all accepted a fair price; broker, seller, buyer.
And I just assumed that at some point it would need a new engine. Probably not right away but at some point..
And I was particularly looking for a boat that would benefit from a refit and would lend itself, quality and construction-wise, to that. So a re-engine would fit in with that at some point too.
And heres the kicker...We all spend 10 or 15% of the value of our boat, annually, er, dont we?
To keep 'em in tip top condition. That is part of the running costs, joy and satisfaction of owning and using same
So, one engine= 10 or 15% of the value of the boat.. Simples
Don't be mean, don't be greedy, try to get 'some' adjustment overall on the price if you like it, and just accept that boats take time and money and are going to be fun..
Sooo, I would say don't discount an older engined boat out of hand, better to factor in a future replacement engine which will give YOU a better boat, just don't go relying on a boats secondhand engine/'overhaul'/fettling/history per se, whatever the age or declared hours..
I think the previous owner of mine was a tad surprised tho that I didn't actually leap to start the engine when viewing, esp as he'd gone to the trouble to warm it up n all, phnarr phnarr..
And I just assumed that at some point it would need a new engine. Probably not right away but at some point..
And I was particularly looking for a boat that would benefit from a refit and would lend itself, quality and construction-wise, to that. So a re-engine would fit in with that at some point too.
And heres the kicker...We all spend 10 or 15% of the value of our boat, annually, er, dont we?
To keep 'em in tip top condition. That is part of the running costs, joy and satisfaction of owning and using same
So, one engine= 10 or 15% of the value of the boat.. Simples
Don't be mean, don't be greedy, try to get 'some' adjustment overall on the price if you like it, and just accept that boats take time and money and are going to be fun..
Sooo, I would say don't discount an older engined boat out of hand, better to factor in a future replacement engine which will give YOU a better boat, just don't go relying on a boats secondhand engine/'overhaul'/fettling/history per se, whatever the age or declared hours..
I think the previous owner of mine was a tad surprised tho that I didn't actually leap to start the engine when viewing, esp as he'd gone to the trouble to warm it up n all, phnarr phnarr..
Tranona
Well-Known Member
Well said. I have read engined my boat twice in the 30 odd years I have had it. If you are a long term owner the measure is the value you get out of it not the cost in relation to market value.
cliff
Well-Known Member
BS - one can in practice start a DV24 by hand crank but like most things there is a knack to getting it to fire up first time. Yes, I do hand crank my old DV24 into life from time to time - just to prove to myself I have not "lost it" and yes I have had to do it in anger when SHMO has flattened all the batteries while watching movies and running the microwave etc and leaving the lights on half the night... No worries though just get the old crank handle out and give it some welly. - can't do that with a marinised tractor engine....
scottie
Well-Known Member
No longer trading some staff at Fettes & Rankine at kip though!
Tranona
Well-Known Member
BS - one can in practice start a DV24 by hand crank but like most things there is a knack to getting it to fire up first time. Yes, I do hand crank my old DV24 into life from time to time - just to prove to myself I have not "lost it" and yes I have had to do it in anger when SHMO has flattened all the batteries while watching movies and running the microwave etc and leaving the lights on half the night... No worries though just get the old crank handle out and give it some welly. - can't do that with a marinised tractor engine....
But if you had a well set up charging system as snooks suggested you would not end up with a flat battery.
I used to start my Stuart Turner by hand but my then labrador seadog hated it so reliable electric starting on the replacement Yanmar was a boon.
cliff
Well-Known Member
The DV20 is not the same as the DV24 - the extra 4 hp comes from the change from indirect to direct injection and different heads - granted the blocks are the same but the heads and fuel systems are totally different - note there is no "BV24" in the Bukh rangeIt's now called BV24 - main block the same, just new standard of measurement gives bigger number of horses
Rossynant
Well-Known Member
Yup, my mistake, only in this post; DV that is As DV 20 too.
Direct injection was necessary for environmental issues also. As for horsepower - old DIN measurement was different. I'm not sure how much difference there is, but usually it was about 10% less then now.
As DV 20 too. Direct injection was necessary for environmental issues also. As for horsepower - old DIN measurement was different. I'm not sure how much difference there is, but usually it was about 10% less then now.
LittleSister
Well-Known Member
Ah, there may have been fewer of them, but they'm were proper British horses, as invented by James Watt. Built an empire on 'em we did. None of your foreign, fly-by-night, namby-pamby modern 'orses. No wonder they need more of 'em these days.
