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Post by TonyDunkley on Feb 25, 2019 18:13:26 GMT
What is make, model and bhp of your engine ? What type of cooling system - heat-exchanger, and if so is it wet or dry exhaust, or if it's keel-cooled/skin tank, what is the total immersed surface area of piping or tank, and is it equipped with baffles to stop the hot water from the engine taking a shortcut from the tank inlet connection to the outlet ? It's a Vetus M4.14 and 33hp. Uses a heat exchanger, that much I know. As for wet/dry exhaust - I'm not entirely sure, and not entirely sure what that is! I feel like, from a brief bit of googling for "wet or dry exhaust", it might be a wet exhaust as it has a hose that looks like it allows water from the outside of the boat into the engine (or exhaust system or something else). If you're absolutely sure it's heat exchanger cooled then that's fine - overheating on the river shouldn't be a problem. When you're having the engine serviced, get the fitter to leave at least one, preferably two, spare primary fuel filter elements to carry with you. If you've no primary filter get two elements for the filter that's mounted on the engine, and if your engine's got one of those Vetus electric fuel lift pumps with that daft little filter under the end-cap, then get a couple spares of that element too. With the second (sea/raw water) circulating pump on a heat exchanger cooled engine, you should always carry a spare pump impeller too.
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Post by TonyDunkley on Feb 25, 2019 18:30:48 GMT
. . . . . . it is perfectly normal on a narrow boat to have a skin tank and a heat exchanger cooled engine. No, . . it isn't ! You can't use skin tanks, or keel cooling pipes, for the sea/raw water circulation side of a engine heat exchanger - OK for gearbox oil-coolers, but not for engine cooling. Many canal pleasure boat installations with skin tanks use a combined heat exchanger/manifold/header tank casting/body but with the heat exchanger tube stack removed and the raw water connections on the tube stack end-caps blanked off. At first glance it looks like a heat exchanger cooled engine, but the lack of a Jabsco type raw water circulating pump and the connections to the heat exchanger give the game away.
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Post by Deleted on Feb 25, 2019 19:17:01 GMT
A dry exhaust on a narrow boat means a skin tank. Why do you think there is no skin tank? I bet there is one. Eta it is perfectly normal on a narrow boat to have a skin tank and a heat exchanger cooled engine. Because it sounds to me like it either has a skin tank or a heat exchanger, and it definitely has a heat exchanger. If it can have both then it may well have a skin tank. But I've not seen one (although I don't know what I'd be looking for, to be fair) and I have seen a heat exchanger and have discussed the heat exchanger with an engineer when I had to change the heat exchanger rubber boot/pipe that had perished. At the very least, it has a heat exchanger (part 18)
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Post by TonyDunkley on Feb 25, 2019 21:28:15 GMT
Alistair (welly),
Let me know if there are any stoppages that will force you into changing your plans for getting away from the bottom end of the Junction (Ricky/Apsley area) on the 16th of March.
The second or third biggest tide of the year (Equinoctial Springs) is predicted to make 8.42 m's at 1927 hrs on Friday 22 March at Hull, so there'll still be plenty of water in the lower Trent by the time you get there. If it's rained a lot and you want or need any help from Leicester on - where you leave the canal for the Soar then the Trent - then let me know, and we can also work out some times/days for getting you down to Keadby.
You can contact me on here, or e-mail < Canalrivertransport@mail.com >, or by phone on 07553 294325.
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Post by thebfg on Feb 25, 2019 21:53:44 GMT
Welly, your in safe hands. When the time comes just sit back and enjoy it.
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Post by Deleted on Feb 25, 2019 22:05:43 GMT
Alistair ( welly), Let me know if there are any stoppages that will force you into changing your plans for getting away from the bottom end of the Junction (Ricky/Apsley area) on the 16th of March. The second or third biggest tide of the year (Equinoctial Springs) is predicted to make 8.42 m's at 1927 hrs on Friday 22 March at Hull, so there'll still be plenty of water in the lower Trent by the time you get there. If it's rained a lot and you want or need any help from Leicester on - where you leave the canal for the Soar then the Trent - then let me know, and we can also work out some times/days for getting you down to Keadby. You can contact me on here, or e-mail < Canalrivertransport@mail.com >, or by phone on 07553 294325. Brilliant, thanks very much! I'll be in touch closer to the time (of course I'll be on here as well) and we can figure out the details. Cheers!
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Post by phil70 on Feb 25, 2019 23:18:49 GMT
Oh and welcome aboard Welly Phil
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Post by Deleted on Feb 26, 2019 5:19:12 GMT
. . . . . . it is perfectly normal on a narrow boat to have a skin tank and a heat exchanger cooled engine. No, . . it isn't ! OK. I should have said its perfectly normal to see an engine with what appears to be a heat exchanger on it cooled via a skin tank. Anyway from the labelled image welly posted its a heat exchanger cooled wet exhaust unit.
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Post by patty on Feb 26, 2019 6:30:09 GMT
Looks as if You are getting organised... hope u have a fab trip and post details and pics on here... here’s hoping for fine weather no stoppages and whatever else ....
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Post by Deleted on Feb 26, 2019 8:32:51 GMT
OK. I should have said its perfectly normal to see an engine with what appears to be a heat exchanger on it cooled via a skin tank. Anyway from the labelled image welly posted its a heat exchanger cooled wet exhaust unit. All useful information for me! While I've been on the cut for 4 years, that bit at the back that I stand on and makes my feet vibrate is still something of an unknown quantity to me. Although I'm getting better. Cheers!
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Post by JohnV on Feb 26, 2019 8:34:20 GMT
OK. I should have said its perfectly normal to see an engine with what appears to be a heat exchanger on it cooled via a skin tank. Anyway from the labelled image welly posted its a heat exchanger cooled wet exhaust unit. that bit at the back that I stand on and makes my feet vibrate is still something of an unknown quantity to me. Cheers!
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Post by Deleted on Feb 26, 2019 8:44:40 GMT
Well I still think its a skin tank cooled engine because @welly said it does not spit water out of the exhaust. Or maybe it has a water/gas separator system to quieten it down.
I wonder if this is an engine which was originally a wet exhaust and it had been modified to using a skin tank because of aggrevation with the inlet filter getting blocked.
That would explain the heat exchanger but lack of water coming out of the exhaust pipe.
Is the exhaust pipe off the engine made of metal (possibly lagged) or black rubber (not lagged).
Eta whatever type of cooling it is its worth knowing. If it is a wet exhaust system pulling water from the canal for cooling via a heat exchanger you definitely need to know the procedure for cleaning the inlet filter or mud box.
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Post by pearley on Feb 26, 2019 9:46:12 GMT
Should point out that the Trent locks except Cromwell are unmanned until 1 April. Not a big deal as you can operate them yourselves but a lot of ladder climbing if you're on your own.
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Post by TonyDunkley on Feb 26, 2019 10:35:30 GMT
Oh dear, . . . has 'welly' been led up the garden path by those awful people on Thunderboat ?
Posted on CWDF's - "River Trent assistance! (Middle of March 2019)" - yet another earth shattering revelation, . . . the route to Leeds we should have told him about ! : -
"The option of course, is the Manchester Ship Canal. Depends which part of Yorkshire you're trying to get to I suppose."
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Post by freewind on Feb 26, 2019 14:59:50 GMT
Well I still think its a skin tank cooled engine because @welly said it does not spit water out of the exhaust. Or maybe it has a water/gas separator system to quieten it down. I wonder if this is an engine which was originally a wet exhaust and it had been modified to using a skin tank because of aggrevation with the inlet filter getting blocked. That would explain the heat exchanger but lack of water coming out of the exhaust pipe. Is the exhaust pipe off the engine made of metal (possibly lagged) or black rubber (not lagged). Eta whatever type of cooling it is its worth knowing. If it is a wet exhaust system pulling water from the canal for cooling via a heat exchanger you definitely need to know the procedure for cleaning the inlet filter or mud box. The problem with older boats is that having passed through many owners,who may well have buggered about with various systems it is sometimes difficult to know exactly what you have got. In my case,I have had problems with the cooling system,(Tony Dunkley has advised) mainly inlet strainer blockage.It's direct raw water cooled in that a Jabsco pump sucks canal water through a seacock with a strainer in it and through a Vetus water filter then around the engine block and out of a pipe at the side.There is a bypass linked in to release water into the exit pipe when the engine thermostat is closed. On a trip last weekend,from Aspley to Sowerby Bridge,I had to clear the inlet strainer three times.Having tried several different inlet strainers It is still as bad.Using a finer inlet filter,it blocks very quickly.Using a coarser one then the Vetus filter blocks.I don't know what cooling system my boat had from new,but it probably wasn't what it's got now. Having given this a great deal of thought,I think I have been barking up the wrong tree.Other boats I have seen with raw water cooling have a double engine pulley.A large diameter one and a smaller one.The large one drives the alternator with it's own belt,and the smaller one drives the water pump again with it's own belt. On my setup there is only a single large engine pulley and a single belt driving both the alternator and the Jabsco pump.The Jabsco pump is probably spinning at close to engine rpm and will be sucking in far more water than is required and also sucking harder than necessary. If I can trace a double engine pulley for a BMC 1500 then I will try that,to see if my theory is correct.If not then I will have to keep rodding the seacock every two or three hours cruising. It really is a bloody nuisance. Just thought. The crankshaft pulley is actually larger diameter than the Jabsco pulley,so the Jabsco is running faster than engine rpm. I would guess that it should run at about half engine speed.
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