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Post by freewind on Dec 23, 2018 17:32:48 GMT
Hello everyone.Just joined. Had a Norman cruiser,but now have a 30ft narrowboat built 1978,BMC 1500 direct [pain in the arse] water cooled.Owned for nearly two years,and like it very much. Looking forward to joining in the banter on here. Hello, and welcome to TB, . . perhaps we can help out with your 'pain in the arse' engine. A company called Newage marketed the BMC 1.5 diesel engine - (originally used in the BMC J4 Van, of which the Post Office/Royal Mail had thousands in the 1960's) - as a marine engine under the name of the Newage/BMC 'Captain' rated at 36 Bhp @ 3,600 Rpm, and with a Newage manual FNR gearbox. In their original form they were direct/raw water cooled with the water being circulated via a belt driven 'Jabsco' pump, a low temperature (around 50 - 55 degrees Celsius) thermostat, and a manually operated hand-wheel valve by-pass. After circulating round the block and head jackets the cooling water went into the water jacketed/cooled exhaust manifold and, usually, was finally discharged overboard via an 'injection bend' into a 'wet' exhaust system. Is this the set-up you have, or is it a DIY conversion of an automotive engine ? Does the 'pain in the arse' factor arise purely out of weed and muck blocking the water intake strainer, or are you just having general temperature control problems ?
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Post by Deleted on Dec 23, 2018 17:50:44 GMT
Welcome to the number one boat related forum. There's members here who know loads of good stuff. But some of us are just here for the chat. Jump in and get posting Oh ... and merry christmas. Rog
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Post by TonyDunkley on Dec 23, 2018 17:58:08 GMT
Hello, and welcome to TB, . . perhaps we can help out with your 'pain in the arse' engine. A company called Newage marketed the BMC 1.5 diesel engine - (originally used in the BMC J4 Van, of which the Post Office/Royal Mail had thousands in the 1960's) - as a marine engine under the name of the Newage/BMC 'Captain' rated at 36 Bhp @ 3,600 Rpm, and with a Newage manual FNR gearbox. In their original form they were direct/raw water cooled with the water being circulated via a belt driven 'Jabsco' pump, a low temperature (around 50 - 55 degrees Celsius) thermostat, and a manually operated hand-wheel valve by-pass. After circulating round the block and head jackets the cooling water went into the water jacketed/cooled exhaust manifold and, usually, was finally discharged overboard via an 'injection bend' into a 'wet' exhaust system. Is this the set-up you have, or is it a DIY conversion of an automotive engine ? Does the 'pain in the arse' factor arise purely out of weed and muck blocking the water intake strainer, or are you just having general temperature control problems ? This is all nonsense. As usual Maybe so, . . . but at least it's top quality nonsense !
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Post by freewind on Dec 23, 2018 18:05:02 GMT
Thank you for your reply Mr.Dunkley. Yes the PITA is indeed from having to clear the water inlets, There is no manual control for the by-pass,but to ensure that the by-pass doesn't rob the engine of cooling water,I have fitted a restrictor in the form of a smaller diameter pipe in the by-pass.It is a dry exhaust. I know it should have a 50-60 degree thermostat,but I have been unable to find one for the BMC 1500,so have fitted the coolest one I could find [70 degrees]When I bought the boat there was no thermostat fitted. The gearbox fitted is a Hurth,don't know which model. After a days cruising all I want is a shower,my tea, a bottle of Guinness a bit of telly and bed.Having to check the water inlet strainers and the water filter is a bit of a nuisance,and flushing the engine water jacket out when I fill the water tank,but it has all worked well for nearly two years.I was thinking of having a keel cooled radiator fitted when next out for blacking,but perhaps I am better off with the devil I know. Any way,thank you for your welcome.
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Post by Deleted on Dec 23, 2018 18:10:19 GMT
freewindI would suggest a double filtration system in the inlet. First one should be a mud box with a gauze of some sort to take out the larger items like weed. I use disposable barbeque grill for this. Second filter a bit finer to remove anything which would damage the jabsco. Its a bit awkward to sort this after install but worth looking into as its a bit of a ball ache otherwise. Or get a skin tank fitted. BMC 1.5 is quite big in a 30 footer. Eta have you got a Hancock and Lane Marlin ? Just a wild guess.
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Post by freewind on Dec 23, 2018 19:50:36 GMT
Hello, and welcome to TB, . . pe rhaps we can help out with your 'pain in the arse' engine.A company called Newage marketed the BMC 1.5 diesel engine - (originally used in the BMC J4 Van, of which the Post Office/Royal Mail had thousands in the 1960's) - as a marine engine under the name of the Newage/BMC 'Captain' rated at 36 Bhp @ 3,600 Rpm, and with a Newage manual FNR gearbox. In their original form they were direct/raw water cooled with the water being circulated via a belt driven 'Jabsco' pump, a low temperature (around 50 - 55 degrees Celsius) thermostat, and a manually operated hand-wheel valve by-pass. After circulating round the block and head jackets the cooling water went into the water jacketed/cooled exhaust manifold and, usually, was finally discharged overboard via an 'injection bend' into a 'wet' exhaust system. Is this the set-up you have, or is it a DIY conversion of an automotive engine ? Does the 'pain in the arse' factor arise purely out of weed and muck blocking the water intake strainer, or are you just having general temperature control problems ? This is all nonsense. As usual
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Post by freewind on Dec 23, 2018 19:52:14 GMT
No,it pretty much describes my engine and cooling system.
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Post by freewind on Dec 23, 2018 19:54:28 GMT
freewind I would suggest a double filtration system in the inlet. First one should be a mud box with a gauze of some sort to take out the larger items like weed. I use disposable barbeque grill for this. Second filter a bit finer to remove anything which would damage the jabsco. Its a bit awkward to sort this after install but worth looking into as its a bit of a ball ache otherwise. Or get a skin tank fitted. BMC 1.5 is quite big in a 30 footer. Eta have you got a Hancock and Lane Marlin ? Just a wild guess.
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Post by Deleted on Dec 23, 2018 19:56:54 GMT
Its a bit of a contentious subject on here as to whether TonyDunkley knows anything at all but I tend to go for the theory that he does, personally. I think Mr Stabby may wish to disagree with this. That is if he is not too busy with his inflatable doll "shania"
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Post by Mr Stabby on Dec 23, 2018 20:05:04 GMT
Its a bit of a contentious subject on here as to whether TonyDunkley knows anything at all but I tend to go for the theory that he does, personally. I think Mr Stabby may wish to disagree with this. That is if he is not too busy with his inflatable doll "shania" Well, put it this way. I don't think Ricco will be calling on his "help" again.
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Post by Deleted on Dec 23, 2018 20:07:36 GMT
Thank you for your reply Mr.Dunkley. Yes the PITA is indeed from having to clear the water inlets, There is no manual control for the by-pass,but to ensure that the by-pass doesn't rob the engine of cooling water,I have fitted a restrictor in the form of a smaller diameter pipe in the by-pass.It is a dry exhaust. I know it should have a 50-60 degree thermostat,but I have been unable to find one for the BMC 1500,so have fitted the coolest one I could find [70 degrees]When I bought the boat there was no thermostat fitted. The gearbox fitted is a Hurth,don't know which model. After a days cruising all I want is a shower,my tea, a bottle of Guinness a bit of telly and bed.Having to check the water inlet strainers and the water filter is a bit of a nuisance,and flushing the engine water jacket out when I fill the water tank,but it has all worked well for nearly two years.I was thinking of having a keel cooled radiator fitted when next out for blacking,but perhaps I am better off with the devil I know. Any way,thank you for your welcome.Raw water cooling shouldn’t be too much of a pain if it’s well designed - frequently well designed and boat building (particularly narrow boat building) don’t go together! Some photos of your raw water intake would help to see what can be done to improve your existing set up before going down the keel cooled route. it is a shame you have a dry exhaust on a raw water cooled engine - one of the biggest benefits is a wet, cool quieter exhaust, the fact they piped it overboard without using the water to your advantage may give a clue to how well the entire system is configured.
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Post by kris on Dec 23, 2018 20:10:13 GMT
Tony has given me useful imformation about my engine on numerous occasions.His knowledge of the Trent and its tides are definately very handy for anybody venturing onto this waterway.
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Post by Mr Stabby on Dec 23, 2018 20:17:43 GMT
Tony has given me useful imformation about my engine on numerous occasions.His knowledge of the Trent and its tides are definately very handy for anybody venturing onto this waterway. That may be so, but the "help" Dickhead Dunkley gave to Ricco was appallingly fuckwitted, clearly demonstrated that he doesn't have a clue about diesel engines, and resulted in Ricco receiving a CRT overstay notice before he decided to sack the senile old coffin-dodger off and get his engine looked at by someone who knew what they were doing.
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Post by freewind on Dec 23, 2018 20:26:49 GMT
freewind I would suggest a double filtration system in the inlet. First one should be a mud box with a gauze of some sort to take out the larger items like weed. I use disposable barbeque grill for this. Second filter a bit finer to remove anything which would damage the jabsco. Its a bit awkward to sort this after install but worth looking into as its a bit of a ball ache otherwise. Or get a skin tank fitted. BMC 1.5 is quite big in a 30 footer. Eta have you got a Hancock and Lane Marlin ? Just a wild guess.
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Post by freewind on Dec 23, 2018 20:27:32 GMT
freewind I would suggest a double filtration system in the inlet. First one should be a mud box with a gauze of some sort to take out the larger items like weed. I use disposable barbeque grill for this. Second filter a bit finer to remove anything which would damage the jabsco. Its a bit awkward to sort this after install but worth looking into as its a bit of a ball ache otherwise. Or get a skin tank fitted. BMC 1.5 is quite big in a 30 footer. Eta have you got a Hancock and Lane Marlin ? Just a wild guess.
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