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Post by Deleted on Apr 4, 2020 7:59:54 GMT
naughtyfox ... do you mind if I ask ... you've just made five consecutive posts with no one else posting inbetween ... so you weren't responding to others comments. Why not make one post with your five 'points' included ... or does your postcount REALLY matter that much ? Obviously it doesn't matter, and you should carry on as you wish ... just curious on a quiet Saturday. Rog
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Post by naughtyfox on Apr 4, 2020 8:00:42 GMT
there is a tiny gleam of oil/diesel at junction of filter and the "distributer". The filter is tight, It was a helluva job to get the old one off. Spark plugs flooded? After turning engine round so many times and not firing. Fuel filters should be hand tight and then 'a quarter turn'. A leather strap tool (fuel filter wrench?) can help to turn the metal body, or use a leather belt, or a pair of water pump pliers:
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Post by naughtyfox on Apr 4, 2020 8:05:11 GMT
Yet I have been told that it's complete nonsense to start a diesel engine with throttle open, because it is fully open anyway before the engine starts. Glow plug(s) - how old are they? Do they work? We have one and I can easily lean over the edge of the engine room to touch our glow plug chamber body to see how hot is is getting - the instructions say 20 seconds, I usually give 30 seconds, then perhaps another 30 seconds. At this stage the body is too hot to touch so I reckon the air inside is nice 'n' warm too! But the people who renovated our engine, when I told them that the mechanic at a certain boatyard said 'Bukhs need to be started with the throttle open / morse lever forward a bit' said he obviously knows fuck all about how a diesel engine works. However: Once the temperature gets below around 8 degrees in my engine hole starting with a good bit of throttle is the only way to go. Without throttle, regardless of how long I operate the heater plugs the engine 'dawdles' for a good couple of minutes, barely turning over. Applying throttle while this is going on makes no difference. However, if I start with a good bit of throttle it sometimes (not always) roars away straight away. I don't know much at all about diesel engines, but was told by TW Marine that the governor is at the fully open position when engine not running, so opening the throttle will do absolutely nothing more. Something like that. There is a lot to learn once you get a narrowboat - like our water pump issue, for instance - I had never opened a water pump before, and was puzzled why the shaft didn't turn as it should (finally discovering that was because it was seized solid).
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Post by Deleted on Apr 4, 2020 8:06:11 GMT
Spark plugs ?
Rog
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Post by naughtyfox on Apr 4, 2020 8:07:53 GMT
naughtyfox ... do you mind if I ask ... you've just made five consecutive posts with no one else posting inbetween ... so you weren't responding to others comments. Why not make one post with your five 'points' included ... or does your postcount REALLY matter that much ? Obviously it doesn't matter, and you should carry on as you wish ... just curious on a quiet Saturday. Rog It's because I woke up just half-hour ago (privilege of the unemployed!) and was going through socks' posts. I think you'll agree my posts have been quite sensible this morning, so be happy with that. Anyway, talk about a copycat - who do you think you are - Johnv??!!
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Post by naughtyfox on Apr 4, 2020 8:08:27 GMT
All five of them need to be taken out to see if they're wet.
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Post by Telemachus on Apr 4, 2020 8:10:45 GMT
Socks; you said earlier in the thread that you tried with no throttle, can I suggest you try starting with the throttle lever pushed half way forward and do give the glow plugs a good work out of a 10 count or more Phil Yet I have been told that it's complete nonsense to start a diesel engine with throttle open, because it is fully open anyway before the engine starts. Glow plug(s) - how old are they? Do they work? We have one and I can easily lean over the edge of the engine room to touch our glow plug chamber body to see how hot is is getting - the instructions say 20 seconds, I usually give 30 seconds, then perhaps another 30 seconds. At this stage the body is too hot to touch so I reckon the air inside is nice 'n' warm too! But the people who renovated our engine, when I told them that the mechanic at a certain boatyard said 'Bukhs need to be started with the throttle open / morse lever forward a bit' said he obviously knows fuck all about how a diesel engine works. I agree with you in the main. The throttle isn’t really a throttle like in a petrol engine, it is a governor rpm selector. In the neutral position, it is trying to achieve idle rpm and since before starting the rpm is zero, the governor has the fuel control bar fully open (maximum fuel) to try to increase the rpm. It makes no difference to the amount of fuel injected when the engine is first cranked, whether the throttle is in neutral/idle, or fully open. There are however a couple of caveats to that, one being that some engines have an excess fuel device that when you fully open the throttle and press a button, it moves the fuel bar beyond its normal stop. The excess fuel helps to increase the compression ratio and thus aid cold starting. Secondly once the engine does fire, if the throttle is at idle the engine will try to run at idle. With thick oil and a heavy load on the alternator, the engine may end up labouring somewhat below normal idle speed which probably isn’t the best thing for it. Our boat with its 175A alternator and good pulley ratios can put out about 140A at idle when the batteries are low. The low rpm and high alternator load maximises belt tension / wear/ potential slippage / side force on the crankshaft. At higher rpm the belt load is much less and the engine not operating near its maximum torque for the rpm. Some folk set their throttle well open and the engine roars up to 2000rpm or whatever, straight from cold, which probably isn’t very good for it either. So we set the throttle to give about 1200rpm (normal idle 850). high enough to avoid labouring at max torque for the rpm, and not so high as to be racing just as the oil starts to circulate and making frantic noise.
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Post by Deleted on Apr 4, 2020 8:11:41 GMT
Spark plug ?
I really think you need to stop giving diesel engine advice.
Rog
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Post by naughtyfox on Apr 4, 2020 8:11:51 GMT
Yet I have been told that it's complete nonsense to start a diesel engine with throttle open, because it is fully open anyway before the engine starts. Glow plug(s) - how old are they? Do they work? We have one and I can easily lean over the edge of the engine room to touch our glow plug chamber body to see how hot is is getting - the instructions say 20 seconds, I usually give 30 seconds, then perhaps another 30 seconds. At this stage the body is too hot to touch so I reckon the air inside is nice 'n' warm too! But the people who renovated our engine, when I told them that the mechanic at a certain boatyard said 'Bukhs need to be started with the throttle open / morse lever forward a bit' said he obviously knows fuck all about how a diesel engine works. if I start with a good bit of throttle it sometimes (not always) roars away straight away. Nothing quite like a cold diesel engine roaring away as soon as it starts, all that bare metal rubbing against dry metal. Best thing you can do for a diesel engine, rev the bollocks out of it whilst still cold. Instructions for our engine say DO NOT increase engine revs until engine is warm (ie. engine coolant thermometer showing 60 degrees Centigrade).
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Post by naughtyfox on Apr 4, 2020 8:17:41 GMT
... so you weren't responding to others comments. Yes I was - every comment of mine has a quote above.
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Post by Deleted on Apr 4, 2020 8:18:02 GMT
Beta now insist (on new engines) starting and running at 1500rpm for five minutes before dropping to 1200rpm because of the large alternator loads as described by Telemachus. Don't worry about your spark plugs they'll be fine Rog
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Post by ianali on Apr 4, 2020 8:21:25 GMT
Beta now insist (on new engines) starting and running at 1500rpm for five minutes before dropping to 1200rpm because of the large alternator loads as described by Telemachus. Don't worry about your spark plugs they'll be fine Rog All good engines have spark plugs. This is one reason I Prefer petrol engines.
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Post by naughtyfox on Apr 4, 2020 8:28:18 GMT
Beta now insist (on new engines) starting and running at 1500rpm for five minutes before dropping to 1200rpm because of the large alternator loads as described by Telemachus . Yes, noted - I should ask TW about this next time we see them - or I could give the throttle 'a bit of welly' when the engine is starting from cold - although it has always started nicely so I am happy to leave it as it is. Another thing I do sometimes is to turn the decompression lever (all within easy reach of our kitchen steps) so that the engine can run without starting, to let the oil go round the bearings, or to turn the flywheel by hand to have all the bits in the engine turn a bit before starting it. To give it a gentle 'wake-up' so's to say. My theories... could be wrong. Anyway, as to socks' problem - no-one here wants to pop over to have a looky?
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Post by Deleted on Apr 4, 2020 8:33:32 GMT
Beta now insist (on new engines) starting and running at 1500rpm for five minutes before dropping to 1200rpm because of the large alternator loads as described by Telemachus . Anyway, as to socks' problem - no-one here wants to pop over to have a looky? What is the new problem?
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Post by ianali on Apr 4, 2020 8:39:11 GMT
Anyway, as to socks' problem - no-one here wants to pop over to have a looky? What is the new problem? Wines run out?
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