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LadyAnnya
United Kingdom
81 Posts |
 Posted - 12 Apr 2012 : 20:12:55
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A question. I have over the winter had the O/B serviced, new impeller and some expensive seals. Collected the boat last weekend. The other day, I noticed that when I started her up and she is in fast idle water comes, not only from the tell tale, but also from somewhere at the rear of the engine splashing onto the bracket, just below the top "hinge". Is this just a case of me not noticing this before, I am sure that when I had a scaled up tell tale, I could see no water anywhere. Thin solder up the outlet cured that (being soft cant damage the soft tubing?) The boatyard say this is just an overflow, because of the amount of water being pumped through (new impeller?). Just that I don't have that warm fuzzy feel about this and don't wish be stuck during the season with a dead O/B. Anyone know of Honda 15 cooling water overflows?
Lady Annya
Broadminded
LA Norfolk |
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LadyAnnya
United Kingdom
81 Posts |
Posted - 12 Apr 2012 : 21:19:26
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just to add one thing, might make all the difference? When the engine is actually working, ie. in gear and driving the boat, the only water is from the tell tale?
Broadminded
LA Norfolk |
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df
United Kingdom
5994 Posts |
Posted - 13 Apr 2012 : 07:30:15
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It's not just the exhaust bubbling up on fast idle is it?
NBAS--The communal colostomy bag of the boating community.
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carpetbloke
United Kingdom
194 Posts |
Posted - 13 Apr 2012 : 08:03:22
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| You do tend to get a little out of the exhaust, I do on mine anyway and that sounds like what you`re describing. |
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LadyAnnya
United Kingdom
81 Posts |
Posted - 13 Apr 2012 : 18:48:00
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I thought it might just be bubbling up, but it is definitely pumped water from the just below where the motor sits on the bracket. All else seems okay. I'll have another look tomorrow. I'm collecting her to go back on her mooring. A fun way to spend the day, 3hrs boat and 7 on the A12 etc...!
Cheers
Broadminded
LA Norfolk |
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tigtog
United Kingdom
421 Posts |
Posted - 13 Apr 2012 : 20:17:12
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| ive got a mertcury 20hp 2 stroke on my norman, mine does the same thing regards the 2nd water jet, been doing it since ive had the boat/engine. |
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adi-n-chez
United Kingdom
1980 Posts |
Posted - 13 Apr 2012 : 21:39:20
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Never seen it on a BF 15 but have seen water exiting as a '2nd telltale' on Mariners - Usually a stuck thermostat.
Adi
Sewer Tubes ? I'd rather have a D**ncr*ft (Only Kidding) |
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tigtog
United Kingdom
421 Posts |
Posted - 14 Apr 2012 : 17:40:49
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some pictures of mine doing it.......
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LadyAnnya
United Kingdom
81 Posts |
Posted - 15 Apr 2012 : 10:49:03
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Thanks all. It does seem to be something of the sort. Ran and looked at her yesterday and all seemed well. Ran quiet and cool, so all seems okay. Thanks again.
Broadminded
LA Norfolk |
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df
United Kingdom
5994 Posts |
Posted - 15 Apr 2012 : 17:53:28
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If you need to know the engine temp of your outboard I just made a gadget for Leo that gives me water and oil temps for both engines as well as ambient engine bay temp and displays digital degrees on lcd screen as well doing remote starting and pre-heat timing, a plain engine water/oil temp readout for outboard would be dead easy with the main components costing less than £20, just glue one temp sender to water jacket and tape one to oil filter, you only need 3 wires up to the dash.
http://youtu.be/VWphTR7yP5g
Take away the auto start and clock and the rest is very easy.(if I can work it out anyone can)
NBAS--The communal colostomy bag of the boating community.
Visit leomagill.co.uk |
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LadyAnnya
United Kingdom
81 Posts |
Posted - 18 Apr 2012 : 19:34:49
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I like the idea of engine/oil temp reading. Used to have that on my old BMC engine. Where did you find the bits? What bits?
Broadminded
LA Norfolk |
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df
United Kingdom
5994 Posts |
Posted - 18 Apr 2012 : 20:40:58
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Picaxe chip £3.60(pic for idiots), a couple of ds18b20 temp sensors £2.50 each, and an lcd display £7, 5volt regulator and a few resistors/capacitors (couple of quid) and your sorted, just got to program it then.
Makes for an interesting learning curve too.
NBAS--The communal colostomy bag of the boating community.
Visit leomagill.co.uk |
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LadyAnnya
United Kingdom
81 Posts |
Posted - 24 Apr 2012 : 18:58:42
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Hi Df. Having thoughts along similar lines.... 3 cooking thermometers (Amazon), arrived today £2.50ea! Easy to dismantle -50 to 300C, should even read low enough for Norfolk!!! When I've finished fiddling, I'll drop a line
Broadminded
LA Norfolk |
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df
United Kingdom
5994 Posts |
Posted - 24 Apr 2012 : 20:22:05
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Will they give a decent display and run off the boats electrics?
I've seen 16x2 backlit lcd's for as little as £3 on ebay, just need the chip to drive them.
If you have thermocouple type sensors and extend the wires you will throw the calibration right out unless you use the same type wire, a different material (type J/type K etc)will mess it right up(don't solder use correct material connectors too), they also need a cold junction temp measurement where the thermocouple wires join the circuit board to be accurate but that should be on the circuit already, thats why I went for the digital sensors, they spit out a binary data string that can be converted to ascii and sent to the display, can go to .0625 degrees if you want real precision  , also fairly easy to have a string of them on the same signal wire as they are addressable by serial number, I have just 0V/5V/Signal wires to my engine bay with 5 sensors on them but for just 2 sensors I'd use 4 core and simplify the program.
NBAS--The communal colostomy bag of the boating community.
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IanM
United Kingdom
2238 Posts |
Posted - 25 Apr 2012 : 07:19:23
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Most cheap digital thermometer will use a thermistor rather than a thermocouple. If you get one where the sensor is on a flying lead they can be extended by a few metres without losing too much accuracy. Your biggest problem would be noise pick-up from the engine but they tend to use lots of smoothing and averaging, because temperature is a slow-changing value.
This is the kinda thing I mean:
www.ebay.co.uk/itm/New-Digital-LCD-Display-for-Refrigerator-Freezer-/160788460626
If you buy one, watch out for the temperature range in the specs. Many are aimed at aquariums and have a top temp of 70C. That one I've linked is 110C.
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df
United Kingdom
5994 Posts |
Posted - 25 Apr 2012 : 07:37:38
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I had one similar that only went to 50C, I found out when the thermostat packed up and cooked the fish, could smell it as soon as I walked in the door, can't beat a fish tank with fat on the surface.
Took 3 hours to cool enough to do anything with it, good fish soup though
NBAS--The communal colostomy bag of the boating community.
Visit leomagill.co.uk |
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Topic |
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Honda 15HP and lots of water
