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wisdom
United Kingdom
63 Posts |
 Posted - 09 Apr 2012 : 22:32:45
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I have an older type honda bf 75 which is only manual start and has a push button on the engine tray which when you press it brekas the circuit and the engine stops
I am looking to add an additional key operated switch near the helm so I could kill the engine should the need arise eg something round the prop
It would be easier than having to rush to the back and unclip the spash well cover to press the button
My idea is to get a maplins key switch and link it on the low tension side of the coil
The main question is would these switches do the job as I don't think its a big current. Any advise please sorry don't know how to add the link
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cliveshep
Thailand
1324 Posts |
Posted - 10 Apr 2012 : 05:59:06
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I thought the BF75 stop/kill switch GROUNDED the circuit not broke it?
Many outboard engine stop circuits do just that.
Current is minimal - it's the LT side of the ignition, do check that the stop is not "push to make"
Any key switch in those circumstances will do the job, except you might be turning "ON" instead of "OFF".
The other issue is the voltage drop might give you issues if the helm is a long way from the engine meaning a long length of cable but you could fit a remote button close to the motor well that would not entail dismantling to stop?
The cost of boating is insignificant compared to costs of a young wife and two teenage kids! |
Edited by - cliveshep on 10 Apr 2012 05:59:43 |
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df
United Kingdom
5994 Posts |
Posted - 10 Apr 2012 : 07:37:26
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I'm also sure the kill switch makes the contact to stop the motor, never worked on a honda outboard but that every other one has been, in which case voltage drop isn't an issue.
NBAS--The communal colostomy bag of the boating community.
Visit leomagill.co.uk |
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Knighty
United Kingdom
654 Posts |
Posted - 10 Apr 2012 : 14:40:05
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| My last outboard a Honda BF100 10hp had a thin twin core bell wire running from the outboard to the remote which had a push button on top. Pretty sure it grounded the circuit to cut the engine out,a push button might be better than a key if that was the case as it wouldn't add any extra security as the key switch would need to be off to run and on to kill the engine so the engine would still start without the key in. |
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df
United Kingdom
5994 Posts |
Posted - 10 Apr 2012 : 17:09:06
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I think you are supposed to have a remote engine stop if theres any sort of cover over the engine for bss regs, I would guess it's down to the examiners interpretation of how easy the access is.
NBAS--The communal colostomy bag of the boating community.
Visit leomagill.co.uk |
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wisdom
United Kingdom
63 Posts |
Posted - 10 Apr 2012 : 19:01:56
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Thanks to all for the replies as ever.
I was going to keep the existing stop switch its fitted outside the engine and may well ground when pressed. Its a bit of a pain when the canopy is down and therefore I wish to interrupt the coil feed with the key switch it would add a small amount of security. The primary use though would be to turn the engine off from the helm
So to add to the original question will it work by switching the coil feed off I tend. To think it will |
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df
United Kingdom
5994 Posts |
Posted - 10 Apr 2012 : 19:30:49
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Go to a bike breakers and buy a second hand ignition and key, most (especially older stuff)will short to ground when off and also switch power when on, probably cheaper than an outboard ignition, you'll get a better spark if you don't mess around with the coil supply.
With a bike switch you could have an engine off/domestic on/key out option by using the park light wires then switch back to all off when you leave the boat.
NBAS--The communal colostomy bag of the boating community.
Visit leomagill.co.uk |
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IanM
United Kingdom
2238 Posts |
Posted - 11 Apr 2012 : 14:31:27
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We had a Honda BF9.9, same era as yours I think, and that was definitely a "kill when made" switch.
And the time I learned that was the day I turned off the key and the engine carried on running. There was a loose connection in the wiring so the contact was not able to be made. I think it was Dave who pointed out that many motorbikes work the same way.
Why not just add a second kill switch in parallel with the existing one?
The problem with routing your LT cable out and back is that one day it will corrode/break/short/fail and then you won't be able to start the engine.
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Lester Mayo
United Kingdom
289 Posts |
Posted - 11 Apr 2012 : 15:28:49
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I have found carpet or builders bags normally stop the engine dead. This could be used as a emergency stop. 
Don't take life too serious, it's not permanent |
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adi-n-chez
United Kingdom
1980 Posts |
Posted - 11 Apr 2012 : 17:25:29
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As our BF15 had already had the tiller controls 'modified with scotchlocks'  I soldered into this removing said horrific connectors & extended up to the helm with 6 core (trailer) cable for start & stop buttons. I will eventually add an extra oil light with the spare two wires.
Adi
Sewer Tubes ? I'd rather have a D**ncr*ft (Only Kidding) |
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Peter Walker
United Kingdom
58 Posts |
Posted - 16 Apr 2012 : 14:57:29
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I use a Honda 15 and I extended the Start switch, Stop switch and Oil light to the console where they all work well.
I moved the existing kill switch and oil lights to the console and wired up with tinned cable and bullet connectors, I used a waterproof push to make for the start that I got from Maplin - (as used for vandal proof door bells). I protected the cables in the engine well with sleaving.
Norman 22 on the river Avon, Warwickshire |
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engine run\stop switch
