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Old 15-08-2008, 07:22 PM   #1
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power trim wiring

got new rams and pump 1991 merc v6 old unit 3wire new unit 2wire any one now how to wire
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Old 15-08-2008, 08:03 PM   #2
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Sounds a head ache with the solonoids changing etc
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Old 15-08-2008, 08:36 PM   #3
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Prob earth the body and switch either wire for different direction?
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Old 15-08-2008, 09:06 PM   #4
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... 2 wires trim-con sometimes needs 2 relais for changing the poles
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Old 19-08-2008, 04:48 PM   #5
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if your new pump doesnt have solonoids then reasonably simple to reverse a 12v or 24v motor, using mometary on---off----mometary on available here
http://www.mudstuff.co.uk/Carlingswitches.html

hope this helps

Ian
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Old 19-08-2008, 04:53 PM   #6
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Prob as Scottyboy says earth body, and remember Blue sky (up) and green grass (down)

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Old 19-08-2008, 05:40 PM   #7
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probobly should have mentioned
A DPDT switch can be wired up as a reversing switch for a motor as shown in the diagram.

ON-OFF-ON
DPDT Centre Off
It has a third switching position in the centre which is off. This can be very useful for motor control because you have forward, off and reverse positions. Momentary (ON)-OFF-(ON) versions are also available where the switch returns to the central off position when released

this is what i used for my flip up bolster seat pumps ...works a treat ...saves having to wire relays.


good luck

Ian
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Old 19-08-2008, 05:46 PM   #8
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Quote:
Originally Posted by iandl View Post
probobly should have mentioned
A DPDT switch can be wired up as a reversing switch for a motor as shown in the diagram.

...works a treat ...saves having to wire relays.


good luck

Ian
You'll need a bit more than luck if you go that route, a Carling switch wouldn't handle the load without relays or solenoids!
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Old 19-08-2008, 05:50 PM   #9
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Quote:
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You'll need a bit more than luck if you go that route, a Carling switch wouldn't handle the load without relays or solenoids!
apologies Tony ...just trying to help ...wasnt aware of the amps required ....the carling switches in the link are good upto 20amp which was fine for my application

i'll keep my nib out in future


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Old 19-08-2008, 05:53 PM   #10
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No problem, I like a good fire!!!!

I've been using carling switches on my boats since I started in 95, and they really are excellent.
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Old 20-08-2008, 10:44 AM   #11
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Quote:
Originally Posted by iandl View Post
probobly should have mentioned
A DPDT switch can be wired up as a reversing switch for a motor as shown in the diagram.

ON-OFF-ON
DPDT Centre Off
It has a third switching position in the centre which is off. This can be very useful for motor control because you have forward, off and reverse positions. Momentary (ON)-OFF-(ON) versions are also available where the switch returns to the central off position when released

this is what i used for my flip up bolster seat pumps ...works a treat ...saves having to wire relays.


good luck

Ian



DAC wire up the standard mercury lift pump for the F1 12" leg in exactly that manner, as it only runs for a few seconds at a time it is ok, I wouldn't recommend it for trimming a standard leg though, if you tilt the engine it would probably catch fire as Tony says.
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