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18 November 2008, 18:15
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#1
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Member
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 108
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Trim Gauge
Hi. I have recently finished installing power t&t on my 50hp. Brown band Mercury O/B. I have just added a trim gauge but the reading seems to be reversed. ie. when the engine is in the up position the needle points to the Down symbol, and vice versa. I have tried adjusting the sender unit, and putting it on the other way round but it makes no difference. Is there anything else I can do, or do I have to live with it. 
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18 November 2008, 18:17
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#2
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RIBnet supporter
Country: Other
Town: Principalite d'Chaos
Boat name: The Nashers Revenge!
Make: Ocean & Bombard
Length: 6m +
Engine: Suzi DT200EFI, DT9.9
MMSI: "Mmmmm SI" she said!
Join Date: Jan 2004
Posts: 3,623
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Try swapping the wires over on the back of the gauge.
Nasher
__________________
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Member of the ebay Blue RIB cover club.
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18 November 2008, 18:49
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#3
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Member
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 108
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Quote:
Originally Posted by Nasher
Try swapping the wires over on the back of the gauge.
Nasher
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I thought of that, but am a bit reluctant. in case it does any damage. There are Three connections on the gauge, live, earth, and send. I have the Brown wire with White trace connected to send, Purple to live, Black to earth. I am sure this is the right way round, so will it do any damage connecting any other way?
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18 November 2008, 18:54
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#4
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RIBnet supporter
Country: Other
Town: Principalite d'Chaos
Boat name: The Nashers Revenge!
Make: Ocean & Bombard
Length: 6m +
Engine: Suzi DT200EFI, DT9.9
MMSI: "Mmmmm SI" she said!
Join Date: Jan 2004
Posts: 3,623
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If it was me, I'd try swapping the +ve and -ve over, but its not me, and I wouldn't want to be held responsible for any damage 
Nasher.
__________________
RIBBED For extra pleasure.
Member of the ebay Blue RIB cover club.
Member of the Bombard 380 Aerotec club
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18 November 2008, 19:46
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#5
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Trade member
Country: UK - England
Town: Warwickshire
Boat name: True Blue
Make: Humber ocean pro 6.3
Length: 6m +
Engine: Mercury 150 opti
Join Date: Oct 2005
Posts: 426
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Sounds like you have the wrong sender unit fitted to the engine, I would check that one first 
__________________
RIB Sales- Powerboat sales Ltd 01327 264367 http://ribs4u.co.uk (supplier of humber & Valiant ribs)
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18 November 2008, 20:03
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#6
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Member
Country: UK - England
Town: Portsmouth, UK
Boat name: Jelly Fish
Make: Quicksilver 3.8XSHD
Length: 3m +
Engine: Mariner 25MEFI
MMSI: 235905473
Join Date: May 2008
Posts: 130
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Most senders are only a pot, + on one end, - on the other and sig out the middle. Swap the + and - and the signal will be reversed.
Have a look and maybe try that.
Swapping the + and - on the gauge is likely to cause the can of smoke that lives in all electronics to be let off!!!
__________________
Geoff
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18 November 2008, 21:06
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#7
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Member
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 1,900
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Sounds like you've got the wrong gauge. What make is it?
__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
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19 November 2008, 15:38
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#8
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Member
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 108
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Quote:
Originally Posted by Dirk Diggler
Sounds like you've got the wrong gauge. What make is it?
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The Gauge is Mercury Part No. 79-859693-A1. The sender unit is Quicksilver Part No. 821180A3. All Brand new stuff, well it was still in it's box.
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19 November 2008, 15:52
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#9
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Member
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 1,900
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Yeh, I reckon you've got the wrong gauge. The part # you have for the sender is for a 100 & 115hp, but specifically for a Sea Ray. These were a range of motors that were painted white, and I reckon they didn't have Merc instruments, probably Faria or similar. Of course, I could be talking utter Sh*te, but the sender info is correct!
__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
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19 November 2008, 16:17
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#10
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Member
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 1,900
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What side of the motor are you mounting it, coz the parts finder shows it on the port side.
__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
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