Moderated Discussion Areas
ContinuousWave: Whaler Performance
posted 08-26-2003 10:57 PM ET (US)
The 13 I just bought has a 96 johnson with power tilt and trim 40hp 2cyl but no tach. could someone tell me how I should wire and install one?
posted 08-27-2003 12:30 AM ET (US)
Assuming you have the side mount OMC control box - on the aft face of the box, under the key switch you should see a half-round 3 pin receptacle. The OMC tach wiring harness plugs in there. I just happen to have a new, unused, still in the package OMC tach with the OMC wiring harness. I bought it at from an OMC dealer in May 2003 for retail price of $135. I didn't use it because I decided on a (more expensive) System Check tech instead. I'll sell it for $100 delivered, if you are interested.
posted 08-27-2003 07:25 AM ET (US)
I will check it out today and if
i do I will buy it from you . what color is it? gvisko
|Over the LINE||
posted 08-27-2003 09:30 AM ET (US)
I don't want to mess up skookum's sale, but I bought a used tach from my OMC mechanic for $ 20.00. The wiring consists of plugging the unit in.
posted 08-27-2003 10:40 AM ET (US)
Overtheline - You are correct, used instrumentation is always cheap. Personally, I believe tach readings are important enough to justify a new unit. Also worth mentioning, I have experienced odd readings from a Teleflex tach when wired to an OMC - and at least two others on this forum have reported the same thing. Best to use an OMC tach with a OMC motor I think.
gvisko - black with red pointer, will e-mail photo if you like.
|Over the LINE||
posted 08-27-2003 11:03 AM ET (US)
Skookum, it was an OMC tach. You are right used can be a problem but since my OMC mechanic installed it (and I assumed he wanted to keep me as a customer) I figured it would work fine (and it did). I also had problems with an aftermarket tach on another OMC motor, so I would not go that way. Like I said before, not trying to screw up a sale just passing on my experience.
posted 08-27-2003 11:19 AM ET (US)
I have had problems with few tachs but I always run OEM. If not going OEM, get Gaffrig gauges, they are the best and sometimes not much more than OEM. I stay away from teleflex and Faria.
posted 08-27-2003 09:17 PM ET (US)
I dont see the plug on the side mount just a wire harness
which I will trace in the morning .I do see 3 wires
that are not connected and have caps on them. this motor
has system check installed . I will take your advise nick
and go oem if I can find out how to wire it myself
posted 08-28-2003 01:41 AM ET (US)
gvisko - If those capped wires are purple, gray and black - they will be your tach wires. In this case you don't need the harness, just the tach. OMC changed to a new wiring design in 1996. With System Check you have 3 options: use the OMC tach with System Check built in; use a normal tach with a seperate System Check Gauge (2" diameter I think); or use a normal tach with the OMC audible alarm. If you don't already have the 2" gauge then you probably have the audible alarm instead.
I have the color coded wiring diagram for 1997 40-50hp motors. It folds out too big for a scanner but could be scanned in sections or maybe digital photo if that would be helpful. I just updated my wiring from the pre-1995 OMC type to the current type so I have had some recent hands-on experience with this.
posted 08-28-2003 06:39 PM ET (US)
Thanks snookams I found the grey,purple.and black wire as yo
said just hanging there . I do have the 2" round system
check already installed . do I just hook up the new oem
tach to these wires?
thanks again george v
posted 08-28-2003 06:41 PM ET (US)
sorry for getting your name wrong skookum
posted 08-29-2003 10:48 AM ET (US)
Yes George or aftermarket if you chose. For OEm, try E-Bay.
posted 08-29-2003 12:52 PM ET (US)
Yep, real easy hookup. Black wire is ground, Purple wire is 12 volt (pos), and Gray is pulse. Set the dial on the back of the tach to "6".
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