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15to17 posted 11-22-2003 11:08 AM ET (US)   Profile for 15to17   Send Email to 15to17  

Based largely on the advice of many members of this forum, I just completed a repower of my '86 Montauk with the Johnson 70 hp four-stroke (thanks particularly to JBCornwell and Bigshot for their enthusiasm for this setup). I am preparing to commence engine break-in, but before I do I have a question. My dealer managed to use the "old" controls for my old Johnson 90hp two-stroke, so the dealer used a wiring harness "converter" which evidently doesn't provide for use of the new "systems check" gague. I have been assured that the warning buzzer in the old controls will signal if there is either an oil or temperature problem (though the signal won't specify which problem there might be). My question is this, has anyone else gone this route (not using the new gagues with the oil/temperature warning systems) and are you satisfied with this set-up? Secondly, should I go back to the dealer and ask for a complete install of new controls with gagues, or should I not worry about it?

I'd appreciate any guidance members of this forum could give me.

raygun posted 11-22-2003 11:40 AM ET (US)     Profile for raygun  Send Email to raygun     
Your Dealer needs to look at his parts catalog more closely. There are many wiring adapters available and it can be confusing, but you CAN retain your old controls and still install a system check gauge (or system check tach).
I have an '86 Montauk as well. I replaced my '86 Evinrude 90 with a 2003 Johnson 90 2-stroke and retained my OMC controls. I can't say that I was very impressed with the installing dealer's utilization of the wiring harness converter however. I rewired the boat and removed YARDS of excess wiring, but the system check tach worked fine, before and after. Your dealer may not be up to speed on everything that is available for your application. I'd order a service manual for your new motor, you'll find a great set of wiring diagrams in the back that will help you to straighten out the wiring issues and install a system check gauge of your choice (there are many styles and faces) without much effort. Congrats on your new motor!
Sal DiMercurio posted 11-22-2003 11:51 AM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
You should also get the new binnacal [ shift & throttle control ] to go with the new tach, as they work together much better then the old style binnacal.
I'm not certain the old harness [ even with the converter ] works with the new tach to identify the exact alarm problem such as low oil, no oil, hot, or check engine.
My check engine alarm came on twice in 3 years, once for 1/4" of water in my internal fuel filter & once to tell me my number 4 coil wire was loose after I pulled it loose when putting the hood back on after changing plugs.
raygun posted 11-22-2003 12:20 PM ET (US)     Profile for raygun  Send Email to raygun     
My system check gauge works perfectly with the old wiring and binnacle mount control. It's all just a matter of is point A connected to point B, etc. A new Bombardier binnacle mount control runs about 400 bucks and I'm cheap so I wasn't about to change over since mine was in good shape.
Sal DiMercurio posted 11-22-2003 08:45 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
Thats exactly how much it [ binnacal ] costs,....$400
whalersman posted 11-23-2003 01:36 AM ET (US)     Profile for whalersman  Send Email to whalersman     

If your dealer did not install the newer wiring harness (and it sounds as though he didn't or you would have the wires there to connect up to the System Check Tach), then you have 2 choices...
1. Purchase the new wiring harness and replace your old one.
2. Wire your old one so it will work the System Check Tach.. (You would probably have to run a couple more wires from the engine and this might not be as easy as it sounds).

New engines DO NOT come with a Wiring Harness, Key Switch, Prop, Controls, etc..
You have to purchase these extra...

I would suggest having the new wiring harness and a new key switch to go along with it... Then purchase the System Check Tach....

The Binnacle Control doesn't have much in it unless you have the version with the key switch. I haven't tried this, but the newer key switch might fit in the older style Binnacle. The regular Binnacle control only has 3 wires connected to it for the Trim & Tilt switch and 2 wires for the Neutral Safety Switch.. This is really simple to connect to either the new or old system.. I see no reason why you couldn't use your original Binnacle Control along with the new wiring harness.

Did your dealer install a new wiring harness or use the original one that was in your boat?? I know you mention the converter, but I can't see where a converter would have enough wires at the console to run the System Check Tach unless they ran more wires through the tunnel from the engine...

Bigshot posted 11-24-2003 02:06 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I think the 70's come with a new wiring harness but double check. The controls are controls and have NOTHING to do with the wiring. The keyswitch, tach, etc are related. You can buy just the systems check guage on e-bay for cheap and you can also get the tach with it built in as well. Tach is like $150 but you can get them for under $75 on E-Bay or surplus store. Ask your dealer EXACTLY what he did and if your engine comes with wiring harness.
Bigshot posted 11-24-2003 02:08 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
PS, the buzzer is all you really need being the lights are hard to see in the daylight and are you glued to the tach while you are driving? The buzzer is what you need, the lights then show you what the problem is. Mine has only gone off once due to seaweed.

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