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Author Topic:   Electrical Wiring Details on 170 MONTAUK
IRISHAYES posted 04-08-2004 04:18 PM ET (US)   Profile for IRISHAYES  
I just picked up my 2004 170 Montauk. Where does one connect the wires for an hour meter? What is the purpose of the short purple wire with the connectors on both ends in the bundle? Thanks in advance for your help.
Barney posted 04-08-2004 04:30 PM ET (US)     Profile for Barney  Send Email to Barney     
I went to the purple wire on the gauges. The little wire, I don't know. Jim
LHG posted 04-08-2004 05:32 PM ET (US)     Profile for LHG    
The hour meter is extremely easy to hook up, just two wires to the tach, or other nearby gauge. The purple is Mercury's color for the ignition lead/post, black for the negative.

The hours meter runs when the igniton key is "on", but engine doesn't necessarily have to be running.

Maximus posted 04-08-2004 05:37 PM ET (US)     Profile for Maximus  Send Email to Maximus     
I simply pulled current from the the gauge lights. You will notice that the gauges are lit when the key is ON. I made a small pigtail and secured the hour meter underneath the console, tie-wrapped to the back side of the gauges. I used a Teleflex gauge which I bought at Boater's World for $20. West Marine charged $40 for the same gauge.

I didn't want to cut a hole in the dash or cut into the factory wiring. Hour meters can be both beneficial and detrimental to resale value.

One note of caution: Do not leave the key on the ON position without the engine running or you will crank away hours.

Barney posted 04-08-2004 05:49 PM ET (US)     Profile for Barney  Send Email to Barney     
Perhaps I wasn't too clear on your question "and what is the short purple wire with the connectors on both ends in the bundle for". Nothing as far as I can tell. Jim
IRISHAYES posted 04-08-2004 09:07 PM ET (US)     Profile for IRISHAYES    
Thanks for all your help, I'll let you know how I made out
jimh posted 04-09-2004 01:25 AM ET (US)     Profile for jimh  Send Email to jimh     
For some comments about WHERE to install an Hour Meter, see this previous discussion in the archives:

Installing hour meter on New 170 Montauk

The proper electrical wiring of an hour meter often depends on the engine and the particular installation. As alluded to above, just wiring the hour meter to respond to the ignition key circuit can result in many false hours of operation being logged. An alternative method can be used to operate the hour meter if you have a 4-stroke engine which has circulating oil. A pressure switch can be installed on the engine to detect oil pressure--in fact there may already be one as part of an alarm circuit. If the switch provides a contact closure when oil pressure is present, you can wire the hour meter to operate from this switch. Thus your hour meter only records hours when the engine is actually operating, that is, when it has oil pressure.

A circuit like that could also be adapted to a 2-stroke engine if you could find a switch that could respond to water pressure. You could control engine hours to correspond to the water pressure being present. I don't know if anyone has actually done that.

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