Ongaro Tach wiring

Curt,
The 4 wires are for different cylinder engines. IE: 4,6 or 8 cylinder. The fourth wire should be a common. Most likely a ground and the white wire. I don't know which is which for the other 3. Connect them up one at a time and see which one seem to be the correct RPM for the given number of cylinders.

Are you sure it's a Ongaro? I've never heard of it! Maybe someone swapped it out at one time? Typically CC would have used a Teleflex.

What do they look like Zach, I don't think I have ever seen them.I remember mine being Teleflex and I was able to get some Teleflex's that are very close, and found exact nos tach and speedo.

The call out panel was missing off that tach but it's supposed to say Ongaro.

The mustang dash from ebay had the exact same tach and the gauges in the 68 stang vs the 68 skylark are identical other than the gauges in the mustang having orange needles and the skylark having white. I found some NOS orange needle gauges which will be going in the skylark as well as the mustang (if that ever hits the water).

I just googled Orgaro. Interesting that it's actually the name of an instrument designer who worked for Teleflex at one time. He did have his own line of gauges and most went into small diesel auxiliaries and Atomic 4 applications (sail). The panels evidently also made it into some CC's. Remember CC would put amost anything in their boats they could get their hands on! It's also interesting I found a couple pictures of the same panel that Zach posted but they had Teleflex tachs in them!!

Curt,
Al is correct that the wiring diagram is in the Interceptor manual. I took a look at it and found that I was wrong about the use of the different wires for different number of cylinders. (some tachs do use the multi wire connection) Your tach as well as the other instruments utilizes a voltage regulator. It was common in the early days of electric gauges. My 64 X with the Stewart Warner gauges uses one as well. The regulator smooths out the voltage so the gauges are more accurate at different system voltages. Hopefully you still have the regulator.

Curt,
I know the wiring diagram isn't the easiest to read. Do follow it and do use the voltage regulator.

Sweet Marty!

Pete, I remember all of the Ongaro tachs have written on the housing what they were calibrated for. IE 4-6-8.

Those gauges weren't labeled at all right Gary? I just assumed Ongaro made it on them.

Gary S wrote: were Ongaro the others look to be SW?

Except for Marty's water temp gauge! Marty, you had better go looking for a SW. Go original!

8122pbrainard wrote: Gary S wrote: were Ongaro the others look to be SW? Except for Marty's water temp gauge! Marty, you had better go looking for a SW. Go original!

Pete-- gauges were like that when we got the boat in 1970. We don't know if the factory just threw those in there because that was all they had - or if the previous owner changed any of them. Yes all 3 are different.. But they all work!
Pete-- Don't know if you know the Story on the Skylark- But at the 2010 SJRR Mini- Ralph told me the Birth of my 66 Skylark.

He said it was going down the line as a Mustang. MWCC called them and said they needed a Skylark for the Chicago Boat Show in October 1965. They changed the orders on the Mustang before the helm was cut out to a Skylark. The boat was finished and sent to the Chicago Boat Show. There it was sold to a gentleman who also traded his 1953 Chevy in on it.   The kicker-- The Hull ID # M 1672 is still on the Skylark.. They forgot to change it out ! Engine serial # matches on Bill Of Sale.






""Marty, did you get the cooling system sorted? ""

Zach- Yes the Ford 143'F stat worked out.. No other problems were found . Just my imagination like TimB said...

Pete- here's a Mock-Up of the Dash Panel going in when Allen ( HatterBee ) and I " re-wire " the Skylark..