Dual Instruments on a Houseboat

[jweidert]

What are the considerations when using a duplicate set of instruments on a houseboat with a fly bridge so that you get accurate instrument readings. The fuel tank has two sending units. How about Oil Pressure and Water Temp? The engine is a 4.3L V6 OMC with and I/O. Thanks, JW

 

[Dunaruna]

Re: Dual Instruments on a Houseboat

Another houseboatie , welcome aboard!!!!<br /><br />Good question, of which I don't have the answer (sorry).<br /><br />Just wanted to drop in and say hello.<br /><br />Aldo

 

[Silvertip]

Re: Dual Instruments on a Houseboat

The oil pressure and temperature gauges use sensors that are essentially variable resistors. Running two gauges from a single sensor will cause erroneous readings. For oil pressure, locate the current sensor, install a "T" fitting so you can install two sensors. Each sensor feeds a single gauge. Temperature sensors are located in the thermostat housing or block so the same principle applies. Use brass fittings (NPT) and make all additions as short as possible to avoid possible breakage of fittings from vibration. In the case of temperature sensors, there are often other plugs that can be removed and used for the second temp sensor. Be aware however, that its placement may result in a different reading than the other gauge.

 

[Boatin Bob]

Re: Dual Instruments on a Houseboat

Another option would be to put a double throw switch on the line so the signal only feeds the upper or lower helm depending on the switch. If your only worried about 2 signals (water and oil) you could do this with a single switch (DPDT)