Oil pressure and oil temperature gauges install on 17 KW Honeywell Generator

. I commissioned my 17 KW Honeywell in 2014. I never liked the fact that there were no instruments to monitor the 992 cc engine. No idiot lights, no gauges, NOTHING ! So I decided to install two gauges, oil pressure and oil temperature. The oil pressure gauge indicates off a line connected to the actual oil pressure where the OEM sending unit comes out of the engine block. The temperature gauge has a sending unit that uses 12 volts for its operation. I installed the oil temperature sending unit on the line that goes from the engine block to the oil cooler. I did a temperature test on the oil last week and the in fitting, (top) on the cooler was 194 F and the out fitting, (bottom) on the cooler was 130 F. I ran a fused (7.5 amp) line from the positive battery terminal to a normally open oil pressure sending unit installed in one of two brass street elbows I installed between the block and the OEM oil pressure sending unit. After the engine starts the sending unit closes the switch, completing the circuit and powers the out line. Ran the out line from the from the N.O. sending unit to the oil temperature gauge. From the terminal on that gauge I used the power to run the lights on both gauges and a green LED indicator light installed on the corner of the enclosure. Reminder to myself, LED’s are polarity sensitive. I can see that green light from both my deck at the back of the house and the side driveway. The LED indicator light is a fail-safe just incase both bulbs in the gauges burn out. Once the gauges were installed, during a5 minute test run, the oil temperature gauge read 180 F, the actual temperature as measured with a DLT at the inlet to the cooler was 194 F. As indicated in my earlier temperature takings on the OEM brass fitting (oil out from the the engine), the air flow over the fitting makes this location inaccurate for taking a temperature reading. So the sending unit is reading 15 degrees lower than the actual temperature of the oil entering the cooler. The ambient temperature was 70 F. I am satisfied with the look of the generator with the two gauges and LED indicator light installed. UPDATE on October 1, 2017 . . . . . . . . . . It was time for the 17’s monthly five minutes of fame doing its exercise. So I thought I would take some temperature and oil pressure readings on the newly installed oil temperature and pressure gauges. Exercise time is 1705 PDT, the cold engine temperature before the engine started was 41.0 F taken using a DLT pointed at the brass fitting where the oil exits the engine on the way to the oil cooler. This is the location of the oil temperature sending unit. After 5 minutes of running the oil temperature was 140 F and the oil pressure was 70 PSI. I re-started the engine and let it run for another 20 minutes. After 15 minutes of running the oil temperature was 179 F and the oil pressure was 70 PSI. After 25 minutes of running the oil temperature was 180 F and the oil pressure was 70 PSI. Does this engine require more that a 5 minute exercise even when the ambient temperature is 41 F, YES. Once we get some cold weather this winter I will do a manual start and do the 5, 15 & 25 tests. .