I have one opening on my dash, which should I install? which is easier?

Thank You

Oil temp is more important, IMO, between those two.

Atleast if the water pressure starts dieing off you can tell by the exhaust getting louder due to less/no water...theres nothing to tell you the oil temp may be too hot other than really low oil pressure.

Oil temp is more likely to cause you trouble than water pressure my.02

Is there already a location for the sensor on a stock 502 mag mark 5 carbureted boat?

I can't remember which company. But I think it is Livorsi has a gauge with oil and water in the same dial. If I see it again I will let you know.

Thats funny because I would say water pressure. If the oil starts to get hot its usually from a blocked cooler.

Wannabe

Water press would be easier to install, just need a water line from intake to back of gauge

Oil temp transducer should be mounted in the pan. We usually have our fabricator TIG in a NPT bung when we build up our engines.

Also, I like the oil temp as it lets you know when you can get in the throttle.