Looking at installing a low water pressure sender and idiot light. Have both raw water pump and circulating pump. Wondering how to go about doing this - looking for advice.

The idea here is to catch a water blockage problem immediately, rather than relying on the water temp gauge, which alters you to the problem well after it has started. I DO have a water pressure GAUGE now installed - even better than just the H2O temp gauge alone, but this idiot (me) needs an idiot light as well............. could not find a Gaffrig "Redline" water pressure gauge (with built-in idiot light).




thanks,

Mark

If you are like me and have through transom exhaust forget the buzzer, hook it to the horn,then you might hear it I have block water temp.raw water pressure,and exhaust water temp.only had one water related problem and the exhaust showed it first and caught it before motor even came up

Great idea.

I installed water pressure guages and low pressure switches on my transom with a hoses to the blocks. The low pressure switches are connected to Gaffrig idiot lights on the dash. It saved me once when I had a water hose come loose. The lights stay on at idle speed, but go out as soon as I get off of idle.

Where did you get the low pressure senders, and what are they set for (PSI)? How's it wired - always open circuit unless the water pressure is below the sender's switch point?

-mark

mark,

My sendors are open unless pressure is below 4 psi. Wired one side to ground and the other side to alarm light, other side of alarm light is wired to +12v.

I think they came from NAPA. Rex Marine has the sendors, they use them for low fuel pressure alarm.

randy

canada jeff,

I put a barb fitting in place of one of the block drains on the side of the block. I did it on both motors, but on different sides and both read about the same.

rbtnt