Mark,
I decided to start a new thread as this was a little off topic on the coils thread. In response to your question about my delay relay wired into the temp and alarm circuit (30 second delay before arming the alarm circuit), I connected it before the alarm buzzer on the positive side.
To be more specific, my ignition/start switch is the standard Cole-Hersee 3 position key switch (Off-Ign-Momentary start). For the alarm circuit, I took my power source from the IGN terminal on the key switch to a single pole toggle switch located on the engine control panel (serves as an override off switch - more on this below), then to the delay relay, then to the alarm buzzer. The temp and oil pressure sensors make the ground connection to the buzzer when they are outside acceptable ranges.
I have an electric fuel pump that I also use to purge the air after changing the fuel filter. I put a fuel grade Y valve between the pump and the carb that I use to direct the fuel either to the carb or back to the tank. Directing it back to the tank and switching on the ignition (no start), I can pump fuel through the filter in a loop returning to the tank thereby purging it. It takes about a minute. The reason for the toggle switch mentioned above is to shut down the alarm during this operation. A side benefit of the valve is that I can shut off the fuel just ahead of the carb when closing up the boat.
Note that this delay relay only involves the temp/pressure alarm system.
I hope I addressed your inquiry.
Neil
77 Catalina 30
I decided to start a new thread as this was a little off topic on the coils thread. In response to your question about my delay relay wired into the temp and alarm circuit (30 second delay before arming the alarm circuit), I connected it before the alarm buzzer on the positive side.
To be more specific, my ignition/start switch is the standard Cole-Hersee 3 position key switch (Off-Ign-Momentary start). For the alarm circuit, I took my power source from the IGN terminal on the key switch to a single pole toggle switch located on the engine control panel (serves as an override off switch - more on this below), then to the delay relay, then to the alarm buzzer. The temp and oil pressure sensors make the ground connection to the buzzer when they are outside acceptable ranges.
I have an electric fuel pump that I also use to purge the air after changing the fuel filter. I put a fuel grade Y valve between the pump and the carb that I use to direct the fuel either to the carb or back to the tank. Directing it back to the tank and switching on the ignition (no start), I can pump fuel through the filter in a loop returning to the tank thereby purging it. It takes about a minute. The reason for the toggle switch mentioned above is to shut down the alarm during this operation. A side benefit of the valve is that I can shut off the fuel just ahead of the carb when closing up the boat.
Note that this delay relay only involves the temp/pressure alarm system.
I hope I addressed your inquiry.
Neil
77 Catalina 30
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