4.3l oil sensor

[20pilot]

I am having a problem with my oil sender on my 4.3l mercruiser with thunderbolt ignition. I am having a continuous alarm, so I check all of the sensors. I pulled the wires from each one and finally on the oil sender the alarm went off. I replaced it with a sierra 18-5899. The sensor is much bigger than the original that I removed but told it would work. After hooking it back up I am still getting an alarm. Any ideas?

 

[Don S]

Re: 4.3l oil sensor

There are oil pressure senders for gauges, and oil pressure switches for alarms and a different one for electric fuel pump control.

That 18-5899 is a gauge sender, not an alarm switch.

What's the serial number of your engine? 4.3 Thunderbolt ignition covers over 25 years worth of 4.3's and are not all the same.

 

[20pilot]

Re: 4.3l oil sensor

There are oil pressure senders for gauges, and oil pressure switches for alarms and a different one for electric fuel pump control.

That 18-5899 is a gauge sender, not an alarm switch.

What's the serial number of your engine? 4.3 Thunderbolt ignition covers over 25 years worth of 4.3's and are not all the same.

Serial# 0L011240

Thanks for the help!

 

[20pilot]

Re: 4.3l oil sensor

any ideas?

 

[20pilot]

Re: 4.3l oil sensor

Does anyone know the part number to the oil pressure switch?

 

[Don S]

Re: 4.3l oil sensor

Here are the OEM part numbers.