komodo_goods
Seaman Apprentice
- Joined
- Dec 31, 2023
- Messages
- 34
Hello,
I have been troubleshooting the oil gauge (P/N 73180), which is pegged at 80 psi, and am at my limit for troubleshooting, so I need assistance from the forum if anyone could. Below is what I have done to T/S thus far to troubleshoot.
1. This is the original condition when I bought the boat in July 2023. This is a 1998 Chapparal 232 with a Mercruiser MCM 5.7 2bbl. The gauge returns to ZERO with ignition off.
2. KOEO or engine running the oil gauge is pegged; a new sending unit was installed before I purchased it in July.
3. Removed the signal wire on the sender and jumped a good wire to signal on the gauge and the condition remains while installed on the boat.
4. Removed gauge from boat and bench tested with the oil sender (verified it is at 250ohm) and it still pegs at 80psi.
5. I ordered 3 different oil senders (2 cheap, 1 OEM) 250 Ohm senders, and the condition still exists while bench testing.
6. When air pressure is applied to the oil sender while being bench tested, the gauge responds and moves just a bit past 80psi.
I'm leaning toward the two solutions below.
1. Order a replacement (used) gauge (P/N 73180). I have done this tonight and will receive it next week.
2. Somehow this American-made 1998 boat has a European gauge/sender in it and needs the associated sender to work correctly with the gauge, which I cannot seem to find a part number for.
Is there anything else I'm missing that I need to troubleshoot?
Thank you in advance for any help or suggestions, as I'm at a loss on this one.
I have been troubleshooting the oil gauge (P/N 73180), which is pegged at 80 psi, and am at my limit for troubleshooting, so I need assistance from the forum if anyone could. Below is what I have done to T/S thus far to troubleshoot.
1. This is the original condition when I bought the boat in July 2023. This is a 1998 Chapparal 232 with a Mercruiser MCM 5.7 2bbl. The gauge returns to ZERO with ignition off.
2. KOEO or engine running the oil gauge is pegged; a new sending unit was installed before I purchased it in July.
3. Removed the signal wire on the sender and jumped a good wire to signal on the gauge and the condition remains while installed on the boat.
4. Removed gauge from boat and bench tested with the oil sender (verified it is at 250ohm) and it still pegs at 80psi.
5. I ordered 3 different oil senders (2 cheap, 1 OEM) 250 Ohm senders, and the condition still exists while bench testing.
6. When air pressure is applied to the oil sender while being bench tested, the gauge responds and moves just a bit past 80psi.
I'm leaning toward the two solutions below.
1. Order a replacement (used) gauge (P/N 73180). I have done this tonight and will receive it next week.
2. Somehow this American-made 1998 boat has a European gauge/sender in it and needs the associated sender to work correctly with the gauge, which I cannot seem to find a part number for.
Is there anything else I'm missing that I need to troubleshoot?
Thank you in advance for any help or suggestions, as I'm at a loss on this one.