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Crusader Model RH350 454cu Oil Pressure Sender

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biglar831

New member
Hello!

I am a little newer to boating and I am trying to replace the oil pressure sender on my motor. My boat is a 1985 SeaRay Sundancer 340 with twin 454 big blocks (Model is crusader 350)

The port side engine was replaced right before I bought it. It is a model RH350. The oil pressure has always ran high on that gauge and I was told it is most likely a bad sender. I went to replace it and it wasn't budging. It is attached to the motor with a right angle clip. When I was attempting to loosen it, the clip and whole assembly was bending. Is that normal? I figured I would stop and research some before breaking something. I was trying to remove it with a wrench right underneath the cylinder. I have attached photos.
 

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You need a second wrench to hold the block that the sender is screwed into while removing the sender
 
R_P said:
You need a second wrench to hold the block that the sender is screwed into while removing the sender
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Thank you so much! I thought it might be that simple, but a lot of senders I've seen while doing my research are screwed right into the block. When I saw this, it made me question everything! lol
 
Crusader ran a short hose from the oil port in the block to a t fitting so it could have an oil pressure sender and a second low pressure sender for alarm/light. Make sure you get the correct sender, they look the same but there is one sender for single gauge, and a different sender for dual stations
 
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