It will be a Mercruiser part, not Sea Ray. The existing one "might" have a part number on it. If you call your local Merc dealer they will probably know exactly what you mean and what you need.
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I have a feeling it's the pitot, and I've tried to clear it without success. I have not pulled the drive off ( I'm assuming you need to for complete access). I have taken a small screw driver as well as some wire to see if anything is lodged. Hasn't worked.Have you verified that you are getting a good, strong stream of water to the pitot sensor? You mentioned you blew through it, but there could be a leak in the hise somewhere.
Ollie.. do you have Smartcraft? Did you happen to read through this thread? There are multiple suggestions. There are also TONS of other threads about this. Most center around making sure the pathway is clear. Without Smartcraft, it's even easier... dirt simple system.
Thanks - I saw your pic of the sensor. I'm guessing its on the port side as well on a 5.0mpi?Go to the where the speedometer pressure sensor connects to the black plastic tube going to the outdrive. (Look at back of the engine just inside of the port riser. Disconnect the tube and using an air compressor blow air into the tube, it should exit out the pitot hole on the leading edge of the outdrive. If you are getting air through there, you aren't plugged up.
Off subject question. Looking to get a larger boat then my 185, and saw you have a 20'. How do you like it with the 4.3? Is there enough power with for skiing, etc? Lastly what pitch prop are you running? ThanksIs there an official name for it...I'm looking to buy a replacement and I can't find it listed anywhere. under sea ray pitot sensor