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Jeff G.
Jeff G., Marine Mechanic
Category: Boat
Satisfied Customers: 4717
Experience:  42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance
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I have a 2004 225 4 stroke outboard recently serviced. Oil

Customer Question

I have a 2004 225 4 stroke outboard recently serviced. Oil is full gas is new and it's charging fine. When I put the key in and turn on it immediately starts a continuous alarm that remains after starting and while running what are causes
Submitted: 11 months ago.
Category: Boat
Expert:  Jeff G. replied 11 months ago.

Do you have the gauge with the warning lights? Which lights are on?

Customer: replied 11 months ago.
It has standard green and 2 reds. Seem normal
Expert:  Jeff G. replied 11 months ago.

So after the diagnostics all lights go off? But the buzzer stays on?

Customer: replied 11 months ago.
Expert:  Jeff G. replied 11 months ago.

That should be low oil pressure. Since the buzzer really never turns off I suspect a faulty sender.

#18 is the oil pressure sender. Disconnect it and see if the buzzer stops with the key ON engine OFF. If so replace the sender.

Customer: replied 11 months ago.
Ok. Is that 18 in the fuse box or where do I find Thanks. Have to do latrr now
Customer: replied 11 months ago.
can I use it?
Expert:  Jeff G. replied 11 months ago.

Look at the attached picture of the block. #18 in the drawing. Not the fuse box.

I would definitely NOT use the engine with the alarm going off. We have no way of knowing if the engine actually has the required oil pressure, or another problem. Before using the engine we need to determine exactly what is happening and that we do have good oil pressure.

If it is just the sender then a simple replacement will do.

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