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Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3979
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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I have a 2001 Mercury Optimax 135 and recently took it in

Customer Question

I have a 2001 Mercury Optimax 135 and recently took it in for some repairs on the cooling system. The engine ran great except for the fact that I was getting 4 beeps every couple minutes. I checked the alarm codes and possible causes and they were water in the fuel and oil reservoir sensor. I disconnect the wiring from the fuel filter and still have the beeps. I then disconnected the two waters from the oil level sensor and still had the beeps. Do you know what else this could be?
JA: Sometimes things that you think will be really complicated end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Is there anything else important you think the Marine Mechanic should know?
Customer: Not at this time. Hoping this is something simple since the oil tank is full.
Submitted: 1 year ago.
Category: Boat
Expert:  Charles replied 1 year ago.

Hello, my name is***** will assist you.

Expert:  Charles replied 1 year ago.

The 4 beep alarm could also be a sensor out of range, or even low voltage on the engine. Do you also have the 4 light display?

Customer: replied 1 year ago.
No I don't have a 4 light display.
Expert:  Charles replied 1 year ago.

Ok, does the alarm stop as you advance the throttle any?

Customer: replied 1 year ago.
Alarm goes off in neutral and at different speeds while in gear. I would think it is not the oil reservoir sensor or the h20 sensor since the alarms continued with wires unplugged.
Expert:  Charles replied 1 year ago.

Are you near the engine now?

Customer: replied 1 year ago.
at home with engine on hose. Just started and alarms every two minutes
Expert:  Charles replied 1 year ago.

Ok, locate the TPS on the port side of the engine. It is where the throttle arm has a link to. Press in on the connector, see if the alarm changes.

Customer: replied 1 year ago.
Is this the plug by the linkage
Customer: replied 1 year ago.
I started and pressed in on TPS twice still getting beeps.
Expert:  Charles replied 1 year ago.

Ok, do you have a multimeter to test the voltage on the running engine at the starter solenoid.

Customer: replied 1 year ago.
Where is it located.
Customer: replied 1 year ago.
12.5 volts off 13.45 volts on
Customer: replied 1 year ago.
Motor starts perfectly don't see how this could be an issue.
Expert:  Charles replied 1 year ago.

On the phone currently.. be back with you shortly

Expert:  Charles replied 1 year ago.

Without a scanner, we need to eliminate items that normally go out.

Customer: replied 1 year ago.
Fixed it myself.
Expert:  Charles replied 1 year ago.

You found the fault?

Customer: replied 1 year ago.
Expert:  Charles replied 1 year ago.

May I inquire as to what it was?

Customer: replied 1 year ago.
For a refund.