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Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3382
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: 6 months ago.
Category: Boat
Expert:  Charles replied 6 months ago.

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

Expert:  Charles replied 6 months 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 6 months ago.
No I don't have a 4 light display.
Expert:  Charles replied 6 months ago.

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

Customer: replied 6 months 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 6 months ago.

Are you near the engine now?

Customer: replied 6 months ago.
at home with engine on hose. Just started and alarms every two minutes
Expert:  Charles replied 6 months 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 6 months ago.
Is this the plug by the linkage
Customer: replied 6 months ago.
I started and pressed in on TPS twice still getting beeps.
Expert:  Charles replied 6 months ago.

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

Customer: replied 6 months ago.
Where is it located.
Customer: replied 6 months ago.
12.5 volts off 13.45 volts on
Customer: replied 6 months ago.
Motor starts perfectly don't see how this could be an issue.
Expert:  Charles replied 6 months ago.

On the phone currently.. be back with you shortly

Expert:  Charles replied 6 months ago.

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

Customer: replied 6 months ago.
Fixed it myself.
Expert:  Charles replied 6 months ago.

You found the fault?

Customer: replied 6 months ago.
Expert:  Charles replied 6 months ago.

May I inquire as to what it was?

Customer: replied 6 months ago.
For a refund.

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