mercury overheating i think

[rwchop]

i have a mercury 1987 150 xr4 i put a new impeller and gaskests in lower end and new thermostats at full speed have over 15 psi and 5 to 7 at ideal temp gauge sits in 1/2 to 3/4 on temp gauge only has a c and h now when you start boat i have a beeeeeeeeeee that doesnt stop going off was a hole in a line on back of motor coming out of thermostats so i got new hose and will be putting that on soon could that be problem tryed running motor with no thermostats have water comming out and with thermostats and water comming out pee hole

 

[Maxz695]

Re: mercury overheating i think

beeeeeeeeeeeeeeee LIKE ALARM? SOUND NOISE ETC this oil linjected? I read something about mercury,s leaking oil when tilted possibly this could be the oil warning sensor? BEEEEEEEEEEEEE fill your oil resivor with oil again this may stop the noise if i,m correct in what your writing

 

[rwchop]

Re: mercury overheating i think

yes alarm but alot of people on here say oil sensor is a bep bep bep not a steady beeeeeeeeeee and oil full and motor is trimed all the way down and yes oil injected

 

[Maxz695]

Re: mercury overheating i think

please go red this post in the mercury section i,m not firmiliar but if it is the warning sensor there is a post way down that may help you -----> Marinar 135hp 90 Beeping and wont full throttle HELP pls

 

[Maxz695]

Re: mercury overheating i think

contact member (Poster) scheffer he wrote on that post he may know what to do

 

[rwchop]

Re: mercury overheating i think

my speed is great about 52 mph thats gps no hesitations but now beeeeeeeeeeeeeeeeee going off

 

[rwchop]

Re: mercury overheating i think

i worked on boat today and noticed when you turn key it beeeeeeee the whole time even when not runnig

 

[Maxz695]

Re: mercury overheating i think

agaun the low oil warning sensor is going off telling you you are low on oil FILL THE OIL TANK TO FULL OR THIS WILL NOT STOP. once the sensor detects low oil it will not stop until it does detect oil the only way to get it to detect oil is to totaly fill the tank to the top and the sensor in the cao will then detect oil and it should stop at that point

 

[rwchop]

Re: mercury overheating i think

i thought oil was a bep bep bep not a stedy beeeeeeeeeeeeeee

 

[aussieflash]

Re: mercury overheating i think

G'day Chop,I'm thinking max missed your post where it said OIL FULL lol.Still wiping tears away.Anyway the constant beeeeeeep is overheat and the intermittent beep...beep...beep is oil warning.If overheat horn is happening with key on and engine off and cold, I would be checking the sensor.they always play up.

 

[will941s]

Re: mercury overheating i think

I had a yamaha that did the same thing. From my experience with it Mercury, Yamaha, Johnson all have the same type of system. A switch on the head that when closed or opened (forget the position that makes it beep) sends a signal to the alarm making it beeeeeeeeeeeeep. My guage always read cool, but the alarm said other wise. So I changed out the switch on the head and problem was solved, I forgot how I tested them to see which one was bad.....it was really simple though.

 

[rwchop]

Re: mercury overheating i think

I disconnected the sensors completely and beeeee still going on

 

[Maxz695]

Re: mercury overheating i think

my bad lol

 

[j_martin]

Re: mercury overheating i think

Sheesh.........

The alarm circuit is comprised of an alert noisemaker or light connected to key switch power, and to a wire that goes to a terminal on the starboard side of the engine just above the switchboxes. On that terminal are 3 wires. One to the alarm, one to the overheat sensor, and one to the oil alert.

Take off the wires to the overheat sensor and the oil alarm and turn on the key.
>>> still noise, there's a short to ground in that wire to the alarm.
else
connect the other wires back one at a time. The one that sounds the alarm goes to the defective part.

Hope it helps
John

 

[aussieflash]

Re: mercury overheating i think

Hi Chop,If you have disconnected your overheat sensor and it still beeps when key is on,then you have a faulty warning module...replace module.

 

[rwchop]

Re: mercury overheating i think

which module the buzzer by key switch or sensors

 

[j_martin]

Re: mercury overheating i think

Disconnect at the terminal strip I told you about. If the oil module and the temp sensor are both disconnected and it still beeps, the wiring is shorted.

 

[aussieflash]

Re: mercury overheating i think

Warning module at motor.I have 1988 v6 and my manual also features the xr4 150.so I figure this info is good.
Good luck.Paul.

 

[Maxz695]

Re: mercury overheating i think

Good luck, I really hope you get it fixed by tommorrow so you have a great weekend out on that thing.

 

[rwchop]

Re: mercury overheating i think

so temp sensor on motor because i didnt see warning modual on my motor i got buzzer by key and temp sensors