2.5 XRi warning system problem, maybe cooling problems.

Joined
Jul 3, 2001
Messages
67
I have a 1993 Mercury 2.5 XRi 200 HP on a 1993 Skeeter 200DX bass boat that has been giving me trouble. The warning system will start beeping after operating the engine from anywhere between 20 minutes and 1 hour. The system will slow the engine down to 1000 RPM's and usually after a short period of time the warning system will stop beeping and the engine will act as if nothing was wrong. The beep is a "beep-beep-beep" insteady of a steady tone. Sort of fast, like beeps a half second then silent for half a second.

I changed the waterpump but it still does the same thing. I found no unusual wear on the old waterpump or inside the housing, also I saw no blockages. I checked the fuel filter and found nothing out of the ordinary, no water or huge amounts of trash.

I was told that even though the engine had a good stream of water "peeing" that because it is a V-6 one of the thermostats could be functioning improperly, but because the "pee" hose is connected to both heads it would look like it was pumping water properly when in fact only one side was being cooled. Could this happen and cause the engine warning system to shut the engine down?

The same mechanic also said that it may be a poppett valve. I don't know... Any suggestions will be greatly appreciated. Anything that I may check or have checked...

Thanks, BK
 

4JawChuck

Chief Petty Officer
Joined
Aug 7, 2009
Messages
504
Re: 2.5 XRi warning system problem, maybe cooling problems.

Sounds like a low oil warning alarm or the water temp sensor, Check your harness/connections for shorts or opens and if everything is OK replace both sensors...they are not very reliable.
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,439
Re: 2.5 XRi warning system problem, maybe cooling problems.

Interminent "beeps" has ta do with oiling and/or water in tha fuel. Should be a small module with a small red LED light at tha base of tha ECU. Tha red light shoud indicate water. Sometimes it works and sometines it don't. You have a seperator filter on tha starboard side of tha efi plenum. Take it off and pour it in a glass ta check for water................
 
Joined
Jul 3, 2001
Messages
67
Re: 2.5 XRi warning system problem, maybe cooling problems.

Thanks for the suggestions and advice. I will check the sensors, connections and gas to see if there maybe water there. Thanks again, BK.
 
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