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Merc 115HP 2005 ELPTO Two stroke Low Oil Alarm issue Serial No. 1B023978 Trying to determine which item is bad. Low oil sensor, Powerhead Temp/Engine Overheat sensor, Warning Alarm Module or ???
Originally the alarm horn did not work and I accidently ran the SilverQuick oil out - engine stopped, I refilled reservoir and all is OK except the alarm horn near the starter key did not buzz intermittent or steady alarm. Troubleshot the alarm horn and it in very dead. so I Bought an off brand 12V Alarm with Light and replace the it (Purple and tan/blue wires near starter key).
Now the horn stays "on" Steady as soon as key is turned to on. Merc Service Manual for this engine, page 3C-16 has a Troubleshooting Chart. Went through the "Steady - always On" horn area and it is not making any sense. Here's why: It says to disconnect Engine overheat sensor BLACK wire and try again. It is a tan/blue wire, not black. Disconnected tan/blue, still Steady ON horn. I have the Warning Module unbolted from engine (Module P/N 821889) it has three wires of four in use, black, red, tan connected to wiring harness, black, red, tan. Also a black/yellow wire that it not used.
QUESTION: is it possible to check the operation of this warning module?
QUESTION: What if anything do you recommend -- need some advice? Next wire checks?
Also - I have not checked the blue wires on low oil float because they are very hard to get to without removing the oil reservoir.
Richard51 716-830-5151 rcadille@kistler.com
Originally the alarm horn did not work and I accidently ran the SilverQuick oil out - engine stopped, I refilled reservoir and all is OK except the alarm horn near the starter key did not buzz intermittent or steady alarm. Troubleshot the alarm horn and it in very dead. so I Bought an off brand 12V Alarm with Light and replace the it (Purple and tan/blue wires near starter key).
Now the horn stays "on" Steady as soon as key is turned to on. Merc Service Manual for this engine, page 3C-16 has a Troubleshooting Chart. Went through the "Steady - always On" horn area and it is not making any sense. Here's why: It says to disconnect Engine overheat sensor BLACK wire and try again. It is a tan/blue wire, not black. Disconnected tan/blue, still Steady ON horn. I have the Warning Module unbolted from engine (Module P/N 821889) it has three wires of four in use, black, red, tan connected to wiring harness, black, red, tan. Also a black/yellow wire that it not used.
QUESTION: is it possible to check the operation of this warning module?
QUESTION: What if anything do you recommend -- need some advice? Next wire checks?
Also - I have not checked the blue wires on low oil float because they are very hard to get to without removing the oil reservoir.
Richard51 716-830-5151 rcadille@kistler.com
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