Continuous warning beep

caspari

Cadet
Joined
Mar 14, 2004
Messages
26
Have twin 135 mercs both run fine but one of them when I turn the key to run does the normal beep beep beep and then gose of. When I go to start and motor is running I get a continuous beep. This happens as soon as the motor is started, there is know way that it could be too hot yet. Help!
 

Trent

Captain
Joined
Nov 17, 2001
Messages
3,333
Re: Continuous warning beep

Beep...Beep...Beep is oil warning. If you have a solid beep or tone unplug the heat sensor in the head and re-check.
 

KCLOST

Commander
Joined
Jun 22, 2002
Messages
2,095
Re: Continuous warning beep

Check to make sure that the wire from the temp. sensor (if you have one) and the overheat sensor is not grounded to the head somewhere. If it is (insulation on the wire worn) this will cause the horn to sound...
 

dilligafda

Petty Officer 1st Class
Joined
May 13, 2003
Messages
315
Re: Continuous warning beep

Originally posted by caspari:<br />When I go to start and motor is running I get a continuous beep. This happens as soon as the motor is started, there is know way that it could be too hot yet. Help!
It's not too hot. THe alarm you are hearing is a caused by a sensor in the block to detect rotation of the oil pump. If it is going off, there are a couple of things causing it. Either the oil pump isn't turning (BAD thing) or there is not enough voltage from the switchbox to the warning module. <br /><br />Easy check for the oil pump is to remove the pump, disconnect the ignition and crank the engine over with your finger holding the oil pump coulper in. If that checks out, then move the green wire from the warning module to a different post on the switchbox. If the alarm stops, leave it there. If it doesn't, you may have a problem with the stator or switchbox. <br /><br />Good luck and keep us posted!
 

KCLOST

Commander
Joined
Jun 22, 2002
Messages
2,095
Re: Continuous warning beep

dilligaf, he's getting a continuous beep not the beep,beep,beep, associated with the oil pump....
 

dilligafda

Petty Officer 1st Class
Joined
May 13, 2003
Messages
315
Re: Continuous warning beep

OK sorry, my bad :rolleyes: meant to post to a different message by same author.
 
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