engine problems

[pistonbroke]

Hi to you all.I am after a bit of advice,Took the boat boat out yesterday and after a while a bleep started and it would bleep four times every two minutes, I checked the water was coming out keeping it cool,checked fuel but it kept bleeping every two minutes.I got back to the pontoon turn the engine off then turn the key into the start mode and after two minutes it bleeped again even without the engine running does anyone know the problem here.Its a mercury 150 optimax 2005 any answers would be grately appreciated.Many thanks

[NICK R]

The alarm module is somewhat limited in its ability to pass information to the owner. It only has an aural signal. It modulates the cadence of the aural signal to indicate the function. There are only three possible cadences.

When the key is turned from OFF to ON, the alarm sounds a signal to verify that it is operating properly. This signal sounds like a Morse code letter D or B, i.e., "dah-didit" or "dah-dididit". If the module does not sound this signal it is malfunctioning.

After engine start, the alarm goes silent until there is an alarm condition.

If the engine temperature rises above the threshold of the thermal switch in the cylinder head, the switch closes. This causes a continuous tone alarm which persists until the temperature falls enough for the switch to open. This ends the alarm tone.

Any of the following conditions will signal a BEEP-BEEP-BEEP:

--oil level below the float switch level in the under-cowling reservoir

--input gear shaft to mixing pump turning too slow in relation to engine speed

There is no way to tell which of these events causes an alarm. You have to deduce which is the problem by inspecting the motor.

It is also possible that any of the following conditions will also signal a BEEP-BEEP-BEEP:

--defective float switch in the under cowling reservoir

--defective motion sensor in the mixing pump

--defective ignition module sending false signal

--defective alarm module creating false signal

If you want to diagnose this problem further, you will need to obtain the service manual for you engine. Thoroughly read the service manual. It will cover the oiling system and alarm system in detail. There are many complex interactions which can cause these alarms.

[pistonbroke]

Thanks Nick R but would all these faults still activate the four beeps even when the engine is not running

[captain chaos]

i would check most likely...oil level, if you havent already?

[pistonbroke]

thanks captain chaos,
I was down there at the weekend and checked oil levels drained off some fuel and that seemed ok so I put it in the hands of them who knows best and they apparently put a diagnostic test on it and hey presto found to be water in the fuel so a new filter fitted and its ready for fishing again.if I can afford to go out after ive paid their bill lol

[captain chaos]

Fantastic....normally something simple, but when the season's slipping away its easy to get into panic mode,shouldn,t really be a big bill
Just had a full service and new impeller, stat etc came out at £250.that was on top of diagnosing an electrical fault which i should have found( DOH!)
Tight Lines.Jason