Alarm on Mercury 60 hp efi 06

[Landet]

I need help regarding af strange problem regarding my mercury engine, there are no problems i starting and sailing but after 10-15 sec in full speed the alarm sounds !! it keeps doing that until i pull the throttle a little bit back - stil sailing at max speed - then the alarm stops and everything is ok - then i give max throttle again and the alarm sounds again ?? there are lots of water coming out of the engine and the exhaust i ok. Do the engine have at alarm if the rpm gets to high ? or could it be the heat sensor ?

 

[jerryjerry05]

Re: Alarm on Mercury 60 hp efi 06

A steady alarm means it's running hot.How old is the impeller?It might be worn enough that at high speed it isn't pumping enough water(vanes in the impeller bent or wore out).J

 

[Landet]

Re: Alarm on Mercury 60 hp efi 06

Thank you Jerryjerry05 - the engine is from 2006 and have not been used in 2008 at all. do you have any idea to how i could check the impeller, is it possible to do so yourselves ? Should i try to clean the pipes with high pressure water ?

 

[jerryjerry05]

Re: Alarm on Mercury 60 hp efi 06

The only way to check the impeller is to remove the lower unit and disasemble the pump.Look on this site for R@R water pumps.
High pressure water won't do anything.J

 

[timeoff2fish]

Re: Alarm on Mercury 60 hp efi 06

I have an 2004 60HP four stroke Merc and the same thing happened; the water temperature guage was indicating temperatures all over the place. Replaced the water temp sensor and problem was fixed. I also noticed that the wiring harness contacts were corroded; you can try cleaning them also.

 

[Landet]

Re: Alarm on Mercury 60 hp efi 06

Thanks timeoff2fish, i will change the sensor and see what about the thermostat do you think i have to change that also ?

 

[Landet]

Re: Alarm on Mercury 60 hp efi 06

thanks Jerryjerry - i will try changing the sensor and thermostat and if it doesent work i will remove the lower unit - thanks again