6.2 mpi horizon alarm

[specktrout9]

I have a 6.2 mpi bravo horizon with bravo 3 outdrive new in '09
Had numerous problems...Was running home after a short run (3800rpm) and the alarm goes off. Pull the throtle back and the engine dies while the alarm still sounding. Tried to re-start engine and cranks slow and starts up...turn back off as alarm still sounding. Check temp gauge and it's running a little hot (185 deg.) Pull engine cover and ck all fluids...all ok...Re-start...cranks right up...notice oil pressure around 10-15 at idle (normally at 20). Notice the water temp goes down...check outdrive for debris (None) and bring boat up to plane...run back to inlet w/ no issues. (oil pressure at 38psi @4000rpm..)
Try and go fishing next day and alarm has intermitent beep (two beeps every min.)
All fluid levels fine...back to dock again...any thoughts???
Bob

 

[specktrout9]

Re: 6.2 mpi horizon alarm

Back down to boat this am...started engine, oil pressure 40psi when cool...drops to 15-18 after it warms up...alarm (2 beeps) still sounding. I also noticed when I turn the key to on it beeps one time (normal) followed by 2 beeps (Not Normal)...Anyone have any idea on diag...driving me crazy

 

[Don S]

Re: 6.2 mpi horizon alarm

There are numerous things that will cause an alarm on an MPI engine. Here is a list of the alarms and causes.

 

[specktrout9]

Re: 6.2 mpi horizon alarm

Thanks, I have not lost power except for the initial alarm...maybe it's an oil pump?? as the oil pressure does not register as it did prior my trip.