engine suddenly dies at cruising speed

I

intrepidvoyager

Petty Officer 1st Class
Joined
Mar 24, 2009
Messages
216
Have an odd situation .. .... boat has 1990 big block Mercruiser with new Bravo leg and half closed cooling system...boat will run great for hours then all of a sudden at cruising speed engine dies ...will not immediately restart, however if left 10 mins will restart and all is normal again ..... back at the dock coolant temp, voltage, oil pressure, 1/4 tank fuel ..all normal.......also same fuel used next day with no problem .. I am wondering if anybody else has experienced this odd situation?......or any ideas ....... this has occurred twice within 2 weeks.

Thanks.
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,525
Re: engine suddenly dies at cruising speed

boat will run great for hours then all of a sudden at cruising speed engine dies ...will not immediately restart, however if left 10 mins will restart
Click to expand...

Ayuh,.... During those 10 minutes,.... Is it lacking Fuel,..?? or Fire,..??
 
slasmith1

slasmith1

Lieutenant Junior Grade
Joined
Dec 2, 2008
Messages
1,028
Re: engine suddenly dies at cruising speed

check your tank vent first.
 
I

intrepidvoyager

Petty Officer 1st Class
Joined
Mar 24, 2009
Messages
216
Re: engine suddenly dies at cruising speed

Tank vent ...now that is a good possibility .....also will check fuel delivery although think we put a new fuel pump in that boat last summer ...I'll check anyway ...

Thanks guys !
 
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