5.0mpi

B

Bretko23

New Member
May 9, 2018
24
Bridgeport, NY
Boat Info
225 weekender 2002
Engines
5.0 MPI Mercruiser
Hi all. 2002 5.0mpi is a little difficult starting at first and when first throttling up sputters and kicks for a short time then runs fine. After its warm starts and runs perfect seems to be on initial start up only. Treated fuel and checked fuel/water separator. Any guesses? Appreciate all advice I've been given so THANX...
 
scoflaw said:
Start with a tune up.
Click to expand...
OK...New issue. Tried to start motor. Turned over once then went completely dead. I have absolutely no electric from 2 fully charged batteries. I have power to lower unit but absolutely nothing any where else. Is there an in line fuse somewhere??? and thanks for reply on tune up...
 
Bad electrical connections could be your problem as well. Check your cannon plug and ground cables as well.
 
Bretko23 said:
Thanks...I thought so. Is there any other in line fuse that I should look for....
Click to expand...
seems odd since I've had running previously. Terminal connections are pristine and tight. Everything worked tuesday and it is as if someone flipped a switch and now I got nuthin.....any idea on what would cause main breaker to trip out of the blue??? Thanks for quick info
 
Probably the 90 amp fuse at the starter, lot of corrosion can happen there. Chase your problem with a DVM
 
scoflaw said:
Probably the 90 amp fuse at the starter, lot of corrosion can happen there. Chase your problem with a DVM
Click to expand...
replaced 90 amp fuse.....new one blew instantly when batteries turned on. I guess the next thing is to find out what is shorting out to blow that fuse all of a sudden. Nothing added or changed since last year....very perplexing. Thanks for you help
 
Probably the alternator, or the hot lead going to it from the fuse is chaffed. That's about the only 1 the 90 amp protects, the others are routed to the 50 amp breaker on top of the engine. Test those wires that connect to the 90 amp fuse individually for a grounded connection
 
Last edited:
scoflaw said:
Probably the alternator, or the hot lead going to it from the fuse is chaffed. That's about the only 1 the 90 amp protects, the others are routed to the 50 amp breaker on top of the engine. Test those wires that connect to the 90 amp fuse individually for a grounded connection
Click to expand...
will do.....thanx for pointing me in the right direction....for the record...electrical problems suck lol
 
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