Changed fuel filter and could not start engine

C

ChapMike

Cadet
Joined
Oct 26, 2012
Messages
16
2010 Chaparral 290 Cruiser
Twin 4.3L MPI
Bravo III

Did I do something wrong??? Was winterizing the boat this afternoon and ran into an issue. After I changed the fuel filter, the starboard engine started but died within a minute. Could not get the engine restarted.

Figured it was a fuel problem so I removed the fuel filter and discovered it was only 25% full. Manually poured gas into the filter and the engine restarted without hesitation. Did not have the same problem with the port engine.

What is the mechanism at work here? Do I have a weak fuel pump or am i getting some sort of vapor lock? Should I have done something different?

Thanks,

Mike
 
B

Brewman61

Ensign
Joined
Jun 10, 2010
Messages
996
Re: Changed fuel filter and could not start engine

Next time pre-fill the filter.
 
tpenfield

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
17,699
Re: Changed fuel filter and could not start engine

+1 on pre-filling the filter. that way there will be little air that has to get pumped through the system.

The port engine may have an easier time drawing from the fuel tank.
 
E

ENSIGN

Lieutenant Junior Grade
Joined
Jun 21, 2009
Messages
1,179
Re: Changed fuel filter and could not start engine

You filled the fuel system up with air,always prefill a new filter with gas.
 
tpenfield

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
17,699
Re: Changed fuel filter and could not start engine

I *think* that carburated engines are more forgiving of air in the fuel lines, whereas MPI engines are not so much.
 
EddiePetty

EddiePetty

Lieutenant Junior Grade
Joined
Aug 25, 2008
Messages
1,008
Re: Changed fuel filter and could not start engine

tpenfield said:
I *think* that carburated engines are more forgiving of air in the fuel lines, whereas MPI engines are not so much.
Click to expand...

Ding-Ding-Ding !!! We have a Winner!!! :)
 
You must log in or register to reply here.
Top