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Old 10-28-2015, 08:56 PM
bdiesel bdiesel is offline
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MCX fuel injector

I started smelling gas coming from the engine compartment & found 2 injectors that had the rubber inserts popped out. I tried to reseat them, but didn't have any luck. Has anybody else had this happen before?




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  #2  
Old 10-29-2015, 06:41 AM
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Cant say that I've ever heard of this issue.
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Old 10-29-2015, 12:40 PM
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Usually that only happens if they are not re-seated correctly. Check the O rings and replace if necessary.
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Old 10-29-2015, 01:17 PM
bdiesel bdiesel is offline
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I've got 2 injectors doing this (cyl1 & cyl5). The boat only has 88 hrs on and it and being an 03, do you think the o rings could have deteriorated causing this? I bought the boat this summer and put 1/4 of the hours on it since I've had it. It's spent most of its life in storage.
Is there a place I can buy o ring kits for replacement?
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Old 10-29-2015, 01:39 PM
EricB EricB is offline
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If fuel is leaking from the wire connector, the injector itself is failed and leaking. Fuel is pushing past the terminals on the injector itself. Those wire seals are not to seal against fuel leakage, they are environmental seals for the wires and connections to protect from dirt, moisture and vibration.
The leaking injectors themselves need to be replaced.
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Old 10-29-2015, 01:39 PM
bdiesel bdiesel is offline
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I should have put this in the first post, but it's leaking out of the electrical connector, not from the fuel rail. I've never seen anything like this before either. I'm thinking internal leak in the injector itself?
It straight scared the sh!@ out of me when I found it!
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Old 10-29-2015, 02:39 PM
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Hard to tell from the pic, but it's toast if leaking from the wires. You may be able to get a local shop to rebuild them, if not they can be found used on car forums for cheap.
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Old 10-29-2015, 03:36 PM
bdiesel bdiesel is offline
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Thanks for your help Shaun. Do you how I could find out the part number for the injector? I found a part number from another thread, but it was for a 2010 MCX.
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Old 10-29-2015, 04:39 PM
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I do not have the PNs for the MPI. LT1 used 22-24lbs injectors and yours should be the same. Did a quick search and only found the MC replacements which were 200+ each. I would pull them all and find an EFI shop it town to rebuild or replace if necessary. They can tell you exactly what you have and offer replacement options if necessary.
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Old 10-29-2015, 08:32 PM
bdiesel bdiesel is offline
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Unfortunately, I don't live in an area with an EFI shop available.
I've been searching myself and this is the lowest price I could find http://www.marinepartssource.com/new...&mfgno=S556049
I was hoping somebody has had to replace one before & found a cheaper replacement.


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