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01-26-2014, 12:39 AM #1
5000 RPM
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?? fitting on side of 2.5 260 horn w/hose to regulator
Have my engine apart for rebuild. Today I found that the "barb fitting" on the side of 2.5 260 horn w/hose that goes to regulator was plugged with some kind of gunk ? What kind of issues will this cause ?
rick
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01-26-2014, 12:41 AM #2
7000 RPM
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It will not give you correct fuel pressure. That is the vacuum reference.
The Reverend, (Cedar Machine Service on Facebook)
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01-26-2014, 07:03 AM #3
Screaming And Flying!
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Only thing it will do is not lower the pressure at idle. Won't hurt anything and won't affect fuel pressure at anything but idle
Erik Kiser
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01-26-2014, 08:13 AM #4
Scream And Fly Event Photographer
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Yep... The vacuum pull from the plenum at closed-throttle idle tells the regulator to lower the fuel pressure for an appropriate fuel-air mix at idle.
'89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
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01-26-2014, 12:40 PM #5
5000 RPM
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Thanks
rick
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01-27-2014, 12:54 PM #6
Screaming And Flying!
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It is a nice little hack due to the operating range of the injectors.
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01-27-2014, 02:01 PM #7
Screaming And Flying!
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Chances are the MAP sensor fitting found near the starboard front corner of the plenum is also clogged and is the usual culprit and will cause all types of running / driveability problems . If your boat sits for more than a couple of weeks it should be cleaned . I carry all the stuff to clean it with me in the boat tool bag ..
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