Idle Vibration with Fuel/Water Separator? - Moderated Discussion Areas

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Author Topic:   Idle Vibration with Fuel/Water Separator?

Dave284 posted 08-18-2008 09:50 AM ET (US)

Boat: Whaler 17 2007 Merc 90 4 Stroke
Just put a racor water fuel separator on.
And I'm not sure, but I think I notice a new slight vibration on the engine in the idle state. A slight shake back and forth.
Question: Would a water fuel separator cause this? And if so, is there something to do to get rid of it?
Thanks for any answers/thoughts...
Dave
AtoZ posted 08-18-2008 10:30 AM ET (US)
The only thing I can think of is a low vacuum at idle may not be enough to pull in an adaquate fuel supply. I know some manufacturers recommend against adding another filter just for this reason.

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Author	Topic: Idle Vibration with Fuel/Water Separator?
Dave284	posted 08-18-2008 09:50 AM ET (US) Boat: Whaler 17 2007 Merc 90 4 Stroke Just put a racor water fuel separator on. And I'm not sure, but I think I notice a new slight vibration on the engine in the idle state. A slight shake back and forth. Question: Would a water fuel separator cause this? And if so, is there something to do to get rid of it? Thanks for any answers/thoughts... Dave
AtoZ	posted 08-18-2008 10:30 AM ET (US) The only thing I can think of is a low vacuum at idle may not be enough to pull in an adaquate fuel supply. I know some manufacturers recommend against adding another filter just for this reason.