Logo
Click for Crusader parts and manuals!
Results 1 to 5 of 5
  1. #1
    Join Date
    Oct 2009
    Location
    New Haven, CT, USA
    Posts
    601

    Default Racor - vacuum gauge (Racor alternative)

    Burried in my WOT thread was mention of a Racor fuel filter vacuum gauge alternative. Mark forwarded me a link where somone described using these instead of the $100 per gauge option from Racor directly. This was a 5 min install and appear to work well. They also seem really well made (better than I thought).

    At idle, I get a reading of around 7.5hg on a brand new filter. I get just around the same reading on my other engine but that filter is two years old with about 130 hours. If I read correctly, the initial reading does not matter so much because it will vary by engine/configuration. Once you have that baseline, I think you want to change the filter if it rises about 5hg above your baseline. Click image for larger version. 

Name:	image.jpg 
Views:	17 
Size:	23.7 KB 
ID:	15960

    Do I have that part correct? I wish my old filter had a higher reading which I was sort of expecting but my fuel system is really clean from end to end. Ethanol is good for that!

  2. #2
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    6,765

    Default Re: Racor - vacuum gauge (Racor alternative)

    Bob:

    Mostly, I'd agree...though the 7.5" vacuum seems a bit high - did you put the gauge on the inlet or outlet side of the spin-on?

  3. #3
    Join Date
    Oct 2009
    Location
    New Haven, CT, USA
    Posts
    601

    Default Re: Racor - vacuum gauge (Racor alternative)

    It is on the outlet side which was previously plugged. I could "T" it off the inlet side if that's a more accurate reading?

  4. #4
    Join Date
    Aug 2008
    Location
    Fairport, NY
    Posts
    1,625

    Default Re: Racor - vacuum gauge (Racor alternative)

    Seems like you would want a differential input gauge. SO, the tank level or an anti-siphon valve would not affect the reading.

  5. #5
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    6,765

    Default Re: Racor - vacuum gauge (Racor alternative)

    between the filter and the pump is the 'normal' spot.....just seems like a significant drop.....

    Agee with Dave that a differential gauge would be ideal but that accuracy will cost a lot more than the Racor single ended gauge...

Similar Threads

  1. Racor - water drain
    By bobct in forum Crusader Marine Engine Forum
    Replies: 14
    Last Post: 10-18-2011, 06:08 PM
  2. Racor questions
    By bobct in forum Crusader Marine Engine Forum
    Replies: 2
    Last Post: 07-03-2011, 09:12 AM
  3. Racor Water Seperator
    By jake1234 in forum Crusader Marine Engine Forum
    Replies: 24
    Last Post: 01-19-2011, 12:35 PM
  4. Racor fuel filter
    By jeb in forum Crusader Marine Archive
    Replies: 5
    Last Post: 06-29-2009, 05:59 PM
  5. What Racor for 225
    By piraya33 in forum Honda Outboard Archive
    Replies: 10
    Last Post: 10-28-2008, 07:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •