What micron filter

Discussion in 'Performance Outboard Motors' started by David B, Jul 13, 2017.

  1. David B

    David B Active Member

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    Tell me what micron filter u use between tank and fuel pump on your horn motor. 10 micron,25 micron 100 micron etc.
     
  2. xb03

    xb03 Active Member Supporting Member

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    I use a fuel water separator its probably 100 micron before the pump and then a 10 micron after the fuel pump to protect the injectors.
     
  3. David B

    David B Active Member

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    I also use a water seperator filter but I can't find a filter higher than 25 micron for it
     
  4. gmorgan

    gmorgan Active Member

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    I use the Mercury water separator spin-on filter. I haven't had a problem with it at all.
     
  5. David B

    David B Active Member

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    Ok thanks
     
  6. Bobalouie

    Bobalouie Active Member

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    100 micron pre pump filter, 10 micron post pump filter
     
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  7. David B

    David B Active Member

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    If I go with a 100 micron before I will have to loose my water Sep filter. Is this ok
     
  8. brund

    brund Active Member

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    What motor? on a 260 or 280, I use 100 micron before
     
  9. David B

    David B Active Member

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    It's da 260
     
  10. scj

    scj Active Member

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  11. David B

    David B Active Member

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    Scj how u been buddy
     
  12. 90 5.0

    90 5.0 Active Member

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    10 micron is a bigger hole than 100 micron.

    But the 10 first and the 100 after the pump. If you do it the other way and you have a high fuel demand the net positive suction head can be effected before the pump and you will have fuel delivery issues on the big end.
     
  13. Bobalouie

    Bobalouie Active Member

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    Yea, I had that backwards, sorry. It is 10 before to protect the pump and 100 after to protect the injectors.
     
  14. ssv1761982

    ssv1761982 Active Member Staff Member

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    That doesn't make sense to me but I haven't messed with filters much. This is what I found using google:

    Which Is Finer? One Micron Or 100 Microns?
    It's easy to get confused when it it comes to filters. It's easy to imagine that 100 microns would be a better filter than 1 micron, but this is the exact opposite. Again think in terms of the hole size in the filter medium. If a micron is a unit of measure, then ten microns must be ten times bigger than one micron, and one hundred microns must be ten times bigger than ten microns.

    So, if a filter is 100 microns, the holes that do the filtering are 100 times bigger than those found in a one micron filter.

    Filtering In Microns Made Easy
    Still confused? Okay, so I'm not a scientist and my explanation may be a little off, so here's a quick guide:

    Coarse Filtering = 500 Microns, 200 Microns, 100 Microns

    Medium Filtering = 50 Microns, 20 Microns

    Fine Filtering = 5 Microns, One Micron
     
  15. David B

    David B Active Member

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    That's what I thought. 100 microns let's more particles through. I was told to put 100 micron between tank and pump and 10 micron between pump and injectors
     
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