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  1. #1

    Default Oil in fuel filter

    Hello, this is my first post, I have a 2000 200hp Johnson ocean pro, can someone please explain why I see oil mixed with gas in my inline fuel filter also there is 2 stroke oil on the foam in the engine cover that is against the vro2 pump, are these issues related?

  2. #2
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    15,244

    Default Re: Oil in fuel filter

    So is the oil injection in service or is it running 50:1 in the fuel tank ?

  3. #3

    Default Re: Oil in fuel filter

    Yes oil injection is in service

  4. #4

    Default Re: Oil in fuel filter

    I do not mix oil in with the fuel

  5. #5

    Default Re: Oil in fuel filter

    Is this the factory filter or one you installed?

  6. #6

    Default Re: Oil in fuel filter

    Quote Originally Posted by flyingscott View Post
    Is this the factory filter or one you installed?
    One I installed, part #0360941 arrow pointed towards pump

  7. #7
    Join Date
    Apr 2010
    Posts
    4,251

    Default Re: Oil in fuel filter

    Check your cap on your oil tank for being vented properly.

  8. #8

    Default Re: Oil in fuel filter

    Ok, I smell what your stepping in, Butt... I noticed this prob at the end of 2016 season spent most of the off season researching forums, all pointed to filler cap, so I checked oil filler cap couldn’t determine if it was vented or not, made a conscious decision not to poke hole through, both boat and motor are year2000 why should I change it now. So I left it alone all through 2017 season delt with oil in my in-line fuel filter and very Smokey warm-ups and no issues all season 150+hours ( after warm up smoke clears to normal and no oil in filter) So heat,expansion,pressure, pushes oil back down fuel line while at rest right , Pulled boat from slip nov 4th she sat in driveway all week temps in Rhode Island never reached above 55*F ...result oil in filter,so I winterize boat, fog engine,empty fuel tank,cover, and put to bed. Four months later 3/18/18 sunny temperature outside 28*, temp on boat under dark green tarp 74* ...result NO oil in fuel filter . What am I missing, I’m about to spend $450 on a new vro2 before something catastrophic happens. Sorry for the loooong explanation.

  9. #9
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    2,988

    Default Re: Oil in fuel filter

    Loosen the cap and retest. Just leave it loose
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

  10. #10
    Join Date
    Nov 2005
    Location
    Mt. Zion, Illinois,
    Posts
    737

    Default Re: Oil in fuel filter

    Quote Originally Posted by faztbullet View Post
    Loosen the cap and retest. Just leave it loose
    FAZTBULLET,
    So you're saying the cap seals up and when the tank gets hot it builds pressure forcing oil through the VRO and into the carbs?

    The description on the parts page calls it 'Oil Cap with Valve'.

    http://www.marineengine.com/newparts...num=OMC0176217

  11. #11
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    2,988

    Default Re: Oil in fuel filter

    The cap has a little valve shaped like a teepee internally and is one way. It allows air and water into tank if submerged!!
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

  12. #12
    Join Date
    Apr 2016
    Location
    Isle of Wight UK
    Posts
    72

    Default Re: Oil in fuel filter

    Come accross a few of these VRO engines especially Johnson but all have been converted back to pre-mix. Now why would that be??? It tells me that the oil injeccton is not what it is cracked up to be with problems as mentioned by Daz. Getting things set up on a brand new engine is one thing but as the engine ages problems start to materialise and the more complicated the system is the harder it iis to fix. ALL engines today are OVER engineered thats why British Seagul engines being so simple are the best ever invented..

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