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  1. #1
    Join Date
    Jan 2005
    Location
    North Somerset.
    Posts
    166

    Default Undoing the nut on a yanmar 3gm Help please?

    Was on a friends boat today and wanted to change the fuel filter cartridge, the filter is in a very inacessable place so to undo the nut at the top of the filter case we thought we could tap it with a screwdriver and hammer, as there is not enough room for a spanner, then we thought this maybe the wrong way to attack it and someone out there might know better, so can anyone help? it would be much appreciated.

  2. #2
    Join Date
    Feb 2005
    Location
    Near Here
    Posts
    34,871

    Default Re: Undoing the nut on a yanmar 3gm Help please?

    You need a filter wrench http://images.google.co.uk/imgres?im...3Doff%26sa%3DN. You can stick a screwdriver through the canister and undo it that way, but it allows fuel to leak all over.

    Is it a disposable one like this?

    Another person's thoughts about you are outside of your jurisdiction.

  3. #3
    Join Date
    Jan 2005
    Location
    North Somerset.
    Posts
    166

    Default Re: Undoing the nut on a yanmar 3gm Help please?

    No it is a metal bowl which has a paper cartridge inside and a nut like collar at the top which presumably unscrews. Thanks RGH

  4. #4
    Join Date
    May 2001
    Location
    UK East Coast
    Posts
    22,804

    Default Have a look at...

    Have a look at http://83.162.27.211:83/yanmar/Yanmar.gm-series.pdf maintenance guide. There's a little exploded drawing showing how the fuel filter housing is removed by unscrewing the retaining ring.

  5. #5
    Join Date
    May 2003
    Location
    Cornwall
    Posts
    1,478

    Default Re: Undoing the nut on a yanmar 3gm Help please?

    Using a flat bladed screwdriver with some insulation tape or masking tape over the end (to protect the ring a bit), drive the retaining ringclockwise when viewed from above, as a tip its a good idea to replace the o-ring on the top of the filter bowl as well.

    steve

  6. #6
    Join Date
    Jan 2005
    Location
    North Somerset.
    Posts
    166

    Default Re: Undoing the nut on a yanmar 3gm Help please?

    Thank you all very much for your help,should be ok now.RGH

  7. #7
    Join Date
    Jul 2001
    Location
    Burnham on Crouch
    Posts
    213

    Default Re: Undoing the nut on a yanmar 3gm Help please?

    it's probably the same as on my 1GM 10 and that does need a strap wrench - I got a metal one from a car spares shop. The only prtoblem I have is that I have to loosen off the banjo nut at the side to get enough clearance to get the strap wrench all the way round the slotted ring at the top. It then comes off fine - if you can remember which way to turn it! Hammers and screwdrivers would worry me a bit!

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