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  1. #1
    knewboater is offline Registered User
    Location : North Somerset.
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    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
    Lakesailor's Avatar
    Lakesailor is offline Registered User
    Location : A North Country Lake
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    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?


  3. #3
    knewboater is offline Registered User
    Location : North Somerset.
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    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
    pvb's Avatar
    pvb is offline Registered User
    Location : UK East Coast
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    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.
    Finally taken delivery!

  5. #5
    Join Date
    May 2003
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    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
    knewboater is offline Registered User
    Location : North Somerset.
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    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
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    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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