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post #1 of Old 08-03-2009 Thread Starter
mrmac5
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Fuel filter change

I have a Yanmar YSM8 that needs its fuel filters changed. What Id like to do is go through the steps as I understand them and get some input from members.
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Here goes:
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1) Cut off the fuel at the tank.
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2) Place cut off gallon milk carton beneath filter.
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3) Clean around primary filter.
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4) Remove water separator and filter.
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5) Clean thoroughly and put old filter in ziplock bag. Put in 5 gal bucket.
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6) Inspect O-rings. Replace if necessary.
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7) Install new filter. Do not replace fuel as this might introduce impurities downstream of the filter.
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8) Open bleed screw.
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9) Turn fuel back on.
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10) Use thumb lever pump to fill filter and bleed air.
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11) Close bleed screw when no more air comes out.
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12) Run engine for 10-15 minutes to insure that engine was properly bled.
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Repeat process for secondary filter.
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What did I leave out? If I follow these steps, is it all right to fill up filter with fuel since any impurities will be caught by the secondary filter then just not fill up the secondary filter?
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Thanks,
Dick
Dahlgren, VA
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