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Fuel water separator

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06 hurricane 237 SD with Yamaha 250 4-Stroke. Recently inherited. Trying to get back to 100%.  90 hours. Engine idle is very rough. Already changed all plugs, drained and filled with new oil. New batteries. Still rough idle. Local shop has an appt with me a few weeks away but they suggested a look at the fuel/water separator. The one on the engine seems OK, but he said there will be another between the engine and tank. Any ideas where?  I checked all holds as best I can, but still do not see it. Any ideas or guidance please

Comments

  • omar174
    omar174 Member Posts: 167 ✭✭✭
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    Did you change the fuel filter? How old is the gas? 

    2003 GS211 Yamaha 150 HP OX66
  • nquirk
    nquirk Member, Moderator Posts: 672 ✭✭✭✭
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    Follow your fuel supply line back from the engine into the bilge area.  You should see something like this http://i34.tinypic.com/v680b9.jpg

    As @omar174 stated, change the fuel filter.  Then you know you've removed another potential problem.  Old fuel can also be a problem but you didn't indicate its relative age.

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    2010 Hurricane SS 188 OB
    2010 Mercury Optimax 200HP / Mercury SS High Five 19P
    2010 Trailmaster SC trailer
  • bshippjr
    bshippjr Member Posts: 116 ✭✭✭
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    Just throwing this out there and it may not be applicable with a 4 stroke, but when I bought my 217 w/Johnson 2 stroke, it idled and ran rough.  A mechanic told me before I brought it to him to shock it with double strength Seafoam and run it wide open.  This did the trick for me.
    2000 Hurricane SD 217 OB