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  1. #1
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    Difference between a HPDI and a 3.1

    Hey guys, I could use your help. I’m looking at a couple of 2004 Skeeters and one has a HPDI and the other has what just says 3.1 on it. I’ve never owned a Yamaha so any help would be appreciated.
    2006 Skeeter ZX225

  2. Member
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    Apr 2015
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    ponchatoula la
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    #2
    the hpdi is high pressure direct injection. if its a 200 and up it has a 3.3 block. these engines are known to have issues and a bad rep. for blowing. do some research on here. plenty about them. the 3.1 is an ox66 fuel inj. imo and many others the best engine out there. I passed on any rig with a 3.3 hpdi. ox66 is a sweet engine if taken care of

  3. Member
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    Aug 2006
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    Lake Tapps, WA
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    #3
    Thanks. I really appreciate it!
    2006 Skeeter ZX225

  4. Member
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    Nov 2004
    Location
    Columbus, Indiana
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    #4
    3.3 HPDI - direct injection.
    3.1 OX66 - throttle body injection

  5. Member
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    May 2007
    Location
    Colonial Heights Virginia
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    #5
    3.1 if you have a choice. Easy to work on and if your mechanically inclined easy to do vst filter, bowl filters and very easy to remove and service the injectors.

  6. Member
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    May 2015
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    Washington
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    #6
    PM sent

  7. Member DeGraaf's Avatar
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    Mar 2011
    Location
    Channahon, IL.
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    842
    #7
    Is the HPDI that bad? I'm lookin' at a 2005 225 HPDI. If it's is good shape is it still to be avoided? I'm willing to keep fuel and filters clean. As bad of reputation as like a Fitch?
    Hard to believe Yami would put a gernade on the market..........Please help
    2000 Ranger 520DVX 225hpdi

  8. Member
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    Jul 2016
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    Dubuque ia
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    #8
    I have a 3.3 250 hpdi. It did blow the powerhead after i bought it 2yrs ago. (#3 cyllinder) But, i also dont know how it was taken care of. However, they are fast motors, and i have heard lots of good of them when they are properly maintained. Clean fuel/filters is a must. Get the compression checked by a reputable mechanic, and have everything tested. Thats the best i can say.

  9. Member
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    Apr 2015
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    ponchatoula la
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    #9
    worst engine Yamaha ever built damn near killed them. run don,t walk. unless your wallet is deeper than mine. I'm trying to help u

  10. Member
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    Aug 2016
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    Palmyra, MO
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    #10
    The 2004 200 HPDI is a 2.6L. The 200 hp HPDI didn't go to the 3.3 until 2005. I owned a 2004 200 HPDI and never had a bit of trouble with it. I always ran Yamalube oil and Ring Free in it and it was a great motor. Now I have a 2005 225 HPDI and love it. They are better on fuel than the regular 3.1 OX66. The 2.6L does lack power if it is pushing a good sized boat. It was a little small for the 196 Champion I had.

  11. Member
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    Dec 2007
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    Prairieville, LA
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    422
    #11
    I bought a 2006 Stratos with a HPDI in 2008....only had 24hrs on it....now has close to 400...no issues...regular filter changes and plugs a must....Yamalube and Ring Free