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96 HobieJet 95XR only starts with "manual choke"

Discussion in 'Other Boats' started by wahlspyder, Aug 20, 2017.

  1. wahlspyder

    wahlspyder New Member

    Messages:
    6
    Location:
    Indiana
    Ratings:
    +5 / 0
    Boat Make:
    Other
    Year:
    1996
    Boat Model:
    Other
    Boat Length:
    Other
    Mercury 95XR. Seems to be pumping fuel fine. If I cover the carbs with my hand, it will start, then i can take my hands away and it runs. Every time it is shut off it needs the "hand" choke. Carb issue? Reed valves? It has the auto enrichener, but no electric choke. The resistance of the auto enrich valve is 26 with my cheap meter (manual specifies 18-20 ohms cold and near infinity hot)
     
    • Optimistic Optimistic x 1
  2. Bruce

    Bruce Jetboaters Fleet Admiral Staff Member Administrator

    Messages:
    9,773
    Location:
    Royal, AR
    Ratings:
    +8,867 / 50
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    SX
    Boat Length:
    23
    I was going to suggest that it is a carb issue but you already figured that out. Hopefully your knowledge of rebuilding carbs is greater than mine.
     
  3. wahlspyder

    wahlspyder New Member

    Messages:
    6
    Location:
    Indiana
    Ratings:
    +5 / 0
    Boat Make:
    Other
    Year:
    1996
    Boat Model:
    Other
    Boat Length:
    Other
    Guess I'll pull them apart and see what I can find. I imagine I'll find something plugged.
     
    • Optimistic Optimistic x 1
  4. Bruce

    Bruce Jetboaters Fleet Admiral Staff Member Administrator

    Messages:
    9,773
    Location:
    Royal, AR
    Ratings:
    +8,867 / 50
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    SX
    Boat Length:
    23
  5. Cobra Jet Steering LLC

    Cobra Jet Steering LLC Jetboaters Captain

    Messages:
    2,209
    Location:
    Florida
    Ratings:
    +2,070 / 36
    Boat Make:
    Yamaha
    Year:
    2014
    Boat Model:
    Other
    Boat Length:
    Other
    Not familiar with that motor but if it has no choke and it uses some sort of fuel primer, I would look for why it won't work obviously that is the first culprit
     
    • Like Like x 1
  6. Cobra Jet Steering LLC

    Cobra Jet Steering LLC Jetboaters Captain

    Messages:
    2,209
    Location:
    Florida
    Ratings:
    +2,070 / 36
    Boat Make:
    Yamaha
    Year:
    2014
    Boat Model:
    Other
    Boat Length:
    Other
    also a lot of older 2 stroke skies used a manual primer so perhaps he can find one and convert to a manual fuel primer to start the engine if he can't fix the original one
     
    • Like Like x 1
  7. Speedling

    Speedling Jetboaters Admiral

    Messages:
    3,705
    Location:
    Cedar Lake, IN
    Ratings:
    +2,972 / 22
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    SS
    Boat Length:
    21
    If i can bug my buddy tomorrow I will explain this hand choke thing to him and he may have an answer. He's a great knowledgable guy that has fixed every motor I could have imagined. I haven't heard of an auto enrichener but I am going to guess it's a vacuum based system to feed more fuel as needed. How does the choke work on the motor?
     
    • Like Like x 1
  8. Speedling

    Speedling Jetboaters Admiral

    Messages:
    3,705
    Location:
    Cedar Lake, IN
    Ratings:
    +2,972 / 22
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    SS
    Boat Length:
    21
  9. wahlspyder

    wahlspyder New Member

    Messages:
    6
    Location:
    Indiana
    Ratings:
    +5 / 0
    Boat Make:
    Other
    Year:
    1996
    Boat Model:
    Other
    Boat Length:
    Other
    Not sure how the auto-enricher works. It has a slide that looks like the slide on a motorcycle carb. There is a paraffin pill inside that melts to allow it to move. The specs say that the resistance through the valve should be 18-20 ohms when cold and near infinity when the engine is hot. I got somewhere around 26 ohms on a 90 degree day. The auto enricher is mounted to the reed valve assembly it looks like according to the manual. That was why i asked if maybe it was a problem there. It also has a primer bulb inline between the tank and the fuel pump. I can see through the inline filter between the pump and the carb that it is getting fuel to the carbs.
     
  10. Jgorm

    Jgorm Well-Known Member

    Messages:
    302
    Location:
    San Diego / Colorado river
    Ratings:
    +108 / 11
    Boat Make:
    Yamaha
    Year:
    2004
    Boat Model:
    AR
    Boat Length:
    23
    I'd guess the jets are clogged, or the float is low. Too little fuel cause it to lean misfire until you manually choke it to richen it up.
     
  11. wahlspyder

    wahlspyder New Member

    Messages:
    6
    Location:
    Indiana
    Ratings:
    +5 / 0
    Boat Make:
    Other
    Year:
    1996
    Boat Model:
    Other
    Boat Length:
    Other
    Once it starts,it seems to run well. It just isn't rich enough to start
     
  12. wahlspyder

    wahlspyder New Member

    Messages:
    6
    Location:
    Indiana
    Ratings:
    +5 / 0
    Boat Make:
    Other
    Year:
    1996
    Boat Model:
    Other
    Boat Length:
    Other
    Took carbs off, cleaned them, blew air through everything. Got some crud out. Put everything back together and it seems to be good. Fingers crossed
     
    • Like Like x 1
    • Optimistic Optimistic x 1
  13. wahlspyder

    wahlspyder New Member

    Messages:
    6
    Location:
    Indiana
    Ratings:
    +5 / 0
    Boat Make:
    Other
    Year:
    1996
    Boat Model:
    Other
    Boat Length:
    Other
    Took it out for the first time. Very pleased. Thanks to all who contributed!
     
    • Winner Winner x 1
  14. RedBarron55

    RedBarron55 Member

    Messages:
    79
    Location:
    Navarre, FL
    Ratings:
    +18 / 0
    Boat Make:
    Jetcraft
    Year:
    1995
    Boat Model:
    Other
    Boat Length:
    16
    Make sure you have the throttle rigged properly.
    For t he enriching system to work the butterflies must be completely closed per the manual.
    If they are cracked open then the enrichment valve will not work.
    The control must be in the center idle position.
     

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