Baller Spuddy Posted July 1, 2014 Baller Share Posted July 1, 2014 I have a 1997 196. About three years ago we had the anti sphion valve repalced because at over 30 mph the boat was hesitating and it some cases dropping right to 20 mph. Now it has started to do the same thing again, just in time for summer holidays!! Any thoughts on if this could be the same issue with the anti sphion valve or something else. It does have PP star gazer but will hesitate with the system on or off so I am sure it is not an issue with speed control. It will run all day without and issue at wakeboard speeds. Any thoughts ideas would be great. Thanks. Link to comment Share on other sites More sharing options...
Baller SkiJay Posted July 1, 2014 Baller Share Posted July 1, 2014 @Spuddy I've had that. It was a dirty fuel filter for me. Link to comment Share on other sites More sharing options...
Baller Jordan Posted July 1, 2014 Baller Share Posted July 1, 2014 It can only be fuel or electrical....the odds of an electrical problem are low. So...check fuel filters, anti-syphon valve and fuel pump ... I have a different boat but had a similar problem a few years ago and it was a build up of grime in an inlet screen in the external electric fuel pump. Follow the fuel path and you will track it down. Link to comment Share on other sites More sharing options...
SM Posted July 1, 2014 Share Posted July 1, 2014 I had that in my Mastercraft. The fuel pickup in the tank was clogged. Only when you went to high fuel demand did it sputter out. Link to comment Share on other sites More sharing options...
Baller jhughes Posted July 1, 2014 Baller Share Posted July 1, 2014 If it's cutting out at 2800 RPM it could be the GT40 S.L.O.W limp home mode. It is caused by only 2 things- the oil pressure switch (known to leak and go bad) or the high water temp switch or connections to either. Disconnect both and see if you still get the cutting out. You'd also be getting a check engine light, potentially just flickering. Just throwing it out there. You'd know if it was in SLOW mode because the cut-out is quite violent and abrupt. Link to comment Share on other sites More sharing options...
Baller rawly Posted July 1, 2014 Baller Share Posted July 1, 2014 My old boat did this when the water separating fuel filter filled with water. Does your boat have one ? The thing that looks like an oil filter. Higher rpm loss of power usually points to something slowing the fuel flow. Post the remedy so it might help the next guy with your problem. Good luck. Link to comment Share on other sites More sharing options...
Baller Drago Posted July 1, 2014 Baller Share Posted July 1, 2014 Happened to me in '98 with a '97 SN. Spark plug wires Link to comment Share on other sites More sharing options...
Baller Spuddy Posted July 1, 2014 Author Baller Share Posted July 1, 2014 Thanks for all the input. The fuel filter is new and clean, spark plug wires are new as of '12 and have about 75 hours on them so I am hoping those are good. @ob where is the inline filter located specifically? Thank you all. Link to comment Share on other sites More sharing options...
Baller BraceMaker Posted July 1, 2014 Baller Share Posted July 1, 2014 88 did it when the dip tube in the tank plugged up. Link to comment Share on other sites More sharing options...
Baller Spuddy Posted July 1, 2014 Author Baller Share Posted July 1, 2014 @rico yes it is the GT 40. I will take a look at all of these suggestions. Link to comment Share on other sites More sharing options...
Baller DanE Posted July 2, 2014 Baller Share Posted July 2, 2014 @Spuddy Only one of the two relays mentioned feeds the fuel pumps (both pumps) the other relay is power supply for ECM. In case you get stuck, one thing worth mentioning is that the actuating current to the fuel pump relay goes through a diode concealed in the wiring harness. Failiure to that diode has happened before. Measure voltage at the posts on fuel pump relay under load (relay attached, engine running)to make sure adequate voltage is present Link to comment Share on other sites More sharing options...
Baller Spuddy Posted July 5, 2014 Author Baller Share Posted July 5, 2014 It turns out it was clogging at the pick up in the bottom of the tank, pulled it out seems to be running ok. So far so good. Thanks for all the feedback. Link to comment Share on other sites More sharing options...
Rjohns87 Posted August 31, 2015 Share Posted August 31, 2015 98 nautique Fuel cell not firing up Last time i had it out it was not idling properly This time started and ran 5 mins Til fuel in cell ran out Sounds electrical Relays? Filters would not effect the pump not running? Link to comment Share on other sites More sharing options...
Baller Spuddy Posted August 31, 2015 Author Baller Share Posted August 31, 2015 @Rjohns87 I would start a new thread on this to see if you can get a reply. I am afraid I am not much help for what you are describing. Link to comment Share on other sites More sharing options...
Baller Ilivetoski Posted September 1, 2015 Baller Share Posted September 1, 2015 we had similar issues with my 04 LXi. I strongly disagree that it could only be fuel or electrical, because we looked at every part of that boat including the transmission and engine. Link to comment Share on other sites More sharing options...
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