Baller lkb Posted February 13, 2011 Baller Share Posted February 13, 2011 My 2009 196 with 343 engine has been having trouble. It seems like a fuel thing to me. It will plane off get to 34, then lose rpm, bog down, some backfiring. It will run at idle no problem. It just happens at speed. I replaced the inline fuel filter and it ran fine for about 4 hrs. Then same thing. I checked the primary pump on the side of the fuel cell and it seemed to be OK visually. I replaced the filter inside the fuel cell also. Anybody? Link to comment Share on other sites More sharing options...
Baller eyepeeler Posted February 13, 2011 Baller Share Posted February 13, 2011 Fresh fuel? I had to put 10 gal of fresh fuel in mine two weeks ago to get it to run right. Link to comment Share on other sites More sharing options...
Baller lkb Posted February 13, 2011 Author Baller Share Posted February 13, 2011 about 4 engine hrs ago, I completely drained the tank and then put in that new inline filter...ran perfect for a bit then the same thing all over Link to comment Share on other sites More sharing options...
Baller eyepeeler Posted February 13, 2011 Baller Share Posted February 13, 2011 Check valve on the fuel vent stuck? I think I remember some guys having trouble with that. Link to comment Share on other sites More sharing options...
Baller lkb Posted February 13, 2011 Author Baller Share Posted February 13, 2011 would that be the same as the tank overflow? Link to comment Share on other sites More sharing options...
Baller eyepeeler Posted February 13, 2011 Baller Share Posted February 13, 2011 Yes Link to comment Share on other sites More sharing options...
Baller A_B Posted February 13, 2011 Baller Share Posted February 13, 2011 The tank usually has a few checkball type fittings. There is one that supplies gas to the fuel pump, and some guys have had the ball get stuck in the closed or semi-closed position. They sit on top of the tank, and the main feed is usually marked with red tape or something to differentiate it. You can clean it out with brake cleaner or fuel injector air inlet cleaner, or anything like electrical parts cleaner that evaporates quickly without residue. I have heard that fuel stabilizer can cause this to get gummed up. Your boat is too new for this, but something could get lodged in there I guess.  I guess a spider could lodge itself in one of the air inlets. One way to test this is if this happens again, take your gas cap off and see if that fixes it. The backfiring is sounding somewhat electrical to me. Gas usually just dies out. Do you notice any gauges losing power when this happens? Sometimes the ground wire on the battery, if you have one, can cause sporadic short outs if not grounded well. Link to comment Share on other sites More sharing options...
Baller lkb Posted February 13, 2011 Author Baller Share Posted February 13, 2011 ThanksI haven't noticed the gauges but I'll check more tomorrow.Does water in gas ever cause a backfire? Link to comment Share on other sites More sharing options...
Baller Bill Gladding Posted February 13, 2011 Baller Share Posted February 13, 2011 Does the red warning light come on when this happening? If so you need to get a mechanic to plug in and see what is up. Link to comment Share on other sites More sharing options...
Baller lkb Posted February 13, 2011 Author Baller Share Posted February 13, 2011 Bill, I didn't look for that but will check tomorrow. About the backfiring, it's really pretty minimal. It mainly loses power, like you had pulled the throttle back some, and surges. Link to comment Share on other sites More sharing options...
Baller Drago Posted February 13, 2011 Baller Share Posted February 13, 2011 Spark plug wires, happened to a 95 SN and to my 02 pickup, same symptoms Link to comment Share on other sites More sharing options...
Baller lkb Posted February 13, 2011 Author Baller Share Posted February 13, 2011 Drago, do you think it would idle perfectly with bad spark plug wires? Link to comment Share on other sites More sharing options...
Baller skiinxs Posted February 13, 2011 Baller Share Posted February 13, 2011 Buy (or borrow from AutoZone) a fuel pressure gauge. Attach the fuel pressure gauge to the schrader valve on the fuel rail. Watch to see if the fuel pressure drops off when the boat starts to stall / backfire. If it does it is fuel related, if it doesn't, it is  likely ignition related. If it runs ok for a few seconds after taking off from idling then falls off, it is probably filling the FCC at idle then as soon as the fuel in the FCC is used up the high pressure pump starts to lose its source of fuel and the fuel pressure drops, I would suspect the low pressure fuel pump,water in fuel tank, or a stuck anti-siphon valve (which has already been mentioned).Dave Link to comment Share on other sites More sharing options...
Baller AggieSkier Posted February 13, 2011 Baller Share Posted February 13, 2011 Had exact same problems w/ my 02 196. Replaced ck valve, fuel filter and still had problems. Turned out the problem was the 2" long fuel line inside the FCC. It had a small hole. Replaced it and problem solved. Now I'll change the hose at every fuel filter change. Link to comment Share on other sites More sharing options...
east tx skier Posted February 13, 2011 Share Posted February 13, 2011 When I had this problem, it was the antisiphon valve on the tank. Easy $11 fix. Definitely check the short hose in the FCC as well. Link to comment Share on other sites More sharing options...
jefflyman Posted February 13, 2011 Share Posted February 13, 2011 You said replaced the inline filter then it ran fine for 4 hours then did it again. Sounds like dirt or something in the tank. Pull out and look inside? Should be under warrenty? Or, I bought a new boat years back with similar issues turned out to be the fuel tank vent was clogged with buffing compound from the factory, cleaned and all good. Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted February 14, 2011 Baller_ Share Posted February 14, 2011 A lot of good advice here. One of the things that I do when I have a similar symptom is first install the fuel pressure gauge then I have a remote 5 gal tank That I can install and isolate the boats tank. If the problem still exisists then the boat tank is not the problem. Then move on to low pressure pump fuel filters and known FCC failures. If the fuel delivery problem does not manifest it self with the remote system in place then I go back to the Anti syphon, pull out the pickup tube, vent clog ect ect. One time a number of years ago I had one that was really a stumper after all the routine checks I could not find any think wrong. Long story short the fuel line inner liner had colapsed and was not allowing fuel to be pulled thru the hose. just try and be methodic when running these diagnostic routines if you dont have the tools or do not have access to them it is best to consult a service shop and have it taken care of their. Link to comment Share on other sites More sharing options...
clemsondave Posted February 14, 2011 Share Posted February 14, 2011 Good advice Jody. Love the 5 gal tank idea. Isn't this still under warranty? Link to comment Share on other sites More sharing options...
Baller lkb Posted February 14, 2011 Author Baller Share Posted February 14, 2011 Thanks for all the suggestions. I think I got it.The gas pickup tube in the tank has a wire mesh screen over it. The way it was made was not helping anything. The ends were folded and soldered leaving almost no area with just a single layer of mesh. And what little bit of area that could allow flow was clogged with gunk. Link to comment Share on other sites More sharing options...
Members acmx Posted February 14, 2011 Members Share Posted February 14, 2011 lkb,you guys skiing down there? Link to comment Share on other sites More sharing options...
Baller lkb Posted February 14, 2011 Author Baller Share Posted February 14, 2011 Nah, but it was plenty nice enough today. I have just been layin' around all winter. It's gonna hurt when I do get started :-)You healed up and ready to go? Link to comment Share on other sites More sharing options...
bmiller3536 Posted February 15, 2011 Share Posted February 15, 2011 LKB, We had a similar problem with our 196Â Nautique. it was the fuel pump located on the fuel tank. We just tapped it with wrench and it ran great. It may have been the ball getting stuck or some debris clogged up. We have a tendacy to run our boat low on fuel and I think that had something to do with the cause of the problem.Good Luck Link to comment Share on other sites More sharing options...
Members acmx Posted February 16, 2011 Members Share Posted February 16, 2011 gettin there, gonna try and go real slow when it gets warmer Link to comment Share on other sites More sharing options...
Baller lkb Posted February 19, 2011 Author Baller Share Posted February 19, 2011 Problem solved. It was the screen over the fuel pickup hose in the tank. Clogged up and too little usable screen area to begin with.Thanks for the help. Link to comment Share on other sites More sharing options...
303Skier Posted June 17, 2016 Share Posted June 17, 2016 Old post but I am a similar issue with my 08' 196 343. Started falling on it's face in the course. Will run good for about a pass or two then starts again. I notice it worse at 36 MPH compared to slower speeds. Never dies but will fall on it's face bad! I'm going to start by putting a fuel pressure gauge on. If no loss of pressure I'll look at all connectors, wires, plugs. If fuel pressure goes down I'll check the vent on tank and pickup screen. All the filters were replaced at the beginning of this season. Link to comment Share on other sites More sharing options...
Baller FLeboeuf Posted June 21, 2016 Baller Share Posted June 21, 2016 I've had similar symptoms last year and the dealer made change the fuel filters and check everything fuel related and even changed the fuel. Turned out it was the cap and rotor that had not been changed in 400 hours. My engine is a 343 also but 2011. Could be that also. Very easy fix. Link to comment Share on other sites More sharing options...
Baller gregy Posted June 21, 2016 Baller Share Posted June 21, 2016 My buddys 08 PS 197 had a wear on the distributor gear that was causing a similar problem. Only had a little over 500 hrs. Two dealers couldn't figure it out. We hooked a computer to it and noticed the timing was jumping around. Link to comment Share on other sites More sharing options...
303Skier Posted June 21, 2016 Share Posted June 21, 2016 The gas tank had shifted over and was putting pressure on the line causing the line to be kinked. Also the filter on top of the tank was replaced. I will test in next few days to see if that was the issue. 90% sure it was the kink in the line. Link to comment Share on other sites More sharing options...
303Skier Posted June 21, 2016 Share Posted June 21, 2016 The gas tank had shifted over and was putting pressure on the line causing the line to be kinked. Also the filter on top of the tank was replaced. I will test in next few days to see if that was the issue. 90% sure it was the kink in the line. Link to comment Share on other sites More sharing options...
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