Baller_ Wish Posted June 12, 2017 Baller_ Share Posted June 12, 2017 So periodically when dropping a skier...skier starts cutting out, throttle brought to neutral...there's this rev like the throttle did not return, yet boat is in nutral. Lasts for only a second or two but it's audible. Is that the return spring on the throttle getting old? 1997 SN GT40. Also, is this the correct impeller? Link to comment Share on other sites More sharing options...
Baller ScottScott Posted June 13, 2017 Baller Share Posted June 13, 2017 Your battery is getting low.... Link to comment Share on other sites More sharing options...
Baller_ Wish Posted June 13, 2017 Author Baller_ Share Posted June 13, 2017 It is an early version of PP. It does require the occasional loosening of the servo knob to adjust for revs but that only occurs at start ups. Turn boat on, RPMs maybe at 900, turn knob to loosen cable and it goes right back to normal RMPs. I believe PP upgrade back then solved this. But this is when skier is being dropped. Thinkn not the same....maybe Link to comment Share on other sites More sharing options...
Baller oldjeep Posted June 13, 2017 Baller Share Posted June 13, 2017 Sounds like a possible vacuum leak. Link to comment Share on other sites More sharing options...
Baller dvskier Posted June 13, 2017 Baller Share Posted June 13, 2017 That is the correct impeller for a GT-40 engine. Link to comment Share on other sites More sharing options...
Baller_ Wish Posted June 13, 2017 Author Baller_ Share Posted June 13, 2017 @ScottScott ....huh???? Link to comment Share on other sites More sharing options...
Baller Onside135 Posted June 13, 2017 Baller Share Posted June 13, 2017 @scottscott...I see what you did. Link to comment Share on other sites More sharing options...
Administrators Horton Posted June 13, 2017 Administrators Share Posted June 13, 2017 @OB1 Google rotary phone Goode ★ HO Syndicate ★ KD Skis ★ MasterCraft ★ PerfSki Radar ★ Reflex ★ S Lines ★ Stokes ★ Baller Video Coaching System Drop a dime in the can Link to comment Share on other sites More sharing options...
Baller ScottScott Posted June 13, 2017 Baller Share Posted June 13, 2017 @Wish Just a dumb joke referring to your cell phone screen shot.... Woulda been funnier if the battery was even lower . Link to comment Share on other sites More sharing options...
Baller Orlando76 Posted June 13, 2017 Baller Share Posted June 13, 2017 I'm poor and don't have deep pockets so I know what PP is. Sure seems like it's PP doing its thing. My '93 with single line PP does it and so does my old partners '01 GT40 with single line PP. Maybe try skiing one day with handle throttle and see if it still does it? Link to comment Share on other sites More sharing options...
Baller MrJones Posted June 13, 2017 Baller Share Posted June 13, 2017 Hmmm. I just though it was going to be a Goode bashing thread from the title... ;) Link to comment Share on other sites More sharing options...
Baller DanE Posted June 13, 2017 Baller Share Posted June 13, 2017 @Wish If PP affects idle at any point your throttle lever and/or PP cable is incorrectly adjusted. Refer to manuals, when you return throttle to neutral/idle there is no way a properly set up PP servo can have input on rpms. Link to comment Share on other sites More sharing options...
Baller BrennanKMN Posted June 13, 2017 Baller Share Posted June 13, 2017 My GT-40 would do that until I added the second return spring for PP. It was because my throttle wouldn't close all the way every time, but would get to neutral. It would sit around 1000 RPM. Once I added the second return spring the throttle would return to idle every time. Link to comment Share on other sites More sharing options...
Baller_ DW Posted June 13, 2017 Baller_ Share Posted June 13, 2017 @Wish : PP is sensitive to throttle return spring stiffness, the tendency is to want more spring stiffness to return the throttle to idle. Try a new or stiffer spring as noted by Brennan. Link to comment Share on other sites More sharing options...
Baller DanE Posted June 13, 2017 Baller Share Posted June 13, 2017 @Mark_Matis Yes I agree, my point was if PP cable, brass lever and throttle cable was properly installed and adjusted PP has nothing to do with this as it is completely taken out of the picture in neutral as the throttle cable pushes throttle lever all the way to idle. Most likely another problem, vacuum leak, faulty idle valve, or my favorite- broken diaphragm in the fuel pressure regulator causing random squirts of fuel entering the intake manifold, typically occurs when you bring the throttle towards idle and the intake manifold pressure drops. Very easy check, just pull the vacuum hose from the regulator with engine running, the fitting must be completely dry. Link to comment Share on other sites More sharing options...
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