- Location
- United Kingdom
Hello all!
Got some running issues with a superjet, its a 99 rn with a stock 701 engine apart from the protec pipe (mach 1) basicly runs good on trailer with no issues.. get it in the water and well first off its realy boggy off the start then all of a sudden it will clear up and be like a rocket for a while then sometimes will be boggy off the throttle again ect.. its a hard one to explain as its sometimes good then sometimes boggy.. almost like its being starved of fuel, but its so random its hard to work out what it is.. its almost as if something gets blocked up then clears.. :thinking: when the pipe was fitted i was told by a well known jet ski shop id need to change my jets and springs on the carbs which i did, cant remember which jets i fitted and the springs were the black ones, so far ive tried.. rebuilt both carbs with oem rebuild kits, new fuel lines and inline filter, new fuel tank check valve, tested the resistance on the stator which seems within specs, just done the crank seals as the front was a little leaky, checked everything in the electrics box and all seems realy healthy, tested the start/stop switch and thats good, all other wiring is good and healthy and tested with a multimeter, took off the overheat sensor to test if was that and no diffrent with that off, ive also tried tuning the carbs but with no avil, i have litrally been over everything but with no joy!! :no: could this be due to having the wrong pop off pressure? due to me changing the jets and springs? pop off is one thing i dont realy understand.. has anyone else come across this or a simular problem? anyone with any info/help please let me know!
Many thanks :bananajump:
Got some running issues with a superjet, its a 99 rn with a stock 701 engine apart from the protec pipe (mach 1) basicly runs good on trailer with no issues.. get it in the water and well first off its realy boggy off the start then all of a sudden it will clear up and be like a rocket for a while then sometimes will be boggy off the throttle again ect.. its a hard one to explain as its sometimes good then sometimes boggy.. almost like its being starved of fuel, but its so random its hard to work out what it is.. its almost as if something gets blocked up then clears.. :thinking: when the pipe was fitted i was told by a well known jet ski shop id need to change my jets and springs on the carbs which i did, cant remember which jets i fitted and the springs were the black ones, so far ive tried.. rebuilt both carbs with oem rebuild kits, new fuel lines and inline filter, new fuel tank check valve, tested the resistance on the stator which seems within specs, just done the crank seals as the front was a little leaky, checked everything in the electrics box and all seems realy healthy, tested the start/stop switch and thats good, all other wiring is good and healthy and tested with a multimeter, took off the overheat sensor to test if was that and no diffrent with that off, ive also tried tuning the carbs but with no avil, i have litrally been over everything but with no joy!! :no: could this be due to having the wrong pop off pressure? due to me changing the jets and springs? pop off is one thing i dont realy understand.. has anyone else come across this or a simular problem? anyone with any info/help please let me know!
Many thanks :bananajump:
Last edited:
so i left them in there, but the jets i had been told to use where infact the 135 main.. according to protec i should be running the 130 mains so i have put the 130s back in which were the stock ones.. i think your right about the load up it all makes sence now 
