I am new to the site, (which is outstanding), and new to working on seadoos, I have a spx that on the trailer, starts and runs great but once I put it in the water it starts and runs great for a couple minutes then bogs down and dies. Found the black box to be cracked on top letting water in so I fixed that and still same problem. I am new to working on the skis and don't know a whole lot but I am an airplane mech and have a good mechanical understanding, any help would be great... :cheers:
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98 SPX won't stay running in water, help!!!
- Thread starter jarvis904
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I had a similar problem and it was cured by getting the correct pop-off springs in the carb(s).
Mine would start up and run fine on land, then stall in water if I started it first and backed it in. Trying to start in water would just kill the battery after so many tries.
I had done a carb rebuild and put the stock springs in. (previous owner had done mods - aftermarket flame arrester and 2.0 needle valve) so the springs needed to be different from stock.
Mark
Mine would start up and run fine on land, then stall in water if I started it first and backed it in. Trying to start in water would just kill the battery after so many tries.
I had done a carb rebuild and put the stock springs in. (previous owner had done mods - aftermarket flame arrester and 2.0 needle valve) so the springs needed to be different from stock.
Mark
Dr Honda
Well-Known Member
Well... there you go. It should be up around 150. That engine is getting tired, so any other small issue will be amplified. Unlike a car (or aircraft piston engine) without the high compression, the port timing is too aggressive to make enough torque to idle, and rev up in the water.
I would check the fuel system over... but it's still going to be low on power, even if you can get it to run in the water.
Does it still have gray or tan fuel lines? If it does, replace them with regular black rubber automotive fuel hose. The Gray hoses are known as "Tempo" fuel lines, and they don't like the alcohol in the fuel we use. Internally, they will decay, and send green goo into the carbs.
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