having prblems with 1996 seadoo speedster can any one help

[seadootbird]

runs good out of water but it backfires through carb at high rpms put it in water and it wont rev one engine gets maybe half throttle but no speed and bogs out the other wont hardly run at all .up i rebuilt carbs new sparkplugs @wires aftermarket airfilters and solas 15 23 impellars also put in carbon fiber 159 degree rotary valves passenger motor compression is 140 on both holes drivers side 140 in one 135 in the other it was just rebuilt year and half ago buy previus owner ??????

 

[phough5757]

A couple of questions. Is this how its running after the carb rebuild and wires with rotary valve? Was this how it was running before?
Some suggestions; Compression tests may show timing problems. After a Carb rebuild You should check the pop off level.
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Good luck and keep us posted.

 

[seadootbird]

it was the same before and after ....give me some time and check compression im taking it in tomorow to have dess keys programed maybe i can get them to check pop off presure

 

[parrothd]

"carbon fiber 159 degree rotary valves passenger" These a garbage, replace the stock ones, and make sure you have it timed correctly, it doesn't sound like you currently do...

 

[seadootbird]

i forgot to say the carbs r leaking i replaced needle valves and rebuilt carbs but still leaking i put new gold spings in them i wondering if i put the wrong ones in i found out i had primers hooked into vent line

 

[seadootbird]

i turned high side up and that helped with the backfiring but didnt cure it completly also found out i had primers in the vent side of fuel lines i changed that to but i started tuning the other motor and lost all spark to that motor i bought all new parts for that 1 waitng for new parts to arrive