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  1. SMOS

    300/440/550 js550 sbn carb issues

    the spring is shiny silver,picked up a 2,0 n/s and the other 3 springs,going to replace the n/s and try the blace spring with a 95 pilot
  2. SMOS

    300/440/550 ***ULTIMATE*** 440/550 picture thread

    85 js550,widened tray,deep strake mod,trued hull,carbon fiber nose brace,jet co pipe,mariner water box,sbn 44,dual cooling,
  3. SMOS

    300/440/550 js550 sbn carb issues

    fresh rebuild,150psi compresion,1mm overbore,milled head,jetco pipe and exhaust manifold,mariner water box,stator rebuilt by jetski solutions new plug wires,and a new sbn carb,the problem is it is hard to start,when looking down carb can see fuel running into venturi,the carb has a 2.3...
  4. SMOS

    300/440/550 looking for jetting advise for a 85 js550 with a sbn

    started engine for first time after rebuild,bored 1.0mm,jetco exhaust manifold and pipe,mariner water box,and a new sbn 125 main 100 pilot 65gm spring,engine is hard to start,have to hold throttle open 1/4 to start,not sure where to start
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