1996 sj bogs with load on it

[Justinlowe948]

so I have a 1996 superjet the motors stock other then a factory type 9 pipe,and msd coil.
So I can run my ski at my house and it runs prefect but when it's in the water it idles fine but as soon as I give it throttle it bogs super hard and won't get out. Iv gone though the carbs 4 times now iv tried changing jets and adjusting the Jets But adjusting then in or out made it worse. I thought maybe it's a head gasket so I did a compression test its around 140 each hole. So next I checked spark so I got some new plugs just for good measure and there's good spark. No Change on the bog.

 

[Quinc]

check the reeds.

 

[Vumad]

Did you test the carbs (pop off and fuel pumps) or did you just clean them and put them back together?

 

[shaunsteezy]

try changing out that msd coil for an oem

 

[Justinlowe948]

try changing out that msd coil for an oem

It's a bran new msd coil

 

[Vumad]

You didnt answer my question. Just because you cleaned the carbs doesnt mean they are working correctly. Load on the motor changes a lot of things. Iveput in brand new sbt parts and had them leakkng, much less old ones.

 

[shaunsteezy]

so you put a new msd coil in and now it bogs when you load it up? hmmmm.... sounds like a bad coil.

 

[Vortex]

Could be a crank bearing

 

[Wizards Powersports]

If it was a crank bearing, compression would probably be much lower


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[JetManiac]

What jetting do you have?

 

[Vortex]

If it was a crank bearing, compression would probably be much lower


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This is not true it can still make compression with a bad bearing