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It is oil injected and if it has been sitting for a long period of time the oil will seep into the intake. This is common on older watercraft. When you get it initially started it will make a huge cloud of smoke and take a few minutes to clear up( burning the excessive amount of oil)
this jet ski has over 300 hp so should go much faster than this , but now it does have a few features /items that others do not have , one feature in particular that comes to my mind after hearing your description is its smart learning operation mode , or simply refered to as SLO Mode its activated by operators choice of key , do you have a red/blk key or a blu/blk key in the dash ?
since its engine is supercharged there are some other causes that could produce a power loss id consult a watercraft tech for more details as this machine is loaded with diag tech stuff to help a tech figure out whats wrong with it quickly
Blue smoke from the exhaust typically indicates oil is being burned in the combustion chamber. The term blow-by refers to engine oil being pushed by the piston rings or through the valve guides. If the problem is severe, an engine re-build or engine replacement is in order. After a few miles of running, the oil has had a chance to warm up, which makes it thinner in viscosity.You may try switching to a higher viscosity oil -10-40 weight, etc. Also, there are additives sold on the market for the purpose of sealing off piston rings, etc. You can also try one of these products. Good Luck !!!!
I had a similar experience with that model. It turned out to be a mouse nest in the water box. However , in this case i think you just have some moisture corrosion on the rubber tipped needle in the carburetor. Clean that part of the carb and do not alter the tiny spring in any way. If that does not work open the electronics box, if it is wet , dry it out , and seal it back up. Those are the three things I know of that will cause your problem. Start with the carb.
so, can you tell me what kind of carb was on the bike before? was it factory? and what kind of carb was just installed? blue smoke can be caused by burning transmission oil or a rich fuel mixture. that might be a bad crank seal or case gasket, or just improper fuel/oil ratio or improper jetting. black smoke on the other hand is usually caused by too much gasoline burning, but if there were enough gas entering the engine to cause black smoke, the bike probably wouldnt run at all. but, if you can give me more info on the carb swap, and if possible any jetting information or jetting changes, thenI can definitely tell you what your problem is.