I have an kawaski 440 jet ski and how much oil does it take in the gear box and what kind

check plugs are good , is there a spark at both plugs and make sure both are to earth as they spark at the same time known as a waisted spark coil ? remove plugs from caps and put a metal rod of some sort in them and hold against your hand and crank engine and you will feel a slight voltage if working ! wont hurt you !! if no remove caps and repete ! if no check kill switch isnt stuck or corroded etc ! P...

bendix gear stuck or broken !

Your 750 jet ski does not have a gear box. If you are referring to what looks like a filler cap on the front of the motor, that is the generator/flywheel cover and it is a dry compartment and should remain that way.

To get access to the starter you will probably have to lift the motor out of the machine. Most Kawaski hulls do not give you much room to work. When you take the exhaust off you may have enough room to unbolt the starter.

Standard Thread , unbolt counter clockwise.

Sounds like this bike sat for a while. When carburetors sit, the jet's inner diameter shrinks slightly from oxidization/micro-corrosion, and the diameter of the needles that go through them grows for the same reason.

Replace the jets and the needles that go through them.

I had this problem with a Suzuki GS850. When I fixed it, I treated the bike as I had been before I fixed it on the test drive, and almost launched myself off the back of the bike when I first opened the throttle. Careful.

You can look up part numbers and study parts diagrams at Kawasaki.com. By comparing the pictures to what you have you can see if you are missing anything.

first have you done what is necessary for that such as draining the oil (unless it's a two stroke) draining the gas and refiling it with fresh gas and a couple bottles of gas line antifreeze (it sucks up water) ... for the electrical parts ... spray them with wd40... that will force out any moisture at all and oil does not conduct electricity.

it is a 3cylinder 2 stroke motor. Just use 2 stoke oil. Also when done riding hook up fresh water hose and flush. also spray motor down with wd-40. Just a nice thick coat after every ride. It does WONDERS>