slow start

[zavarce83]

I have a 99 gsx rfi and out of the water starts right away but when i put it in the water I have to give a little gas to start, also it will shut down if I take away the gas. when I push the gas all away it take some time to take off, or if I do a 180 I take time to come out of the hole. I check the wear ring and it has about 1/8 of gap in between the impelle and the wear ring.

 

[kustomkarl]

Well the wear gap wouldn't have anything to do with that problem. I would do a compression test. If the compression is low, it wouldn't have the ability to be quick because it is a 2 stroke and 2 strokes rely on high compression to operate. Here is some information on completing a compression test. You'll need a compression tester. Go to Auto Zone. I think they sell for like $25.00. The compression gage, will screw in the cylinder head in place of the spark plugs. To test compression, remove both spark plugs. Place spark plug caps on the plug cap studs near the cylinder head to ground the empty caps. This completes the circuit of the ignition electrical system and prevents any electrical problems from the caps being un grounded. Using the correct adapter for the threaded end of the tester,( same length of the spark plug threads length)Screw in the tester in one plug hole. Hold the throttle wide open. Push the start button. Watch the compression guage, when it peaks out at the most compression, let go the start button. Read the psi number. I would do it 3 times to be sure it is accurate. Check both cylinders the same way. The ideal compression is 150 psi per cylinder. If it is less, it's not a problem as long as they are close to being the same. If the psi is less than 90 it might need be time for a tear down and a rebuild. If the psi in 1 cylinder is say 140 psi and the other is 80 psi you need to tear down and repair. This difference is a lot and there is a problem. I hope this helps you.

Karl