- Location
- Granbury, Texas
Hello, new here but working on son's 91 Yama 650 Superjet. He started having problems with it not feeling like it was powering up all the way. Then, it started bogging down when it was given full throttle. Next it would not start and after letting it sit for a while, it would start but not much power. Then, not start at all. First, went thru the carbureator and that is not the problem. We sprayed some Mercury engine tuner into the carbureator to get rid of engine carbon build up causing it to back fire, splitting the fiberglass water box which I now have to find and replace. Checked for fire at the spark plug but was not getting any. A friend had a new kawaski ignition coil for an older stand up ski which a mechanic said were basically the same. Put it on and it fired right up and thought it had solved the problem. Lowered the stand up into the water since I live on the lake, fired it up and as it was being powered up to stand up on, it died and would not start. That is where we found water leaking in from the cracked water box. Put it back on the dock and when trying to start it, it started just for a few seconds a couple of times and then would not fire at all. Checked the coil at the spark plug and again there was no fire at all. I think it is probably the CDI or Stator or possibly even the coil but as expensive as oem parts are, thought I would ask if someone might know what the problem could be and if going back with aftermarket parts would be ok since it is a 1991 ski and the oem parts are just too expensive to put in that age of a jet ski. Thanks in advance for anyone help.
