Re: 90hp sport jet trouble...
First of all post the timing at idle , Then lets start the gambit of electrical tests to check for weak spark . Also check the plug wires to be sure they are not breaking down and did you get the correct plugs in the motor and what did the old ones look like ? (post a pic of them if possible)
First of all I need to know which stator you have , black or red . Black stator will have a blue and red wire coming out from the flywheel and connecting to the switchbox , Red stator will have green/white and white/green going to an adapter and then a single blue going to the switchbox. Unless you have the CDM conversion in which case you will not have a switchbox , so post that up also.
Here are the steps for the red stator (most popular) if you have a black one post it and I will send diag and readings for it .
1. Check all grounds.
2. Check battery voltage , You need at least 10.2 to fire a CDI system.
3. Disconnect the Black/Yellow wire from the switchbox and check for power loss
4. Disconnect the yellow wires from the voltage regulator and check for power loss
5. Ohm the stator . Green/white to White/green , Post results.
6. Ohm the trigger , check each wire individually using White/black as your ground . First to brown , then to purple and finally white . Post the readings .
Do you have a DVA meter or adapter for an ohm meter ? Next test is switchbox stop circuit and stator output , both need DVA readings.
I think the above tests are probably a waste of time but they may turn something up .
