1998 90 hp 2 stroke with no spark.

I'm involved with the repair of the above engine.
The engine was running fine, then left for 3 weeks.
After the 3 weeks the engine was tried and it did not fire at all.
The following has been checked:
emergency stop (appears OK)
coils (work on a different engine)
sensors under the flywheel have a measurable resistance
I'm not certain what to expect from the electronic control unit.
I'm hoping that someone could help with the following:
the resistances to expect from the sensors & coils under the flywheel
How to test if the electronic control unit is working.

I'll get you some numbers tomorrow. You are probably looking at a charge coil. Resistance tests don't always tell the story though.

Thanks for your efforts I'll look forward to seeing them.

Low speed charge coil brown-red wires, 80 ohms. High speed coil red - blue wires, 240 ohms. Pulser coil w/r-w/b, 300 ohms, only fires cyl 1&3. Crank position sensor, 197, fires # 2. All coils are infinity to ground, check on K or meg scale to ground.

Thanks for the information.
I'll check the values.

To PBRMANThanks very much for your efforts. It looks as though the red / brown coil ha dad it.

Glad to help.

Hi
Thanks for the help in solving our problem. It turned out that both coils were down. The 80 ohm coil being 18 ohm & the 240 ohm coil not showing a fault. I think the insulation on the coil had given up the ghost which will not show up on a resistance test.

Right on. Good to get the feed back. Don't always hear back whether or not the diagnosis worked out or not.