doggydon

2002 ZL 550 esr won't start no spark. Coil tested good?

smallengineguy

Did you use a spark tester? Unhook the key/kill/tether switches to be sure it's not one of those. If still no spark, CDI.

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1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month!
1993 Ski Doo Mach Z 780 triple
1999 Yamaha Venture 500 touring
2001 Ski Doo Mini Z

Assistant Trailmaster Evergreen Valley Snowmobile Club
SledNH.com Moderator

If I'm not home, CHECK THE TRAILS!

doggydon

thanks for the help. down to the cdi or the stator. does any one know how to test the cdi. what should the readings be???

smallengineguy

The stator should be a low ohm reading. Not sure what wires, though.

__________________
1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month!
1993 Ski Doo Mach Z 780 triple
1999 Yamaha Venture 500 touring
2001 Ski Doo Mini Z

Assistant Trailmaster Evergreen Valley Snowmobile Club
SledNH.com Moderator

If I'm not home, CHECK THE TRAILS!

pinlyztre

thanks for the help. down to the cdi or the stator. does any one know how to test the cdi. what should the readings be???

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smallengineguy

You can't test a CDI. only OHM a stator.

__________________
1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month!
1993 Ski Doo Mach Z 780 triple
1999 Yamaha Venture 500 touring
2001 Ski Doo Mini Z

Assistant Trailmaster Evergreen Valley Snowmobile Club
SledNH.com Moderator

If I'm not home, CHECK THE TRAILS!

kccats

Did you unplug the 4 way and test? then jump the brown/black?

Blaine1

Pretty much the only way to test a cdi is to measure the dc voltage output. The cdi converts ac voltage to dc voltage, tells the spark when to spark and sends the spark to the secondary coils. You have to have a special dc voltage gauge to read output voltage from the cdi due to the fact that the voltage is so "fast" that a normal multimeter can't read it. Out of your whole ignition suystem, the LEAST likely to fail is the CDI. 99 out of 100 times there is another issue from bad coils to bad stator to bad ground to broken/loose wires, bad trigger coil, sheared timing key (when a sled is running bad) ect.. before there is ever a bad cdi. On EFI's their ECU can go bad.

This is how you test a stator and a pulse/trigger coil. Also, check for loose wires, broken wires and bad grounds:


Stator testing out of a sled
YouTube - Stator Testing a 2 Stroke Stator


Stator testing in a sled:
YouTube - Stator Testing in a sled


Stator removal:
YouTube - Installing a Stator Pt.1 Removing it


Stator reinstall:
YouTube - Installing a Stator Pt.2 Putting Everything Back Together

Testing a pulser/Trigger coil
YouTube - Pulser Coil Testing

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