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Old 12-18-2003, 08:43 PM   #1 (permalink)
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How To Test Cdi Box 780 Triple

IS there a way to test my CDI box the motor seems to lose a third of its power after running for a while
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Old 12-20-2003, 11:52 AM   #2 (permalink)
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The CDI can not be tested , but the stator and coils can . if they pass their tests and you still have an ignition problem , then its the CDI....but the stator is the most common problem.....Jari
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Old 10-26-2009, 06:44 PM   #3 (permalink)
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I have a similar problem where my 96 ultra will run great for a few minutes until you let off the throttle and it just quits. After checks, determined that there is no spark but after a few minutes I get faint spark and an little longer and its back to normal and will start great. Any ideas????
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Old 10-26-2009, 08:15 PM   #4 (permalink)
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COil or stator in that order.
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Old 10-27-2009, 12:29 PM   #5 (permalink)
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Quote:
Originally Posted by smallengineguy View Post
COil or stator in that order.
What he said. Here is a video I put together showing how to check and replace a stator. Even though it is a cat, the same principles apply for both testing and replacing:

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
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Testing Cat triple stators
http://www.youtube.com/watch?v=Uzz2NZiw3fk

Stator Testing ZR/ZL 1998-1999 500 & 600 Carburated
http://www.youtube.com/watch?v=XM3m9i6uqSw

Stator Testing ZR/ZL 1998-1999 500 & 600 EFI
http://www.youtube.com/watch?v=jbxhExP-2P0

Stator Testing Early 1990's 700 & 580 EFI with the triangular 3 prong connector
http://www.youtube.com/watch?v=jbxhExP-2P0

Jumper wire bypass
http://www.youtube.com/watch?v=GPpzQL8J9ik
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Old 10-28-2009, 05:34 AM   #6 (permalink)
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I originally thought about the coils, however I have a hard time believing that all three of them would show the same symptoms at the same time. Agree or disagree?
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Old 10-28-2009, 05:56 AM   #7 (permalink)
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Quote:
Originally Posted by 96ultra View Post
I originally thought about the coils, however I have a hard time believing that all three of them would show the same symptoms at the same time. Agree or disagree?
If you have 1 bad coil and they have a jumper wire between them (like Cats do) it can effect all 3.
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Wanted: Dead Stators PM me.

Testing Cat triple stators
http://www.youtube.com/watch?v=Uzz2NZiw3fk

Stator Testing ZR/ZL 1998-1999 500 & 600 Carburated
http://www.youtube.com/watch?v=XM3m9i6uqSw

Stator Testing ZR/ZL 1998-1999 500 & 600 EFI
http://www.youtube.com/watch?v=jbxhExP-2P0

Stator Testing Early 1990's 700 & 580 EFI with the triangular 3 prong connector
http://www.youtube.com/watch?v=jbxhExP-2P0

Jumper wire bypass
http://www.youtube.com/watch?v=GPpzQL8J9ik
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Old 10-28-2009, 12:39 PM   #8 (permalink)
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Doos don't have that jumper, besides the common ground.
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1992 Ski Doo Mach 1 original
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1998 Ski Doo Grand Touring
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