Switchback 600 ho NO SPARK - HCS Snowmobile Forums

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Old 11-01-2012, 08:28 AM   #1 (permalink)
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Default Switchback 600 ho NO SPARK

Bought a 2006 switchback this summer with a destroyed water impeller. Sleds been rebuilt from the bottom up. I mean everything...Just put it back together last night and went to fire it up for the first time and "no spark" yeeha.

-Checked all wiring connections
-Tested Stator and specs are dead on
-Plugs are good, pulled them off my gf's running cfi
-Caps are good, pulled them off the cfi as well
-Key's on/kill switch's on

The only history i know is...

-Sled was running down the trail and the temp guage hit 185 degrees so he shut it off. Everything was running before that.
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Old 11-01-2012, 12:14 PM   #2 (permalink)
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Well there is a good change there is more to that story.
Did you try pulling the plugs out but still attached to the spark boots and touch them to metal and pull the starter. See if there is any spark that way.
Are you sure it is the spark and not anything else. like fuel or your carbs?
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Old 11-01-2012, 12:43 PM   #3 (permalink)
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Guy was straight forward as can be and really didn't have any reason to lie, pistons/rings/bearing etc...were all still in good shape, so I believe him..

Grounded plugs out, pulled starter, no spark...really looking to see if anyone has dealt with this b4 I ge any deeper....is there a electronic shut off when the motor gets to hot? Possibly the computer needs to be reset?
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Old 11-01-2012, 03:28 PM   #4 (permalink)
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HI
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Old 11-01-2012, 05:03 PM   #5 (permalink)
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Kurt u got this shit figured out for me yet? Lol
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Old 11-01-2012, 09:34 PM   #6 (permalink)
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how much throttle lever gap? should be about .010. if its to wide it grounds the c.d.i. just like the kill switch does.
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Old 11-02-2012, 08:26 AM   #7 (permalink)
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Have you checked the coil? I had one fail on my wifes sled. Was intermittent at first, then went completley dead.

Specs on the coil are:

Black to White .3 Ohms
Black to Secondary Lead: Open
Plug lead to plug Lead: 15K Ohms (15k Ohms is broken up into 5k between leads, 10K for plug caps)
All values +/- 20%

Also try disconnecting the square plug next to the cdi. This will eliminate the kill switch circuit and let you rule that out as a potential point of failure.

Last edited by Anger890; 11-02-2012 at 08:30 AM.
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Old 11-02-2012, 09:07 AM   #8 (permalink)
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Todd we should check what Anger 890 listed. I'll be over tonight and check the coils like I said last night.
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Old 11-02-2012, 09:57 AM   #9 (permalink)
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Im guessing they must have changed the routing for the kill switch plug, as there isnt one next to the CDI on this bad boy....but I did find it on the mag side and I had it plugged into the thermostat sensor, and vice versus. Both the same plug, and right next to each other. Re worked those two and BAM all kinds of spark! Now i just need to tune the carbs as its running rich as shit. Also need to replace the Thermostat sensor as it tested out bad...and is giving me an error code. Thanks for the heads up ANGER! and Rick, good advice to have! Would of been too funny if that was the problem. thanks!
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Old 11-02-2012, 02:07 PM   #10 (permalink)
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Quote:
Originally Posted by IQ600cf-i View Post
Im guessing they must have changed the routing for the kill switch plug, as there isnt one next to the CDI on this bad boy....but I did find it on the mag side and I had it plugged into the thermostat sensor, and vice versus. Both the same plug, and right next to each other. Re worked those two and BAM all kinds of spark! Now i just need to tune the carbs as its running rich as shit. Also need to replace the Thermostat sensor as it tested out bad...and is giving me an error code. Thanks for the heads up ANGER! and Rick, good advice to have! Would of been too funny if that was the problem. thanks!

Glad to hear you got it figured out. For future reference the kill switch is routed through the MFD connection which is a sqaure plug with a purple center located to the right of the main CDI connection.


Looks like this:








Having volatage going ot the Temp sender may have damaged it as it only designed to read resistance.

Black & Brown Wires = Temp Sender

Black & White Wires= Coil
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