A friend ask me the help him fix his 98 Arctic Cat Powder Special 600. It ran last spring when he sheaded it and now has no spark.
It uses a NO ignition system so we unplugged the harness at the engine to eliminate the kill switch, key switch, throttle safety, carb sensors and still no spark.
External coil tests good. Grounds on the stator and CDI are good.
My question is what should I read on the two trigger connections and the four wire connector that goes to the CDI.
By the way, the lighting coil works the lights when the rope is pulled so I know that the magnito is ok.
Any input would be helpful or a online site with diagnostics for a machine this new.
AC 600 Spark problem
AC 600 Spark problem
Todd Schrupp
Milbank SD
Milbank SD
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ICCSF 108
- Posts: 4369
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- Real Name: Kenny Heins, AKA Grumpy
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Re: AC 600 Spark problem
Todd, I'm not so sure you can unplug it at the engine anymore like you could on the older sleds you might have to eliminate one thing at a time, & then look out that some of the switches aren't an open/closed loop.
I would check the carbs sensors & then the throttle switch.. ( that could be a throttle positioning sensor )?? also I think that is a sensor on the air box also.. Some of those Cats have the control module in the air box..
Kenny
I would check the carbs sensors & then the throttle switch.. ( that could be a throttle positioning sensor )?? also I think that is a sensor on the air box also.. Some of those Cats have the control module in the air box..
Kenny
AKA: Kenny, Grumpy, Mr. Richard Head
"I Hunt For it, Purchase it, Haul it, Sometimes Repair it, Sometimes Break it, Then Fix it Again, Label it, Warehouse it, Talk About it, So NOW, HOW Can I Take Any Less $$ For It?"
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"I Hunt For it, Purchase it, Haul it, Sometimes Repair it, Sometimes Break it, Then Fix it Again, Label it, Warehouse it, Talk About it, So NOW, HOW Can I Take Any Less $$ For It?"
"God I love the smell of KLOTZ in the morning, That smell, you know that Gasoline/Oil Smell, MAKES the whole place SMELL like.. LIKE VICTORY. You know someday the 2 strokers are gonna end..."
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JDXspec
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Re: AC 600 Spark problem
The few early 90s A/Cs I've worked on required you to complete the circuit to run. disconnecting it isn't enough but you need to jump the wires together. 
Own 74 295/s, 75 340/S, 800, 76 440 Liquifire, 300, Liquidator (3), 78 440 Liquifire, 340 Liquifire CC, 80 Liquifire, 82 Trailfire LX, 83 Sprintfire 84 Sportfire
Re: AC 600 Spark problem
There is a sticker on the airbox that reads "The ignition system on this machine is the normally open type".
Just for poops and laughs I did test the kill/safety loop and all that works. Even will it all plugged in it still has no spark.
This is not an EFI model.
Is there any website that has Cat service manuals that can be read?
Just for poops and laughs I did test the kill/safety loop and all that works. Even will it all plugged in it still has no spark.
This is not an EFI model.
Is there any website that has Cat service manuals that can be read?
Todd Schrupp
Milbank SD
Milbank SD
Re: AC 600 Spark problem
Todd,
This online manual is for an 01, but one would assume they are similar? It has everything you should need except the chapter you really need, the engine electrical chapter.
Apparently, that is a supplemental manual for that. 
Maybe you will be able to find something useful in it.
DE
http://www.snowmobileforum.com/arctic-c ... nline.html
This online manual is for an 01, but one would assume they are similar? It has everything you should need except the chapter you really need, the engine electrical chapter.
Apparently, that is a supplemental manual for that. Maybe you will be able to find something useful in it. DE
http://www.snowmobileforum.com/arctic-c ... nline.html
Dustin Elder
Salem, OH
Midmounts.... Lots and lots of midmounts...
"Everyone is entitled to be stupid, but some abuse the privilege."
Salem, OH
Midmounts.... Lots and lots of midmounts...
"Everyone is entitled to be stupid, but some abuse the privilege."
Re: AC 600 Spark problem
This one is good from 90 to 98. Should have everything you need this time. You have to download it. It is 500 pages so it takes a little while. When you open it up, you will be asked for a password. The pasword is sled. Hope this helps
DE
http://www.snowmobilefanatics.com/forum ... splay.aspx
DE
http://www.snowmobilefanatics.com/forum ... splay.aspx
Dustin Elder
Salem, OH
Midmounts.... Lots and lots of midmounts...
"Everyone is entitled to be stupid, but some abuse the privilege."
Salem, OH
Midmounts.... Lots and lots of midmounts...
"Everyone is entitled to be stupid, but some abuse the privilege."
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guitardude081
- Posts: 989
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- Real Name: Jack Durand
- Location: Brainerd, MN
Re: AC 600 Spark problem
Pull out all 3 carb slides. There will be a magnet in them that has to line up with sensor on the outside of the carb body. Check to make sure that all 3 magnets are sitting in their reliefs. The other thing to look for is on the throttle lever. There are 2 clear spacers that must be in good shape and provide no slop for the throttle lever. If you're riding a newer Cat and the engine keeps cutting out, replace the 2 clear plastic spacers, and most likely the problem will go away. There really aren't any common electrical issues associated with the ZRT motors. Make sure that your pickup coil (Trigger Coil) ohms out good as well. It should be around .8 ohms. My money is on the throttle safety system acting up. They are a pain in the butt. There is a way to bypass the whole safety system, and even a Cat part that will plug into your wire harness, but I wouldn't recommend deleting a safety system.
~Jack
~Jack
Owner, Durand Motorsports
1980 Trailfire 340 (Grandpa bought new)
1983 Trailfire LX
1982 Spitfire (Grandpa bought new)
(3)1974 295/S
1975 340/S
(2) 1978 Liquifire
2003 Ski Doo Renegade 600HO
1993 Polaris XLT Special with AAEN pipes
2020 Polaris Indy 600 XC 129 40th Anniversary Edition
1980 Liquifire (currently in pieces)
1980 Trailfire 340 (Grandpa bought new)
1983 Trailfire LX
1982 Spitfire (Grandpa bought new)
(3)1974 295/S
1975 340/S
(2) 1978 Liquifire
2003 Ski Doo Renegade 600HO
1993 Polaris XLT Special with AAEN pipes
2020 Polaris Indy 600 XC 129 40th Anniversary Edition
1980 Liquifire (currently in pieces)
Re: AC 600 Spark problem
Jack this is a 600 twin if that makes any difference. I understand the Cat throttle safety system. And I know about the plastic washers.
However there is that stricker on the air box that says NO. I have to assume that the sticker is there to remind mechanics that this sled is different from most Cats in that era as Cat changed from NO to NC back in 79.
The emergency bypass connector is missing from this toolkit which makes since as this is a NO system. A guy needs that plugin with a NC sled or you will have a long walk home.
It appears that the trigger is universal from 1992-2007. I am thinking CDI failure at this point but i have not looked over the guide that Dustin supplied yet.
I did note a second set of wires on the side of the two carbs. One pair is the saftey switches but what is the second set for?
Some type of preheater?
Thanks for your input.
However there is that stricker on the air box that says NO. I have to assume that the sticker is there to remind mechanics that this sled is different from most Cats in that era as Cat changed from NO to NC back in 79.
The emergency bypass connector is missing from this toolkit which makes since as this is a NO system. A guy needs that plugin with a NC sled or you will have a long walk home.
It appears that the trigger is universal from 1992-2007. I am thinking CDI failure at this point but i have not looked over the guide that Dustin supplied yet.
I did note a second set of wires on the side of the two carbs. One pair is the saftey switches but what is the second set for?
Some type of preheater?
Thanks for your input.
Todd Schrupp
Milbank SD
Milbank SD
Re: AC 600 Spark problem
Dustin I did the down load and have the password but what is the login name I need to use?
Todd Schrupp
Milbank SD
Milbank SD
Re: AC 600 Spark problem
Todd,
When you open the link i posted, click on the BLUE download bar. Not the GREEN download bar. i did that the first time too. let me know if it works.
DE
When you open the link i posted, click on the BLUE download bar. Not the GREEN download bar. i did that the first time too. let me know if it works.
DE
Dustin Elder
Salem, OH
Midmounts.... Lots and lots of midmounts...
"Everyone is entitled to be stupid, but some abuse the privilege."
Salem, OH
Midmounts.... Lots and lots of midmounts...
"Everyone is entitled to be stupid, but some abuse the privilege."