Arctic Cat Forum banner

21 - 27 of 27 Posts

·
Registered
Joined
·
1,656 Posts
So I bought a 2003 ZL600 efi (with power valves of course) at the beginning of the season; it runs beautiful except recently it has started to bog out at 3000 rpms from a stop when you give it full throttle. If you ease into it its fine, even it its a bit aggressively. I've looked around and it seems like forums are saying its the apv servo and that its common, however I don't want to just start replacing parts so i figured I'd ask all of you that have more knowledge of the subject. I'm not familiar with sleds at all as far as working on them, this is my first snowmobile that I own and have to maintain lol so bare with me. I haven't cleaned the power valves or done anything due to not really knowing for sure where to start.
How about clean your clutches, get fresh clutch springs and a new belt with proper deflection before you start hacking into things.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #22
Cleaning the clutches I can see, however the belt is brand new and correct, however if the springs were bad than wouldn't it be boggy throughout the entire "acceleration cycle" we'll call it, seeing as the springs wouldn't be applying proper load
 

·
Registered
Joined
·
4,033 Posts
No, a broken primary spring can just cause issues with engagement and not impact higher RPM's. The clutches could probably use a good cleaning and maybe new bushings in the weights. Cat used to have a service kit that included new fly weight bushings, shims and pins for the primary. Once you get the cover off the primary, releiveing the spring, you'll be able to feel how smoothly the sheaves move on the shaft and assess if that bushing is worn and if the clutch is serviceable, or in need of replacement. The secondary could be binding, as well, and that could cause a bog. the unloaded test may indicate if the secondary is sticking.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #24
Hey everyone, its been quite awhile since I posted this but just an update; one of the power valve cables ended up being broken, I replaced both and cleaned the valves up. It runs pretty good but until we get snow I can't for sure say if that's what it was, but I'm certain that is what the issue was
 

·
Registered
Joined
·
343 Posts
HA, Found the Problem. I guess I'll call this string "NEVER ASSUME" ..So here is the Long Story... Son in Law Bought a Matching Pair of 02 600 EFI's about 3 Years ago. I went with him & test rode it at sellers house before purchase & everything seemed OK. For the most part that sled ran fine the first yr & maybe got 200 miles on it that season. Some where during yr two it started to develop an annoying slight bog off the line. We went through many of the suggestions that was /were mentioned here. I thought we had cleaned the power valves too but ??? that now. So anyhow KIds got back from Up North yesterday & Bog was now pretty much happening at any speed, It would go but you had to really feather the throttle. So in my garage it came, I was cking this string saw the comment on PV not opening till 7K & then saw the above one about sticking open. So I told the boys to Pull the Power Valves & Clean. Not thinking that was it but at least making them do/ learn something. So since they were doing the dirty part, I thought I'd ck the Cables for sync. Popped the Servo cover off & TADA ! Both cables were there, Snapped in with the retainer clip. The only problem was they were not connected to the servo. I Think the prior owner cleaned the PV prior to selling & forgot to rehook them. It worked for a while by air pressure until they got dirty. So with clean Power V, & cables hooked up its fine. Buying used---NEVER ASSUME
Ha! My 1999 Pantera does not have those new fangled power adders! Phttps://www.youtube.com/watch?v=assqs9pRZtY Please check this you tube out!
 

·
Registered
Joined
·
138 Posts
Ha, I know that story well ! I started sleddin in 1969 on a Ski Whiz 18.5 hp. A big trip was 5 miles from home. It felt like 20 miles as they were so dang slow. Like clock work pulling the choke in and out I could get it to start in 10 pulls, warm or cold 10 pulls.
 
21 - 27 of 27 Posts
Top