1997 ski doo formula 3 600 triple tinging noise - Snowmobile Forum: Your #1 Snowmobile Forum
http://www.snowmobileforum.com
Go Back   Snowmobile Forum: Your #1 Snowmobile Forum > Specific Snowmobile Forums > Ski-Doo Snowmobiles


» Sponsors





Reply
 
LinkBack Thread Tools Display Modes
Old 10-11-2010, 04:20 PM   #1 (permalink)
Registered User
 
Join Date: Oct 2010
Posts: 10
1997 ski doo formula 3 600 triple tinging noise

I have a 1997 ski doo formula 3 600 and sometimes when it idols I can hear an ocational noise like a ting and it sometimes stalls. I turn the primary clutch and can hear only the weights in the clutch. I turn it slow and it feels smooth. Could it be I have old low octane fuel? Any help would be greatly apprieciated.
aaaaex88 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-11-2010, 04:42 PM   #2 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,210
Idle rpm is?
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 10-11-2010, 11:00 PM   #3 (permalink)
I just fix 'em...
 
IRONDOG's Avatar
 
Join Date: Oct 2006
Location: Clio, Michigan
Posts: 998
The bearings on the PTO end of the crankshaft are more than likely causing the noise. The phenolic plastic ball separators have probably disentegrated and all the balls are running loose between the inner and outer races. They occasionally all run together and act like a sprague clutch which locks up the bearing causing the engine to stall. I have seen this many times on SkiDoo triples. The fix is a crank rebuild. And check to be sure there is an oiling hole drilled for the pto bearings. It will be obvious if it's there or not when you remove the pto cylinder. Many were not drilled in 1997.
Jerry
__________________
They all start turning to junk as soon as you pull the rope...
www.snowmobileswapmeet.com
IRONDOG is offline   Reply With Quote
Old 10-12-2010, 08:51 AM   #4 (permalink)
Registered User
 
Join Date: Oct 2010
Posts: 10
I think the idol rpm is about 1500 but since I never made a note of it that is a guess, I could start it up and warm it up to check the idol since sometimes it doesn't make the noise. What should it be and what does rpm have to do with the noise?
Is there a visual check to see if the bearing is bad or some other way to check for sure?
The guy I got the sled from said the engine was rebuilt but I guess he could have lied to me.
aaaaex88 is offline   Reply With Quote
Old 10-12-2010, 01:55 PM   #5 (permalink)
Registered User
 
Join Date: Oct 2010
Posts: 10
Would the occational backfire make that sound? I had the exhaust off and it back fired from the middle exhaust once for the 5 to 10 seconds I had it running. Could a backfire or multiple backfires kill the engine? What would cause an intermittent backfire?
aaaaex88 is offline   Reply With Quote
Old 10-13-2010, 01:01 AM   #6 (permalink)
Mountain Man
 
lowbudget's Avatar
 
Join Date: Jan 2006
Location: Vernal Utah
Posts: 423
Pull the clutch and roll the engine over and listen for bearings clacking. That's what I got told to do on my Mach.
__________________
As Red Green says "Keep your stick on the ice." Thanks Mike
lowbudget is offline   Reply With Quote
Old 10-16-2010, 02:02 AM   #7 (permalink)
Registered User
 
Join Date: Jan 2007
Posts: 259
If the crank bearings are gone you should be able to feel the play when you pull the clutch up and down. There should be no play.
The noise could also be pinging. When the engine is running lean or the wrong sparkplug is used the gas can pre-ignight in the cylinder. The piston skirt hits the cylinder wall which makes the ping noise.
__________________
The path less taken has thy best powder!
Mrdman2442 is offline   Reply With Quote
Old 10-18-2010, 04:54 PM   #8 (permalink)
Registered User
 
Join Date: Oct 2010
Posts: 10
I sucked out most of the old gas and put in a few litres of 91 octane. I gapped new spark plugs to .018". I checked the compression when the plugs were out and I got 100, 100, and 105 psi. When I was turning over the engine I couldn't feel or hear any noise from the engine. I started it up and it backfired once then ran great with an idle of 1700 rpm.

Question; since the compression is on the low side can I use regular octane gas or should I still use premium?

I will have to assume the noise I heard was pinging due to pre ignition.

I didn't like how I had to bend the ground electrode on the spark plug to get the proper gap. It just looked wrong.
aaaaex88 is offline   Reply With Quote
Old 10-18-2010, 11:00 PM   #9 (permalink)
Registered User
 
Join Date: Jan 2007
Posts: 259
You can use regular gas.
Spark plug gap on the newer CDI igtions are usually around 0.025" - 0.030"
__________________
The path less taken has thy best powder!
Mrdman2442 is offline   Reply With Quote
Old 10-19-2010, 12:04 AM   #10 (permalink)
Mountain Man
 
lowbudget's Avatar
 
Join Date: Jan 2006
Location: Vernal Utah
Posts: 423
If your pinging was due to preignition you don't want to drop octane in your gas. My 98 Mach manual calls for high octane fuel so that's what is run in it. What quality comp tester did you use? It might be worthwhile to borrow another one and compare numbers. The reason the plugs are gapped so tight is your stator is the same as a twin stator and you are running 3 coils not 2 so spark is not as hot. Donnie over at Dootalk has hi performance coils that let you open the gap up. You can build your own with Evinrude coils but it worked out for me to be a better deal just to buys his than build my own. You can do a search over there in the Mach 1/Z tripples section for info on both.
Mike
__________________
As Red Green says "Keep your stick on the ice." Thanks Mike
lowbudget is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 12:58 AM.



Copyright SnowmobileForum.com

Search Engine Friendly URLs by vBSEO 3.6.0