1995 Ski Doo Summit 670 bogging issues - Snowmobile World : Your #1 Snowmobile Forum
 
LinkBack Thread Tools
post #1 of 4 (permalink) Old 02-01-2019, 02:05 PM Thread Starter
Junior Member
 
Join Date: Feb 2019
Posts: 3
1995 Ski Doo Summit 670 bogging issues

With track off ground revs up and track moves freely with no issues, put it on the ground bogs at 4000 rpm's and will not get up to enough rpm's to fully engage clutch. carburetors cleaned 3 times, belt changed, fuel lines/filters in tank changed, spark plugs changed, fresh prem gasoline, HAC changed, compression checked 140 in each cylinder. Starts on first pull. One thing I have noticed is when adjusting carbs the idle screw has to be turned all the way in and bottomed out to get the idle up to 1600. Any suggestions?
brian1440 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 02-04-2019, 07:48 AM
Senior Member
 
SnoKing's Avatar
 
Join Date: Mar 2002
Location: Pence WI
Posts: 574
Send a message via Yahoo to SnoKing
Check 2ndary clutch. . A weak or broken spring there will allow clutch to function o.k. when no load (while track suspended) but under load not enough tensi0n and belt sucked down in clutch so the ratio doesn't have enough torque to move sled. and bogs engine.

It's cheaper to replace the decals, then build up a little sled. The first time I drove a snowmobile was 7/4/72. It was a 71 488 Polaris Charger.
Previously owned sleds:
1970 433 Polaris.Mstng, 2013 MXZ 600 ACE
1974 530 Cust II, 2012 MXZ XR 1200
1975 SS250, 2014 900 A RENE ADREN
1976 TX 440
1978 TXL 340
1979 TXL 340
1979 Cent 500
1980 TXL Indy
1981 Indy 500
1984 600 LE
1986 Trail Indy SP
1986 600 SE
1988 400 SKS
1989 Indy 650 ( 3)
1990 Original RXL
1992 500 EFI SKS
1993 RXL SKS
1995 RXL
1997 Ultra Touring
1998 Indy 500
1998 500 Classic touring
2001 800 XC/SP (2 )
2002 550 Classic
2002 800 XC/SP
2002 800 Vertical Edge
2005 900 Fusion
2006 600 H.O Fusion
2006 900 Fusion
1974 440 Electra
2008 600 CFI LX
2008 FST LX
2008 D700 RMK 163
09 D600 Swbk
11 Pro R 600
SnoKing is offline  
post #3 of 4 (permalink) Old 02-04-2019, 06:48 PM Thread Starter
Junior Member
 
Join Date: Feb 2019
Posts: 3
1995 skidoo summit 670 I just looked at my belt on my secondary clutch and it's riding about 1/2" from the top of the sleave and it's my understanding it should be flush or a 1/16" above the sleave. I also noticed I only have 2 set screws whereas there should be 3 set screws so 1 set screw must have fell out. So I'm assuming this could possibly be my problem the belt riding too low? Would it be like trying to take off in 4th gear in a vehicle with a manual transmission? Thank you
brian1440 is offline  
 
post #4 of 4 (permalink) Old 02-05-2019, 01:26 PM
Senior Member
 
SnoKing's Avatar
 
Join Date: Mar 2002
Location: Pence WI
Posts: 574
Send a message via Yahoo to SnoKing
That is a good "rough" analogy.




In this static condition you should only have about 1 inch slack if you run a straight edge across the top of the belt and push down slightly in the center of the belt.



You said you changed the belt so I'm assuming this is a new one and proper length etc? If it is too short or long that will also add to the bad gear ratio. I would bet that the 2ndary spring is either broke or badly fatigued and needs replacing.

It's cheaper to replace the decals, then build up a little sled. The first time I drove a snowmobile was 7/4/72. It was a 71 488 Polaris Charger.
Previously owned sleds:
1970 433 Polaris.Mstng, 2013 MXZ 600 ACE
1974 530 Cust II, 2012 MXZ XR 1200
1975 SS250, 2014 900 A RENE ADREN
1976 TX 440
1978 TXL 340
1979 TXL 340
1979 Cent 500
1980 TXL Indy
1981 Indy 500
1984 600 LE
1986 Trail Indy SP
1986 600 SE
1988 400 SKS
1989 Indy 650 ( 3)
1990 Original RXL
1992 500 EFI SKS
1993 RXL SKS
1995 RXL
1997 Ultra Touring
1998 Indy 500
1998 500 Classic touring
2001 800 XC/SP (2 )
2002 550 Classic
2002 800 XC/SP
2002 800 Vertical Edge
2005 900 Fusion
2006 600 H.O Fusion
2006 900 Fusion
1974 440 Electra
2008 600 CFI LX
2008 FST LX
2008 D700 RMK 163
09 D600 Swbk
11 Pro R 600
SnoKing is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Snowmobile World : Your #1 Snowmobile Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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

 
For the best viewing experience please update your browser to Google Chrome