tundra with a 503 in it - 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 12-23-2012, 04:16 PM   #1 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
tundra with a 503 in it

I have a tundra which I put a 503 in it and it starts up great no problem runs smooth at idle but as soon I I start going with it it bogs at mid range and top end if tried adjusting the screw for the mixture but I'm not sure what else to try to adjust and what kind of spark plugs am I suposed to be running
vincanety is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-23-2012, 07:11 PM   #2 (permalink)
I am Spartacus
 
smallengineguy's Avatar
 
Join Date: Feb 2004
Location: Milton Mills, NH
Posts: 23,646
BR9ES plugs. It may be a belt adjustment issue.
__________________
1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month! (Lost in fire 4-7-13)
1992 Ski Doo Mach 1 original
2006 Ski Doo MXZ 500SS
1999 Ski Doo Grand Touring
1998 Ski Doo Grand Touring
Webmaster Evergreen Valley Snowmobile Club
SledNH.com Moderator
smallengineguy is offline   Reply With Quote
Old 12-23-2012, 08:22 PM   #3 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
Well I'm running the stock tundra secondary with the 503 primary clutch could that be the problem ?

Sent from my SGH-I747M using Snowmobile.com App

Last edited by vincanety; 12-23-2012 at 08:43 PM.
vincanety is offline   Reply With Quote
Old 12-24-2012, 05:30 AM   #4 (permalink)
Registered User
 
Join Date: Dec 2011
Posts: 3
clean the carbs check the fuel line for kinks
northerner1212 is offline   Reply With Quote
Old 12-24-2012, 06:35 AM   #5 (permalink)
I am Spartacus
 
smallengineguy's Avatar
 
Join Date: Feb 2004
Location: Milton Mills, NH
Posts: 23,646
Is the belt deflection good? If the belt is too loose, it won't run/backshift correctly. Clean the carbs as stated above as well.
__________________
1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month! (Lost in fire 4-7-13)
1992 Ski Doo Mach 1 original
2006 Ski Doo MXZ 500SS
1999 Ski Doo Grand Touring
1998 Ski Doo Grand Touring
Webmaster Evergreen Valley Snowmobile Club
SledNH.com Moderator
smallengineguy is offline   Reply With Quote
Old 12-24-2012, 07:37 AM   #6 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
The carb looked clean when I took it a part but what jets should I be running any way to change the needle position and would the tundra gas pump, pump enough gas or could that be thd problem
vincanety is offline   Reply With Quote
Old 12-24-2012, 11:04 AM   #7 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
K well pretty sure I figured the problen is in the points what are the suposed to be at specs cause one cylinder fireds a clutch side sparks but I'm thinking wrong timming cause the plug is always wet could someone reply to me asap

Sent from my SGH-I747M using Snowmobile.com App
vincanety is offline   Reply With Quote
Old 12-24-2012, 10:49 PM   #8 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
Nvm my other posts ill rewrite what Ive tried so far k well plugs firing on the mag side fine but the plug on the primary side is wet there's good compression on both sides and we re adjusted the points changdd the condesator and point on the primary side still no affect we switced the coils around still got the same problem on the same side any info on what to next what to check would be greatly appreciatted and thxs for the help so far
vincanety is offline   Reply With Quote
Old 12-24-2012, 10:56 PM   #9 (permalink)
Registered User
 
aduck's Avatar
 
Join Date: Feb 2010
Location: northern il
Posts: 3,187
Sounds like its in that carb needle/seet most likely not sealing and flooding that side out.

Sent from my SCH-I510 using Snowmobile.com App
__________________
93 mach1 670
02 rmk 800 162
95 powder special 580
aduck is offline   Reply With Quote
Old 12-24-2012, 11:05 PM   #10 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
The engine has single carb so how would that work?
vincanety is offline   Reply With Quote
Old 12-24-2012, 11:22 PM   #11 (permalink)
Registered User
 
aduck's Avatar
 
Join Date: Feb 2010
Location: northern il
Posts: 3,187
That changes it. Sorry. Id get an inline spark tester and check spark. And double check compression on that side

Sent from my SCH-I510 using Snowmobile.com App
__________________
93 mach1 670
02 rmk 800 162
95 powder special 580
aduck is offline   Reply With Quote
Old 12-25-2012, 05:09 AM   #12 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 31,864
There are two charge coils for the ignition.
If one is bad, you will not get spark on one side.
__________________
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 12-25-2012, 07:31 AM   #13 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
There is spark on both cylinders same nice strong spark its like If the timing would be off and we switch around both normal coils and we pyt in a new charginv coil still no go bur the thing is we had retimmed it to so I dont know what else it could be
Sent from my SGH-I747M using Snowmobile.com App
vincanety is offline   Reply With Quote
Old 12-25-2012, 10:18 AM   #14 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 31,864
Go back and check your work, possible pinched wire that is now grounding out.
__________________
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 12-25-2012, 10:36 AM   #15 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
Well the problem was the exhaust we made to fit wasn't thr right back pressure cause my 600 vmax gives me twice the power so got to try and make the stock exhaust fit

Sent from my SGH-I747M using Snowmobile.com App
vincanety is offline   Reply With Quote
Old 12-25-2012, 11:26 AM   #16 (permalink)
Registered User
 
joshkidner's Avatar
 
Join Date: Nov 2011
Location: muskegon michigan
Posts: 2,301
make the motors exaust fit in the chasis. the pipes especially are made spcifically for the motor. the pipe doesnt much matter too much. it can change the ammount of backpressure though.
joshkidner is offline   Reply With Quote
Old 12-30-2012, 07:36 PM   #17 (permalink)
Registered User
 
Join Date: Aug 2009
Posts: 88
K well I figured the problem out it was the exhaust and engine was running a 310 jet for single carb seemed way high so we put a smaller one in ran like a champ so I'm wondering is I got a mikuni carb and I'm trying to order a k&n air filter from royal distributing but can't figure out which air filter I need like what are thd specs for the carb

Sent from my SGH-I747M using Snowmobile.com App
vincanety 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 04:14 AM.



Copyright SnowmobileForum.com

Search Engine Friendly URLs by vBSEO 3.6.0