case 300 backfires

All non-Cub/Cadet/IH/Farmall/Case tractor and machinery discussions.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
panda
Cub Star
Cub Star
Posts: 97
Joined: Thu Dec 15, 2011 4:19 pm
Zip Code: 49910
Circle of Safety: Y

case 300 backfires

Postby panda » Fri Mar 30, 2012 2:22 pm

Would a bad condenser cause a case 300 to miss and backfire? Rebuilt dist was installed and ran for 3-4 hours then started acting up. Tried a new coil but no better. Starts when it's cold but misfires within minutes of running and get's worse as it's runs. Any suggestions? :(

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 21527
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: case 300 backfires

Postby John *.?-!.* cub owner » Fri Mar 30, 2012 9:15 pm

A condenser can cause it, but so can a worn distributor shaft. check for side play that may be causing the point gap to change while it is running.
If you are not part of the solution,
you are part of the problem!!!

panda
Cub Star
Cub Star
Posts: 97
Joined: Thu Dec 15, 2011 4:19 pm
Zip Code: 49910
Circle of Safety: Y

Re: case 300 backfires

Postby panda » Sat Mar 31, 2012 5:54 pm

Their is a new/rebuilt dis with new points and condenser in the machine. The motor was rebuilt and has not run right from the get go. Been this way for over a year. I installed the rebuilt dis because the old one had over .050 side play in the shaft and thought I had it solved. No such luck. Ran fine for two hours then started acting up again. That's why I was thinking a bad condenser. :lost:

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 21527
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: case 300 backfires

Postby John *.?-!.* cub owner » Sat Mar 31, 2012 8:18 pm

Sounds like time to look at valve adjustment and cam timing.
If you are not part of the solution,
you are part of the problem!!!

panda
Cub Star
Cub Star
Posts: 97
Joined: Thu Dec 15, 2011 4:19 pm
Zip Code: 49910
Circle of Safety: Y

Re: case 300 backfires

Postby panda » Sun Apr 01, 2012 3:49 am

That's not a bad idea. Figured they were out of play as the motor was farmed out to a rebuilder. His reply when first contacted was "it was running fine in our shop". Guess it's time to get back to basics.

Gary Dotson
Team Cub Mentor
Team Cub Mentor
Posts: 2746
Joined: Thu Aug 03, 2006 6:20 am
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety: Y
Location: OH West Mansfield

Re: case 300 backfires

Postby Gary Dotson » Sun Apr 01, 2012 7:23 am

Since your distributor is freshly rebuilt, it may have worn in a little and changed the point gap. I think I'd check that first. It could be a bad condenser, though.

panda
Cub Star
Cub Star
Posts: 97
Joined: Thu Dec 15, 2011 4:19 pm
Zip Code: 49910
Circle of Safety: Y

Re: case 300 backfires

Postby panda » Fri Apr 13, 2012 1:38 pm

Finally had time to work on the 300. Tried a new coil out of my cub and it still would not run right. Better but something was still wrong. Replaced the cond. and put a new coil on and it's running just fine. Sure feels good to get it back up and running again. Thanks for all the help. :{_}:


Return to “Other Tractors and Machinery”

Who is online

Users browsing this forum: No registered users and 0 guests