Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

Jacobson Gt14 Blown Spark Plug


  • Please log in to reply
9 replies to this topic

#1 Buddyl OFFLINE  

Buddyl
  • New Member
  • Member No: 40671
  • 4 Thanks
  • 5 posts
  • Location: Ny

Posted July 20, 2013 - 06:10 PM

Was running my gt14 when the spark plug blew out and now threads are striped in the head.any suggestions?
  • larryd said thank you

#2 boyscout862 ONLINE  

boyscout862
  • Senior Member
  • Member No: 8923
  • 9,753 Thanks
  • 7,523 posts
  • Location: N.E. Connecticut

Posted July 20, 2013 - 06:15 PM

Welome to GTT. My Snapper 1600 did the same thing. It is common with old aluminum heads. I'm going to take the head off and heli coil the plug hole. I'll do a valve lap job too because the Kohlers like their valve gap to be right on for best performance. Good Luck, Rick

 

BTW check our manuals section for 3 free downloads to help guide you and get three more tomorrow.


Edited by boyscout862, July 20, 2013 - 06:16 PM.

  • larryd and Buddyl have said thanks

#3 OkieGt OFFLINE  

OkieGt
  • Senior Member
  • -GTt Supporter-
  • Member No: 36782
  • 1,427 Thanks
  • 1,447 posts
  • Location: Oologah, Oklahoma

Posted July 20, 2013 - 06:21 PM

I used head on ebay is usually under 30 dollars, maybe just about as cheap as trying to repair the old one


  • larryd and Buddyl have said thanks

#4 larryd OFFLINE  

larryd
  • Senior Member
  • Member No: 15865
  • 724 Thanks
  • 1,058 posts
  • Location: bella vista ar

Posted July 20, 2013 - 09:11 PM

Used heads are reasonably inexpensive . I prefer this rather than helicoil

 

larryd


  • boyscout862, OkieGt and Buddyl have said thanks

#5 skyrydr2 OFFLINE  

skyrydr2

    Tractorholic

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 5032
  • 3,405 Thanks
  • 3,155 posts
  • Location: Gardner, Massachusetts!

Posted July 21, 2013 - 06:18 AM

Don't take the head off, get a thread repair kit at the parts store! Grease up the drill and tap and turn them nice and slow. The chips will stick in the grease . back out carefully and then clean off the grease from your new treaded hole. Insert the new threaded sleeve as directed and your all fixed.

Only time I am buying a secondhand head is because it was missing. mighty hard to get one used that isnt warped.
  • boyscout862, WNYTractorTinkerer, larryd and 1 other said thanks

#6 boyscout862 ONLINE  

boyscout862
  • Senior Member
  • Member No: 8923
  • 9,753 Thanks
  • 7,523 posts
  • Location: N.E. Connecticut

Posted July 21, 2013 - 06:19 AM

I've had good luck with helicoils in aluminum heads since I did a Datsun in 79. I always take the head off and use Locktite so that the coil stays in. My original set was about $12 from whitney and did about 10 holes. Good Luck, Rick
  • WNYTractorTinkerer, larryd and Buddyl have said thanks

#7 Walkinman1 OFFLINE  

Walkinman1
  • Senior Member
  • -GTt Supporter-
  • Member No: 34918
  • 713 Thanks
  • 552 posts
  • Location: Lombard, IL

Posted July 21, 2013 - 09:27 AM

Keensert's are my preference for something like this vs a heli-coil. No proprietary taps and they lock in place so no accidents by having them back out. A little more expensive per insert than heli-coils but since no special taps are needed it can be a lot cheaper if you only need a few inserts. I know McMaster-Carr has them, not sure who else might tho.
  • skyrydr2, larryd, OkieGt and 1 other said thanks

#8 Guest_gravely-power_*

Guest_gravely-power_*
  • Guests
  • Member No: 0
  • 0 Thanks

Posted July 21, 2013 - 09:38 AM

When ever I can, which is almost always, is drill and tap the head to the next size plug thread. I have never had a problem with that. I have always been able to find a heat range plug that will work. You may have to grind a fin somewhat to accommodate. To me it is easier and cheaper than buying Heli-coil kits, which do not always work.


  • larryd and Buddyl have said thanks

#9 skyrydr2 OFFLINE  

skyrydr2

    Tractorholic

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 5032
  • 3,405 Thanks
  • 3,155 posts
  • Location: Gardner, Massachusetts!

Posted July 22, 2013 - 07:31 AM

Keensert's are my preference for something like this vs a heli-coil. No proprietary taps and they lock in place so no accidents by having them back out. A little more expensive per insert than heli-coils but since no special taps are needed it can be a lot cheaper if you only need a few inserts. I know McMaster-Carr has them, not sure who else might tho.

 These are what I use as well. Heili coils don't like to stay put. And locktite isn't effective once heated to normal operating temps .(combustion temps eat it up)


  • larryd, OkieGt and Buddyl have said thanks

#10 OkieGt OFFLINE  

OkieGt
  • Senior Member
  • -GTt Supporter-
  • Member No: 36782
  • 1,427 Thanks
  • 1,447 posts
  • Location: Oologah, Oklahoma

Posted July 22, 2013 - 10:21 AM

Well this is almost like a discussion on oil, lol. Thanks for all the info


  • boyscout862 said thank you




Top