John2189 507 #1 Posted June 26, 2024 The threads for the spark plug stripped out so i bought a 14mm thread repair kit. Well the the plug blew out while I was mowing. So. Now the hole is too big for the 14mm threads. Why couldn’t I rethread it to 18mm or even a 7/8 threaded spark plug? Share this post Link to post Share on other sites
ebinmaine 70,897 #2 Posted June 26, 2024 I'm thinking it would depend on how thick the boss is for the spark plug threads 🤔 Do you or a friend have the capability of welding aluminum? Share this post Link to post Share on other sites
ebinmaine 70,897 #3 Posted June 26, 2024 (edited) Delete double post Edited June 26, 2024 by ebinmaine Share this post Link to post Share on other sites
moe1965 752 #4 Posted June 26, 2024 I recommend a helicoil. The kits can be found on line . Also I think most auto parts store might carry them Share this post Link to post Share on other sites
lynnmor 7,593 #5 Posted June 26, 2024 I would first look for a replacement head, and then make a decision according to price and availability. Share this post Link to post Share on other sites
John2189 507 #6 Posted June 26, 2024 1 hour ago, lynnmor said: I would first look for a replacement head, and then make a decision according to price and availability. Heads are very expensive. I don’t want to put that kind of money into it 1 Share this post Link to post Share on other sites
John2189 507 #7 Posted June 26, 2024 3 hours ago, moe1965 said: I recommend a helicoil. The kits can be found on line . Also I think most auto parts store might carry them I tried a repair kit, it blew out. 1 Share this post Link to post Share on other sites
ebinmaine 70,897 #8 Posted June 26, 2024 15 minutes ago, John2189 said: Heads are very expensive. I don’t want to put that kind of money into it What are you finding for prices? Share this post Link to post Share on other sites
John2189 507 #9 Posted June 26, 2024 1 hour ago, ebinmaine said: What are you finding for prices? 125 plus 1 Share this post Link to post Share on other sites
ebinmaine 70,897 #10 Posted June 26, 2024 3 minutes ago, John2189 said: 125 plus Have you checked with our two vendors? Brian Badman and a to z? Share this post Link to post Share on other sites
John2189 507 #11 Posted June 26, 2024 2 minutes ago, ebinmaine said: Have you checked with our two vendors? Brian Badman and a to z? I have a ezloc thread insert ordered from McMaster carr 1 Share this post Link to post Share on other sites
rmaynard 15,937 #12 Posted June 26, 2024 What type of thread repair kit did you use as mentioned in your first post? A good quality kit such as Heli-coil should not blow out if drilled, tapped, and inserted correctly. If drilled and tapped incorrectly, another type of kit won't fix it and you may have to find a replacement head. The K341 is a great engine, and even $125 is not too much to spend to make it right again. Share this post Link to post Share on other sites
John2189 507 #13 Posted June 26, 2024 15 minutes ago, rmaynard said: What type of thread repair kit did you use as mentioned in your first post? A good quality kit such as Heli-coil should not blow out if drilled, tapped, and inserted correctly. If drilled and tapped incorrectly, another type of kit won't fix it and you may have to find a replacement head. The K341 is a great engine, and even $125 is not too much to spend to make it right again. I used the kit that has 4 different lengths of inserts and the tap. I have an insert ordered that is steel and you drill and tap to 3/4-16, so this one should work very well. Its really not about the money, its just I only use the tractor once or twice a year. Share this post Link to post Share on other sites
rmaynard 15,937 #14 Posted July 5, 2024 So, did you get your insert? Did it fix your problem? Curious minds awake your answer? 1 Share this post Link to post Share on other sites
John2189 507 #15 Posted 10 hours ago On 7/5/2024 at 3:05 PM, rmaynard said: So, did you get your insert? Did it fix your problem? Curious minds awake your answer? I know this is an old thread but no the insert didn’t hold 1 Share this post Link to post Share on other sites
ebinmaine 70,897 #16 Posted 9 hours ago 25 minutes ago, John2189 said: I know this is an old thread but no the insert didn’t hold What did you end up doing to repair the engine? Share this post Link to post Share on other sites
adsm08 2,737 #17 Posted 7 hours ago Timeserts are the only things I trust for spark plug repair. These things in a pinch: https://www.amazon.com/OEMTOOLS-25647-Spark-Plug-Saver/dp/B000CMHL1C?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&smid=ATVPDKIKX0DER&gQT=1&th=1 And always always red or green threadlock on the OUTSIDE of the insert, antisieze on the INSIDE. Share this post Link to post Share on other sites
John2189 507 #18 Posted 4 hours ago 2 hours ago, adsm08 said: Timeserts are the only things I trust for spark plug repair. These things in a pinch: https://www.amazon.com/OEMTOOLS-25647-Spark-Plug-Saver/dp/B000CMHL1C?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&smid=ATVPDKIKX0DER&gQT=1&th=1 And always always red or green threadlock on the OUTSIDE of the insert, antisieze on the INSIDE. That is the style that I used with the red loctite. It didn’t hold. The aluminum must be too soft or something Share this post Link to post Share on other sites
