John2189 455 #1 Posted June 26 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 67,821 #2 Posted June 26 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 67,821 #3 Posted June 26 (edited) Delete double post Edited June 26 by ebinmaine Share this post Link to post Share on other sites
moe1965 743 #4 Posted June 26 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 7,323 #5 Posted June 26 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 455 #6 Posted June 26 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 455 #7 Posted June 26 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 67,821 #8 Posted June 26 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 455 #9 Posted June 26 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 67,821 #10 Posted June 26 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 455 #11 Posted June 26 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 15,547 #12 Posted June 26 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 455 #13 Posted June 26 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 15,547 #14 Posted July 5 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
