Lisle 20020 Limited Access Spark Plug

I'd inherited a Toro z4200, and when I went to replace the spark plug it would seize halfway on entry. It still worked, but I looked at the old one and noticed it was only in halfway as well. Someone, at some point, had to of messed up the threads inside. I looked, and they were bunked. No clue what to do, I mean it worked, but it should be able to insert fully. Is this something I need to take to a repair shop? Will it cause issues? I didn't want to bore it out and use one of the kits that you had to insert the extra piece, pretty sure I'd screw that up and make things worse. So I found this tracer, and ordered it with the Loctite 37539 Silver-Grade Anti-Seize Lubricant Tube - 1 oz. as it said 'Important: Use Anti Seize" in the description. It arrived today. I removed it and the lube from their packages and put some lube on the tracer. I removed my old spark plug that was half inserted, then used a ratchet attachment on my impact drill and slowly ran this through the treads, backed it out, and ran it through again. I wiped up any excess lube, blew out the hole with an air compressor, and put the spark plug, now completely in place, back into the hole. It was that easy, maybe took 5 minutes from opening the package to having fixed spark plug threads. You're most likely not supposed to use an impact drill, but I was careful and it worked out great. That way I didn't really have to fight with it at all tugging on a ratchet. Now the mower connection with the spark plug is so good that I don't even need to put the throttle in choke to start the mower, just turn the key, even on turtle, and it's over in like half a second. This is a great product, and was worth the 5 bucks any day.

2001 maxima. 240k miles on it and the threads were terrible as you can see in the old plugs. I used some grease and slowly ran it thru the threads in the head back and forth. Id run it a few threads reverse and clean it. Repeat till I got it running smooth. then i cleaned up one of the old plugs with some copper antiseaze. Ran it thru each to get the threads in the head a good coating. then installed new plugs that went in like hot butter. I'm so happy this worked as I was scared of cross-threading and needing a Heli-coil. highly recommend this tool. Take your time do it by feel to get started. I would just turn the extension and only put a stubby ratchet on after i was able to make a few rotations with the extension alone.

I mangled the threads on my Honda compressor motor not realizing that it inserted at an ever so slight angle. This tool helped me figure that out and fix the problem well enough that my new plug went right in and it started on about the third pull. Don't forget the anti seize.

Worked perfectly on my SCAG Tiger Cub

Very easy to use and did a good job cleaning the tread. Remember to apply lots of grease and remove at lease 3 times to clean out the junk that was scrabbed off the tread of the spark plug hole. Wiped off the old grease, apply more clean grease retread the chaser into the hole. Overall, works well for me.

This is my first time chasing spark plug threads, and I initially had what seems to be a more common style of chaser ordered - the one with two different sides, and two different sizes of chasers that looks to be guided by a deep well socket - but it struck me that this style with a good socket extension might be a more accurate indication of the angle I was trying to apply it with. And that seemed to be the case when I used it in practice. Like other people have suggested, I used grease in the recesses to catch the shavings or whatever grit/carbon the chaser was catching. I cleaned that grease out of the recesses and replaced it each time for each plug hole. Very happy with my purchase. This truck has 236,000 miles on it, and when taking out the plugs - while some of them were stuck - some of them, the rear most two, were loose. I thought about this for a long time, and I feel that the prior person working on the truck to put the spark plugs in (they were high quality plugs) probably hit false tightnesses from not chasing out the threads, thought those rear most two plugs were tight enough, and finished the job that way. Over time, whatever that technician felt as being tight had worn away or melted away, and it left those two spark plugs dangerously loose. To be honest, I believe that the one plug was only held in place by being welded to the spark plug wire boot. I did not need a ratchet to remove it. So now that I have chased the spark plug threads, I feel that the spark plugs are fully seated and tight against the steel of the heads.

Excellent Product, Excellent Qualit,y and easy to use.

Works great just didn’t work for my application super durable

Quality made. Threads in perfectly and a must if the plug does not install smoothly. Thread it in with grease or some form of anti seize. Great to ensure your mating threads are clean. Not designed to cut....it cleans the threads. It is the perfect size to reach deep holes.

A must for your old Beezers, Triumphs, Nortons, Harleys, in fact anything that takes a 14 mil plug. Left my '83 Ironheads plug threads looking brand new.

Recuperó a la perfección las roscas de las bujías del 5.4 ford Tritón de mi expedition 1999

I somehow buggered the lawn mower thread hole, used this along with anti seize lubricant, tool worked well.

Saved the day on my aluminum head.