Interesting, let us know how that works out if you give it a try?
Stripped head....helicoil?
- Thread starter Jason280
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IntegrityCarpentry
ArboristSite Operative
What other saws do you have? I am trying to figure out thread sizes for bpm7 and 8. Cs 490, 620 and 272xp
I found this useful reverse engineering tool on NGK's site.
Unfortunately there didn't seem to be a full match. I can get the same thread reach (12.7mm vs 9.5mm) and heat range in M14x1.25 but the resistor would be different, 5k vs 10k.
Nkw I'm not sure how big of a concern this, anyone?
I have an echo 590, Husqvarna 445, and a Jonsered 451. All are m14x.125 thread size, I could be wrong but I'm pretty sure that is by far the most common threading of plugs for small engines. Stihl just changed to that smaller m10x1.0 recently I think.
For those of you that purchased a set from @heimannm as I did. I emailed time-sert to get a price for the wrench p/n 44192m that is missing out of his kit.
https://time-serts.com/store/wrench-m14_mini/
https://time-serts.com/store/wrench-m14_mini/
Spark plug experts, could I run a 5k resistor plug where Stihl specifies a 10k plug for the 462?
Yes.
It will be less strain on the ignition system. It's not advised to go higher than what the spec OEM plug is but will work in a pinch if needed for a short duration. That would put more strain on the system.
It will be less strain on the ignition system. It's not advised to go higher than what the spec OEM plug is but will work in a pinch if needed for a short duration. That would put more strain on the system.
Found this in my journey on the interwebs. Looks interesting. Could be a solution for those off Stihl saws with m10x1.0 plugs.
https://shop.saegenspezi.de/Profess...inserts-for-chainsaws-and-other-small-devices
Under $50 shipped.
https://shop.saegenspezi.de/Profess...inserts-for-chainsaws-and-other-small-devices
Under $50 shipped.
I ordered a seat cutter wrench from Mechanics Tool & Bits, $66 shipped. Ouch
....
I believe the Husqvarna 500 series pro chainsaws use the M10 x 1 Thread. I know the 545 for sure. I'm not a big fan of the smaller plug, not performance wise. It makes it hard to check compression and it's a bummer trying to look through the spark plug hole to look at the cylinder and piston.
I don't know if you caught my post, but the wrench only cost me $36 shipped from time-sert.
That sucks! No, I didn't see that. Not much I can do about it now. Hopefully everyone else goes straight to time-sert.
bellarmine
ArboristSite Lurker
That is a real pain, stripped spark-plug threads is got to be one of the worst things to really ruin your day......
)
If I may, here's a talky video on a jury-rig solution I came up with myself that appears to work dandy:
Some background if you're interested:
Another of my hobbies is Johnson Outboards. Anyway, I stripped the threads in my Johnson 6HP I grew up with. Threads were gone, spark plugs just fell out. I noticed that the spark plugs had about say 1/2" of thread, while the hole in the cyl head had about 3/4" of thread. About 1/4"++ of unused hole. Further, I had a set of Champion L78C plugs I don't know where they came from, looked about the same as the original J6C plugs, but with longer 3/4" thread shanks.
SO, I decided, what have I got to lose - I took the pair of L78C's and screwed them right into the head! They went past the stripped area and bit right into the soft-as-butter aluminum that had never been touched, torqued them down and done. They weren't long enough to interfere with the piston, so all good. Looks like your chainsaw head has a bit of extra threads in the hole too.
I did this about 8 years ago. For obvious reasons I haven't attempted to remove the plugs since, and the motor continues to perform flawlessly, starts right up, decent power and speed. See the movie, it doesn't go that fast on my big boat, but on a lighter 12ft jon-boat it flies. The movie was made about 2014, motor still working fine in 2023.....:^)
Hope this helps someone - Cheers!~ Bellarmine
)If I may, here's a talky video on a jury-rig solution I came up with myself that appears to work dandy:
Some background if you're interested:
Another of my hobbies is Johnson Outboards. Anyway, I stripped the threads in my Johnson 6HP I grew up with. Threads were gone, spark plugs just fell out. I noticed that the spark plugs had about say 1/2" of thread, while the hole in the cyl head had about 3/4" of thread. About 1/4"++ of unused hole. Further, I had a set of Champion L78C plugs I don't know where they came from, looked about the same as the original J6C plugs, but with longer 3/4" thread shanks.
SO, I decided, what have I got to lose - I took the pair of L78C's and screwed them right into the head! They went past the stripped area and bit right into the soft-as-butter aluminum that had never been touched, torqued them down and done. They weren't long enough to interfere with the piston, so all good. Looks like your chainsaw head has a bit of extra threads in the hole too.
I did this about 8 years ago. For obvious reasons I haven't attempted to remove the plugs since, and the motor continues to perform flawlessly, starts right up, decent power and speed. See the movie, it doesn't go that fast on my big boat, but on a lighter 12ft jon-boat it flies. The movie was made about 2014, motor still working fine in 2023.....:^)
Hope this helps someone - Cheers!~ Bellarmine
thompsoncustom
ArboristSite Operative
That is a real pain, stripped spark-plug threads is got to be one of the worst things to really ruin your day......
If I may, here's a talky video on a jury-rig solution I came up with myself that appears to work dandy:
Some background if you're interested:
Another of my hobbies is Johnson Outboards. Anyway, I stripped the threads in my Johnson 6HP I grew up with. Threads were gone, spark plugs just fell out. I noticed that the spark plugs had about say 1/2" of thread, while the hole in the cyl head had about 3/4" of thread. About 1/4"++ of unused hole. Further, I had a set of Champion L78C plugs I don't know where they came from, looked about the same as the original J6C plugs, but with longer 3/4" thread shanks.
SO, I decided, what have I got to lose - I took the pair of L78C's and screwed them right into the head! They went past the stripped area and bit right into the soft-as-butter aluminum that had never been touched, torqued them down and done. They weren't long enough to interfere with the piston, so all good. Looks like your chainsaw head has a bit of extra threads in the hole too.
I did this about 8 years ago. For obvious reasons I haven't attempted to remove the plugs since, and the motor continues to perform flawlessly, starts right up, decent power and speed. See the movie, it doesn't go that fast on my big boat, but on a lighter 12ft jon-boat it flies. The movie was made about 2014, motor still working fine in 2023.....:^)
Hope this helps someone - Cheers!~ Bellarmine
Nice job seems like a super easy way to fix it if it holds up and looks like yours is.
bellarmine
ArboristSite Lurker
Thanks - Glad you like my idea Thompson! Yes it does appear to be holding up just fine after 9 years, not even any oil leaks around the plugs either, so I'm happy. Cheers!~ Bellarmine
Just arrived today. Seems pretty straightforward to use to lock an insert in the cylinder....
Few comments from reviewers over an Amazon mention the importance of applying heat to cure it, as the instructions clearly state.
Yeppers. I grabbed a 450* toaster oven from Amazon last summer just for small projects needing the heat.
I'd have to take the cylinder off otherwise I'm gonna need quite a big toaster to stick the whole chainsaw in...
Heat gun or small torch be ur friend in that case.
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