That's why I used the keen Sert with the 4 keys.
No way it can move.
No way it can move.
Spark Plug Stripped, Repair Stripped
- Thread starter Ando81
- Start date
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Ando81
ArboristSite Operative
I got the saw back together today and it fired up nicely. I only ran it long enough to generate some combustion temp to hopefully bake the locking compound onto the insert. I was surprised at how new looking everything was inside. All genuine parts including crank seals so I just cleaned them all up and put them back on with some new lube on the seals.
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Sent from my iPhone using Tapatalk
I have some stuff called Seal Lock Fluid Weld that I apply to valve seats before re-installing and peening and also pinning them in place on the old L head type valve in block engines. It's rated for combustion temps and creates a hard type seal as it's heated and it's rated for combustion temps.
Kinda expensive but little bit goes a long ways and it stores good in a refrigerator. I would not buy just to use on a chainsaw engine that has a stripped out thread for a spark plug sert. Probably be better off to just knuckle down and replace the jug instead of farting around with expermenting on a iffy repair job even for yourself.
Thread lock compounds do not seal better when heated, I use heat to break down and and loosen the permanent type thread lockers.
Here is a link to the Seal Lock for review:
https://www.amazon.com/Seal-Lock-Fluid-Weld-2-oz-Bottle/dp/B00XLW9N9S
Ando81
ArboristSite Operative
After some consideration I decided to replace the piston & cylinder on this saw and upgrade it to Ms390 capacity. I lubed everything well during installation and put fresh 25:1 fuel mix in it. I splashed a bit of fuel in the carb to fire it up. It ran ok but didn’t want to idle, I had to adjust the low idle mixture. It seems to be a bit sluggish when cutting but may need card adjustment due to running on different fuel mix. It’s a Chinese piston & cylinder but I installed the Stihl piston pin clips. Should I run it on a couple of tanks of 25:1 before I tune it to rev better just to lubricate everything better during the run in process?
You may be stuck with sluggish performance having replaced an OEM cylinder with chineese...
Ando81
ArboristSite Operative
After a bit of running it seems like the compression is improving. It stops very quickly when I turn it off. I’m happier with how it’s running now, however this oil pump outlet seal is very hard and leaks like a sieve. The bar gets some oil but most of it drips out under the saw around the clutch housing. I need to find a tiny o-ring to fix it.
Replace the o ring on that fitging or replace the whole thing. That should fix the leaking. The chicom kits are hit and miss. I have one in my 025 and its great. I put one in my 028 super and its a dog.
