Has anyone used these?

[BigRed96]

http://www.ebay.com/itm/HeliCoil-Sav-A-Thread-14-x-1-25-Spark-Plug-Repair-Kit-/320678533389
I have a MS200t cylinder that is in good shape but someone has stripped the threads in the sparkplug hole. Also, does anyone know the size and pitch of the factory spark plug hole is?

 

[jacob j.]

I've used several of those along with the time-serts. Mitch Weber has a great video on installing these:

That's part 1.

 

[firefighterwolf]

MS 200t spark plug thread size is 14 x 1.25. I've done several (other saws). Just want to make sure you keep the tap steady and straight, don't use too long of an insert, and do it with the cylinder off of the saw.

 

[67L36Driver]

Yes, work great!

 

[Duce]

Used them many times, mainly on Ford 3.0 liters, they blow plugs out of head. Just take your time and keep everything straight.

 

[BuckthornBonnie]

Yep... 2 years on an 044 so far with one of these installed. Read the directions and/or watch mweba's vid above. Good luck!

 

[BigRed96]

Cool, Thanks everybody for the replies.

MS 200t spark plug thread size is 14 x 1.25. I've done several (other saws). Just want to make sure you keep the tap steady and straight, don't use too long of an insert, and do it with the cylinder off of the saw.

Thanks for the information FireFighter!

 

[Al Smith]

For reasons completely unknown and as far as I know undisclosed Stihl has had some 441's that won't hold a plug .The fix is a heli coil type insert .If they have a problem past experience says they seldom admit it .

Having worked in the automotive engine manufacturing business for nearly 30 years about the only thing that will screw up a plug hole is an over sized reamer prior to tapping the hole .Precission CNC style taps are seldom out of specs but reamers can be if they aren't checked .One tap ran on a CNC machine can literally tap thousands of holes before it needs changed .Anything can happen though in mass manufacturing and it not get noticed for years after the fact .---chit happens ---

 

[angelo c]

For reasons completely unknown and as far as I know undisclosed Stihl has had some 441's that won't hold a plug .The fix is a heli coil type insert .If they have a problem past experience says they seldom admit it .

Having worked in the automotive engine manufacturing business for nearly 30 years about the only thing that will screw up a plug hole is an over sized reamer prior to tapping the hole .Precission CNC style taps are seldom out of specs but reamers can be if they aren't checked .One tap ran on a CNC machine can literally tap thousands of holes before it needs changed .Anything can happen though in mass manufacturing and it not get noticed for years after the fact .---chit happens ---

I have a 441 that stripped....repaired with a Helicoil .....and that stripped....
I have on 066 that the recoil threads stripped out...repaired with time serts....and they stripped.....I suck.