Stihl MS 460 - any known problems or parts that break?

[peatff]

I bought a MS460 with a stripped plug hole that someone had completely mangled. I took the cylinder off and it was beyond repair but there was a new Stihl P&C on ebay so I fitted that. The carb had been messed with and I had to take the limiters off to turn the H&L screws and when I looked at the original piston the lands had broken up between the rings. 

[Muddy42]

[Muddy42]

Right so, I dismantled the saw again to pressure test the crankcase again with a proper mityvac.  I tested it every which way, its fine. The only issue was the new decomp valve was leaking again, but I sorted this by cleaning it out and greasing the threads and mating surfaces.  I'm going to have to watch that!

 

I started the saw up with 30:1 fuel and cut some firewood last night.  The saw needs a bit of tuning but otherwise works great.

 

I've learned a lot an and its very satisfying to know that I can do this.  I have a few old sentimental smaller chainsaws which have pretty beaten up and scored pistons.  Knowing this always affected my decision making "its an old saw, it might not last much longer no need to replace bar/sprocket etc."  Now I know I can fix them if they die.

[spudulike]

Glad it worked out for you. I have been through this process many times and it works fine if you make sure you also do the full inspection, tests and carb refurb/setup afterwards.

 

[Muddy42]

On 17/02/2023 at 20:39, spudulike said:

Glad it worked out for you. I have been through this process many times and it works fine if you make sure you also do the full inspection, tests and carb refurb/setup afterwards.

 

indeed, thanks for your help (and others who posted here).