-Knock knock! -Who's there? Yep, you know it! MS650

[popopboat]

* DANGER ! *f-wordWIT POWDERCOATING *

Made myself a powdercoating gun with a 3D printer and some telfon tape.
Was about to kill myself in process... couldnt get powder to stick *s-word, gave up and came back 3 times ... Then just like that i started sticking like glued.

Some flaws present, but overall i'm extremely satisfied with end result. (top hole was my grounding, thats why paint is missing)

 

[pavel408]

Very nice result! How did you make the coating gun?

 

[popopboat]

Great success so far i guess.
Powdered recoil today, satisfied with the result again.

Very nice result! How did you make the coating gun?

ill post powdering setup tomorrow.

 

[Ford3000]

Were the cylinder studs loose when you took it apart,
looks like a well defined line at the base joint, would
have expected not to see the joint with dust oil and what
ever else settled in there.

 

[popopboat]

Were the cylinder studs loose when you took it apart,
looks like a well defined line at the base joint, would
have expected not to see the joint with dust oil and what
ever else settled in there.

To be honest, i dont remember exactly about cylinder bolts, but i dont think they were loose. (atleast 3 of them definitely werent loose)
Bent 1 and broke 2 chinese bits while removing cylinder.

But 3 crankcase bolts were loose, cheap gasket failed and poor thing has been ingesting bar oil for who knows how long... someone tried "fixing" with some kind of silicone... didnt work, only destroyed paint and gave me headache as bar oil (mixed with gasoline, literally pitch black, like from an old diesel) leaked on my whole table and all my stuff on it.

Check the piston, probably 1mm thick carbon deposits on few spots..

 

[popopboat]

Should have posted this earlier, so here you go if someone is interested to see actual knock knock.
Really struggled with the quality, beacuse of bad lighting, still bad quality but you get the point.

 

[Wonkydonkey]

That crank is well past it’s best before date

 

[popopboat]

Uh oh, this took more time to post than it should had, was too busy i suppose

This is pretty much it.



Cheap wall painter (motor identical to a vacuum cleaner) blows air through the hose and through the "flow control valve" which i 3d printed, adjusted by screwing the screw in and out.



Then through the hose into the glass jar, hose goes to the bottom of the jar, goes through the powder towards the top and carries some powder with it.



Then powder goes through the "curvy" part, plumbing PTFE tape taped with doubler sided tape on the curvy parts.
Powder gets charged by rubbing on the PTFE, works better with low humidity, less charge escapes and powder sticks better.



Tube is tapered so it fits and seals a bit better, and i can remove the parts unlike the last one which was straight all the way.

Probably most of you know this, just a short explanation.

This is the second attempt, bit better than the first one but still needs some adjustments.

 

[popopboat]

Almost completely finished, still need to make some felling dogs, just need the right material, pretty satisfied with old saw blade that i already made for husky 359 and chineso.
And AV rubber caps yes.


Spent too much time painting the letters black and then messed up, ofcourse.

Not too bad for 150$ id say.

 

[popopboat]

I've been thinking for a while about doing a gasket removal.
Soldering wire says 0.6mm of squish, gasket is thick 0.5mm therefore 0.1 mm would be insufficient right ?

 

[deye223]

.6mm is around 0.025" I would not be going much less than .5 of a mill that's about 0.020" so yes point one mil nowhere near enough

 

[Wonkydonkey]

I'd leave it as it is, if your measurements are correct.
If you double check your measurements and find your wrong, then you can always make a thinner gasket out of a coke can or beer can, and yes they are different thicknesses
0.5mm is what is recommended

 

[popopboat]

Noticed these cracks, circlip lip.
How bad?

 

[Vintage Engine Repairs]

Noticed these cracks, circlip lip.
How bad?

View attachment 283526 View attachment 283527

That’s so annoying. I personally wouldn’t use it, if chunks come flying off it may damage the clutch cover. I guess if they are just small and can be removed and it won’t affect the c clip retention then you could try that?

 

[BuckthornBonnie]

I’ve seen a couple cranks crack and eventually break off there. I’ve always been able to keep the clip on and run ‘em.

 

[popopboat]

This is a really a low hour crank

I was thinking about tack weld it, but after all how much stress does that part stand... holds a clip.
Im just hoping that whole clutch part doesnt break off as ive seen on several treads.

Like what the *f-word stihl???

 

[BuckthornBonnie]

You’re probably fine. The clutch area break is typically a user error (clutch torque, running low rakers, general abuse) or a defect. I’ve only seen one crank break at the clutch threads and that was a high hour saw.

A different style snap ring or e-clip probably isn’t needed but could be used if that breaks off.

 

[BuckthornBonnie]

Any saw can chip there, too. I have a 372 with a less than stellar crank end. It cuts wood.

 

[lehman live edge slab]

To be honest, i dont remember exactly about cylinder bolts, but i dont think they were loose. (atleast 3 of them definitely werent loose)
Bent 1 and broke 2 chinese bits while removing cylinder.

But 3 crankcase bolts were loose, cheap gasket failed and poor thing has been ingesting bar oil for who knows how long... someone tried "fixing" with some kind of silicone... didnt work, only destroyed paint and gave me headache as bar oil (mixed with gasoline, literally pitch black, like from an old diesel) leaked on my whole table and all my stuff on it.

Check the piston, probably 1mm thick carbon deposits on few spots..

View attachment 264354 View attachment 264355

Looking at this I’m wondering if this is a compounding problem that caused the rod bearing let go. Was burning bar oil because of failed gasket which caused carbon to build up to the point that it was a head slapper at times knocking the rod bearing out.

 

[Lightning Performance]

Polish the chipped area carefully and move on. Nothing more can be done to stop a fissure from forming.
Run it.