Stihl 044 what did i do wrong? EDIT: I think It's Fixed

[Indy Red]

So after crank, bearings, seals, piston ring replacement I put the saw back together and all seemed ok, started right up but could not get idle total runtime is about 45 minutes, no wood cut just idle and a few wot.

Wanted to check everything was ok so pulled off muffler and noticed the start of a bit of wear on the cylinder, pulled it and noticed the crank is getting stuck on as best I can describe it a notch, at about 11 o clock the crank tightens right up and then releases, the crank was smooth as silk when bolted together but admit to messing with it by tapping each side after installing seals and worrying it was to tight, It was smooth before putting the cylinder on so not sure why it has done this.

The crank was a used genuine Stihl but was in good condition, I'm going to have to split the case again but wanted to ask you guys on what could of happened.

EDIT: Video on page 5

 

[Jza]

You will have to pressure test it before anything else to rule out any air leaks etc

 

[Indy Red]

Sorry should of said, was pressure and vac tested twice and all was fine

 

[ballisticdoughnut]

That notch feeling is likely the magnet in flywheel passing by the ignition coil.

 

[Indy Red]

That notch feeling is likely the magnet in flywheel passing by the ignition coil.

Bloody hell, didn't even think of that, will check, but why the hell am i getting wear on the cylinder. The piston ring gap was .012 so cannot see why it would do this

 

[ballisticdoughnut]

Are you able to post a picture of the piston? Did you replace the piston and/or cylinder or just the rings?

 

[Indy Red]

Are you able to post a picture of the piston? Did you replace the piston and/or cylinder or just the rings?

Yes will get a picture for you, It was just the rings, there was some wear on the piston before new rings but no vertical lines, just general wear

 

[lone wolf]

Yes will get a picture for you, It was just the rings, there was some wear on the piston before new rings but no vertical lines, just general wear

Dont tell me aftermarket stuff?

 

[Indy Red]

Dont tell me aftermarket stuff?

No all parts are genuine Stihl

 

[lone wolf]

No all parts are genuine Stihl

Well, how about pics of what you are seeing? How many turns out on the H and L needle jets is the carb adjusted too?

 

[Indy Red]

Well how about pics of what you are seeing?

Will post some in a bit, getting late here now so will take some pictures in daylight

 

[lone wolf]

Will post some in a bit, getting late here now so will take some pictures in daylight

The carb settings too?

 

[Indy Red]

The carb settings too?

Carb is the Walbro 15B, put a genuine kit on it as well, 1 turn out on both H/L, it would sit at 3000rpm, It would run like that a few minutes then rise to 3800rpm and then back down again and nearly stall, tried changing it on the low and idle screw but would only hold that setting for a short while. A lot of black fuel mix was coming out of the muffler as well, it was very wet inside the muffler the cylinder and piston.

 

[lone wolf]

Carb is the Walbro 15B, put a genuine kit on it as well, 1 turn out on both H/L, it would sit at 3000rpm, It would run like that a few minutes then rise to 3800rpm and then back down again and nearly stall, tried changing it on the low and idle screw but would only hold that setting for a short while. A lot of black fuel mix was coming out of the muffler as well, it was very wet inside the muffler the cylinder and piston. most likely carb problem. Pressure and vac test the saw. IDK, maybe replace the carb if the saw passes. You could try to pressure test the carb at the fuel elbow before you replace.

 

[lone wolf]

Sounds like the carb !

 

[Indy Red]

Will pressure test again but both the carb and saw passed the pressure/vac test

 

[lone wolf]

Will pressure test again but both the carb and saw passed the pressure/vac test

Carb I think!

 

[J D]

Carb is the Walbro 15B, put a genuine kit on it as well, 1 turn out on both H/L, it would sit at 3000rpm, It would run like that a few minutes then rise to 3800rpm and then back down again and nearly stall, tried changing it on the low and idle screw but would only hold that setting for a short while. A lot of black fuel mix was coming out of the muffler as well, it was very wet inside the muffler the cylinder and piston.

Check the fuel delivery side of things, if something is restricting fuel (bad filter, damaged line, blocked impulse, tank vent, etc) you may be rich initially & then running out of fuel.
Can't speak to any wear you might be seeing... as said above, we need pic's

 

[pioneerguy600]

Leaking checkvalve assembly.

 

[lone wolf]

Leaking checkvalve assembly.

They available to put in?