Stihl 044 10mm project

[Brewz]

Finally got a phone

 

[Brewz]

If all goes well I will get the degree wheel on it later today and pop the top end off to see how it looks

 

[MustangMike]

Nice looking saw!

 

[Brewz]

Stock with gasket

104/121/69

Thoughts?

 

[Brewz]

Ring gap is between .010 and .011
Is that ok?

 

[Onan18]

A little loose but still in spec.

 

[Brewz]

I am thinking of leaving the exhaust and transfers where they are and bringing the intake up to about 75

You have talked me into the gasket delete and with this done I should end up with 105/122/75

Will widen the exhaust some, square out the base of the intake some and do some work in the lowers now.

Bugger running it stock ha ha

 

[VinceGU05]

i just pulled one down that had 155psi and ring gap of 1.5mm and the other .5mm i think 4 to 6 thou is the number for fresh rings.

 

[Brewz]

These will do then

 

[VinceGU05]

Bugger running it stock ha ha

View attachment 39816

View attachment 39817

View attachment 39818

thanks the spirit!

 

[Stump Shot]

In post #82 the bottom picture of the underside of the two pistons, notice where the wings meet the skirt you can see where the manufacturer removed material to make the piston come into their weight tolerance. So could a little bit more be taken away here? Does make a fella wonder though, why Meteor did not take a little more off to make it lighter. Was that the weight they were shooting for, or is there a limit of how far up the skirt can be machined away?
As a side note, on the MS440 that was rebuilt with the original cylinder and a meteor piston this summer, the measurement from the piston pin to the top of the piston was greater with the Meteor. Was unable to do a gasket delete, like I had thought from measuring original piston. Ended up with cheap AM gasket that was a touch thinner than OEM and got squish close to goal.

 

[Brewz]

Ok, with the gasket delete and the base sanded .005 to get .018 squish I have the timing at 105/123/70

I might take the intake down to 72 and leave the timing at that.
Try and keep the intake up to get better case compression and take advantage of the low evhaust

 

[Brewz]

Went a touch lower on the intake than I wanted but should be fine
Also raised the uppers a touch and extended them back

Got 105/121/74

 

[Brewz]

Got it all back together and found this:



I suspect it's a pin from the small end piston bearing

Much swearing, pouting, sighing and more swearing followed the discovery.

Not happy!

 

[Brewz]

Well that pin was not out of the small end bearing, and I have no idea what it was from.
All I can think of it was left in the corner of the parts bin after the last saw that went through it and it was from an old pin bearing.

Got it running this arvo and damn don't it run.
Snappy, solid running saw that revs like a mutha-plucker!!!

I have not put the tacho on it yet but it was screaming and 4 stroking solid, My guess is up around 14500+

Gasket delete and a light sand of the base gave .019 squish and 170 psi which will be perfect for work saw use

I have stuck with the single port muffler but opened up the side port about 25% and put a better screen in.

I had trouble with my 064 once I ported it with a very open muffler and it came to life once I went back to a single port muffler on it. I am applying the same method to this one.
Mind you the single port is opened up plenty
I dont know why the ported saw likes less opening, but it does from what I have found.

The 2nd 044 I got has an OEM DP muffler on it so I may put the front on to see if it helps it tomorrow. If it does I will put a 2nd port on the side

I tried it with the max flow and it helped it spool up a bit but no real big change which makes me think it may want a bit more muffler

 

[jockeydeuce]

I suspect your rogue pin is from the end of the brake band.

Great build!

 

[Brewz]

I suspect your rogue pin is from the end of the brake band.

Great build!

Ahhh yes
I will check it when I get a chance

 

[Brewz]

I am really happy with it and can't wait to get it out in some timber.

I am putting my brothers 12mm 044 back together at the moment and was going to do some grinding on it for him but will leave it stock for now so I can use it as a benchmark

It's a Mahle cylinder and is running around 105/122/70 ish from memory. It's also now got a new meteor piston in it

 

[VinceGU05]

Got it all back together and found this:

View attachment 39824

I suspect it's a pin from the small end piston bearing

Much swearing, pouting, sighing and more swearing followed the discovery.

Not happy!

How many bearing rollers you put back in that 010 you did? On the big end crank.

 

[Brewz]

How many bearing rollers you put back in that 010 you did? On the big end crank.

That was an 021 and it's still in bits.
I checked them and they are smaller.

I have kept it in case I ever work out where it's from