Another German.....Solo 662 Build

[awol]

I'm righ here!

This is the first page of notes, there's a couple more; I hope it's readable! I have this saw complete, but couldn't leave it alone; last couple of evenings have been spent experimenting with another version. I also have port widths recorded and will post when able to.

 

[paragonbuilder]

I'm righ here!

This is the first page of notes, there's a couple more; I hope it's readable! I have this saw complete, but couldn't leave it alone; last couple of evenings have been spent experimenting with another version. I also have port widths recorded and will post when able to.
View attachment 46351

What does cc stand for in your notes?

 

[Red97]

Gonna guess case compression.

 

[awol]

Yes, the cc denotes case compression in degrees; as a general rule, the slower the desired operating speed, the more cc is needed. My little P5000 runs ok on 19 degrees.

Stock port widths: EX 1.010; IN .949; pri. trans .404; sec. trans .511

Ported widths: Ex 1.109; IN 1.000; pri. trans .505; sec. trans .515

I still cut the squish band in a lathe; with jug bolted to plate, I first run the indicator up and down the bore and adjust the bolts to get jug square to base. Then move up to top of bore and center it. This saw had 130psi stock and I would like to see 230, so we removed .060 from squish, and .060 from base. This also left the ex. and in. close to target.


Cutting the base and cylinder extension; I like the aluminun for a mandrel.

 

[awol]

I used a spare set of cases, rod, and crank to grind the lowers out for good flow. The crank is a simple two-piece like Stihl uses. The bearings are regular 6203, and crank seals are same as a 346.



This is how I mark the jug; the blue is Dykem layout fluid, and I use an o-ring pick to make the lines. I usually only mark the ring pin locations, and trans height, and freehand everything else.



This is the carb box vent; it even has its own prefilter!

 

[paragonbuilder]

Yes, the cc denotes case compression in degrees; as a general rule, the slower the desired operating speed, the more cc is needed. My little P5000 runs ok on 19 degrees.

Stock port widths: EX 1.010; IN .949; pri. trans .404; sec. trans .511

Ported widths: Ex 1.109; IN 1.000; pri. trans .505; sec. trans .515

I still cut the squish band in a lathe; with jug bolted to plate, I first run the indicator up and down the bore and adjust the bolts to get jug square to base. The move up to top of bore and center it. This saw had 130psi stock and I would like to see 230, so we removed .060 from squish, and .060 from base. This also left the ex. and in. close to target.
View attachment 46428

Cutting the base and cylinder extension; I like the aluminun for a mandrel.
View attachment 46429

So case compression is degrees from intake closing to bdc?

 

[mdavlee]

So case compression is degrees from intake closing to bdc?

Transfer opening

 

[huskihl]

So case compression is degrees from intake closing to upper transfers opening

Transfer opening

Phyxed for clarification

 

[paragonbuilder]

Phyxed for clarification

Ah ha! That makes sense. I missed a step.[emoji12]

 

[awol]

The uppers finished, and raised up to about 120:



Finished lowers:



Exhaust port:



With a new set of Caber rings; these were for a 029 Stihl, but end gap is good so I used them.



Ready to install; I like the anaerobic sealer.

 

[exSW]

Going to have to dig out my 667 jug.

 

[awol]

The muffler mod: To much??!!



There are two different flywheels for these, notice the magnet length? They will not interchange.



I kept grinding through the trans caps, so they got filled with JB.



Compression is real good, this was after a brief run.

 

[jacob j.]

This is one cool project- looking great so far.

 

[awol]

Thanks for the encouragement Jacob, and everybody else, it's been a fun project. I think this "12 saws" deal generated a bit of interest and action!

These are the finished trans caps, side by side:



This is what Solo uses for AV mounts on these saws:



This is the experimental thumb throttle version that I took to Tennessee.

 

[awol]

Going to have to dig out my 667 jug.

Yes, that would be a very good thing to do! Pistons for these are almost unobtainable, but I think with enough machine work a Husky 365 Special piston could be used in the 667. That also would open up the opportunity to use fingers or auxiliaries if so desired!

 

[Redfin]

What is used to seal the trans caps Alan?

 

[awol]

What is used to seal the trans caps Alan?

They are sealed by o-rings, kinda like the Husky. I dabbed a little bit of sealer on those also.

 

[jacob j.]

Yes, that would be a very good thing to do! Pistons for these are almost unobtainable, but I think with enough machine work a Husky 365 Special piston could be used in the 667. That also would open up the opportunity to use fingers or auxiliaries if so desired!

If you need parts, I've got a 667 carcass that I believe has a good jug on it. I think the piston is no good though. It's got quite a few parts on it.

 

[awol]

Thanks Jacob, I'll get ahold of you when I need another project!

Here is the ported version before raising the trans to 120. This is with a completely stock carb, and air filter.

 

[MG2186]

Very informative read Allan, good job


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