What Bubba and I did this afternoon!

Well, had my snow work done this morning, Bubba was sick so he and I stayed home and worked over the 346. Actually, I did it while he slept, but he will get upset if I don't include him!!!

Much thanks to Ultra for his research, and Doc. Freak for the late night phone call and pics as well as advice

Now for the ugly, lets hear how bad it looks!!! I never did manage to check the squish, couldn't hold everything together, and got tired of fishing out solder from the crankcase!!!!
Here we go, before:

After:







Andy

Have you done a test run ??

SWE#Kipp said:

Have you done a test run ??

Click to expand...

No, Bubba woke up just as I got it all bolted together, haven't had time to even open the muffler yet!!
Andy

good job.
grease works good to hold the soilder on the piston.
or you could put vaseline on your piston.

manual said:

good job.
grease works good to hold the soilder on the piston.
or you could put vaseline on your piston.

Click to expand...

Thanks fot that tip and the kudos manual, I was hurrying, so the thought process was done ahead of time, no real plan for oopses!!
Andy

Hey Andy,

Just use a long piece of solder............hold the end as you turn over the saw.

I take 2 measurements parallel with the piston pin.

Yup, long piece through the plug hole.

Na... 2 smokes are self cleaning - it will spit out!:monkey:

Ok, Mama finally came home!!! This is my version of a Husky muffler mod:



Didn't do much, it's cold and dark outside so I only made 4 cuts in 4" Oak. I know the carb isn't uite right, but I couldn't bog it down!!! Will play with it a lot more tomorow, but so far, it seems a LOT better!!!
Andy

I take it you don't use a mesh screen when you make those small holes vs. one large exit.

Personal choice, or is there no need for a mesh screen?

IchWarriorMkII said:

I take it you don't use a mesh screen when you make those small holes vs. one large exit.

Personal choice, or is there no need for a mesh screen?

Click to expand...

I ussually go with a 3/8ths hole, but have become leary of getting crap in the cylinder. This time I went with 1/8th holes, less chance of crap. I don't cut in forestry areas, so I am not required to have a screen.
Andy

Have you ever had spark problems?


I've set a tree on fire simply from my exhaust, Im not sure if not having a spark arrester would be any worse :angry2:

Never been an issue yet, but...........................

Way to give it a go, Andy! I will be anxious to hear how it runs for you! My first attempt at porting was FUN - I learned a lot, and felt like I really gained a MUCH better understanding of the 2-stroke engine.

Josh

You are a braver man than I am, or just smarter. Glad that it worked for you, I just hate that you had to do that to your saw to get it to run to your liking. I just recently bought a super clean awsome running 026 for $140! I couldn't believe it. But I would like to try and do some mods on it, however
i'm afraid I'll royally screw it up. I have all the equipment, lathe, mill, tools, and whatever else, just not sure if I have the knowledge.

Forgive me, but I can't really tell from the pics what was done to your cylinder other than cleaning. Looks like the exhaust port was polished or maybe grinded down on the edges.

Help a poor ignorant guy out if you will. Also, explain the need for solder.

Tks
Tom

Tom, the solder is used to show how much space there is between the piston and the top of the cylinder. You place a bead of solder on the top of the piston and run the engine through one cycle by hand. Remove the piece of solder and measure the thickness. The reason he is doing that is that he is going to a thinner gasket at the base of the cylinder to increase compression a bit. Have to make sure the the piston doesn't hit the top of the cylinder when it gets running.

Mark

gumneck said:

Forgive me, but I can't really tell from the pics what was done to your cylinder other than cleaning. Looks like the exhaust port was polished or maybe grinded down on the edges.

Help a poor ignorant guy out if you will. Also, explain the need for solder.

Tks
Tom

Click to expand...

Yes, the solder is to measure the distance between the top of the piston and the bottom of the cylinder. As Oldsaw stated already, I removed the base gasket on this saw to gain compression and really needed to check it, but I figured this was an all or nothing experement so it really didn't matter that much to me!

Ok, if you look at the very first picture, the four smaller holes are the transfer ports and the webs or walls between them were about .125" thick. This is where I focused mos of my attention. I ground them down to .030" thick and blended everything in matching the original angle as best I could, I was told that is critical, but you can remove about as much as you want otherwise with little chance of detremental effect. (I may get corrected on that shortly?)
The intake and exauhst ports it is hard to tell I did do more than polish them. I found I could remove 3-4mm from the sides, about .120". I am not that brave, I took about .030" from each. I also could have raised the exauhst port and lowered the intake port 1mm, .040" I moved them around .010", very little!!!
The reasons I went this way, is the reaserch I have done shows move the ports up and down, you gain RPM, open them up side to side, more tourqe. I need tourqe from this saw, it has penty of RPM, but not the balls I wanted from it. Removing the base gasket upped the compression gaing a hair more HP as well.
I know my pictures suck, that was my phone, mama had the good camera with her and I wanted to put it together.
All this project reuired, I kid you not, was a sqrench I think a 5mm allen wrench the right gasket material, Loctite anaerobic gasket maker (O'rielly's, PA#51817) a pocket knife and a dremel with acsesories. That is all!! No offense to the builders, but I think this is 70% having an idea what you are doing, and 30% sheer luck!! I don't know that I will do another one, but I will not be afraid of it if I do want to. And as I mentioned, Freakinstang and 04Ultra where indespensable help!!!! Thank you again guys
Hope that helped a little at least.
Andy

AJLOGGER said:

You are a braver man than I am, or just smarter. Glad that it worked for you, I just hate that you had to do that to your saw to get it to run to your liking. I just recently bought a super clean awsome running 026 for $140! I couldn't believe it. But I would like to try and do some mods on it, however
i'm afraid I'll royally screw it up. I have all the equipment, lathe, mill, tools, and whatever else, just not sure if I have the knowledge.

Click to expand...

Not sure smarter had anything to do with it, just said to heck with it, mama was going to cut me off at the knees if I bought another saw!!!!!!

The reason I had to do this is mostly my fault, I NEEDED a 60cc saw, and bought this after reading how great theses saws are, to replace a 60cc saw. Not sure if the power gains are there or not yet, but so far it seems better. Waiting for it to get above 20deg outside before I go cutting.
Andy