some advice before I go to my local dealer in the morning.

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spacemule said:
Can you clarify? You mean slow it down by richening the high speed jet, right? You're not talking about using less throttle, are you? I've been told several different times that modern chainsaw carburetors are not designed to be run at less than full throttle.
Click to expand...


Yup

Richen it up some so it can't run full steam. Lakeside had a good thread about milling and he explained all the in's and out's of making long sustained cuts.

I always thought a rich running saw ran hotter than one tuned just right. Lake proved otherwise when it came to milling and long long sustained cuts. He claimed he richened his 660 to the point it sounded like it was choking when milling. He showed some pics of the cylinder after hours of milling, the cylinder looked brand new. He knows what he is talking about.
 
Update on the 50cc Dolmar Saw.

Update on the 50cc Dolmar Saw.

Just got back from the dealer this morning and to my saw lives on! No thanks to my abuse.
The dealer checked the fuel and said it looked old and too lean. I confessed it was two months old but did not tell him that I was running STIHL HP Ultra synthetic oil in it. I don’t know if that made the fuel look leaner then say the Dolmar oil would have? Anyways he dumped the tank and added fresh fuel fired it up and adjusted the idle a bit and the saw purrs like new again.
That was a close call. Feel free to add any comments to my list of chain saw sins that I have committed I am not so proud to say I am still a rookie.

1. No long sustained cuts at WOT.
2. Only use fresh fuel even if it means running the excess in my work truck?
3. Never work the saw with a dull chain.

Thanks for all your help.
 
I like to run all my saws a little on the rich side. If I don't hear the occasional four stroke burble in the cut, I usually richen them up just a tad. I can honestly say that In all my years of messing with OPE, I have never had a lean seizure. I always use fresh gasoline and good oil. No muffler screen problems or carbon build up in my stuff.

I don't have a tach. I've been thinking about investing in one. I will still set the RPM's a little lower than stock. Maybe I'm missing out on some power, but it has worked well for me.
 
Dale.Z said:
...he dumped the tank and added fresh fuel fired it up and adjusted the idle a bit
Click to expand...
Did he pull the muffler and look at the piston and cylinder ? I would, just for peace of mind. It'd only take 5 minutes. No, it won't void your warranty.
 
Brian VT said:
Did he pull the muffler and look at the piston and cylinder ? I would, just for peace of mind. It'd only take 5 minutes. No, it won't void your warranty.
Click to expand...



:agree2::agree2:

It can't hurt to be sure.

Old fuel, and by old I mean anything that just doesn't run well, can give terrible performance. The reason I qualify what I mean by old is that I've had stuff that seemed junky in a month. Other stuff has sat in the can for months and started and run fine. You work with it enough and you get a feel for what condition gasoline is in.

Normally I go through plenty so I never see stuff even a month old from the bulk tanks. But when you have more trucks than you need and each truck has it's own set of cans, pretty soon you use a truck that has been parked for three months and the cans have "old" mix in them.


Mr. HE:cool:
 
are you sure he only adjusted the idle? If he didn't check the high, I'd be concerned the problem is not solved, only masked by a smoother idle. but what about mixture in the cut?
I agree on the muffler/piston inspection. That tells you if damage happened in the past. and I'd make sure it is set right on the top end to prevent damage in the future.
 
Dale.Z said:
Update on the 50cc Dolmar Saw.

Just got back from the dealer this morning and to my saw lives on! No thanks to my abuse.
The dealer checked the fuel and said it looked old and too lean. I confessed it was two months old but did not tell him that I was running STIHL HP Ultra synthetic oil in it. I don’t know if that made the fuel look leaner then say the Dolmar oil would have? Anyways he dumped the tank and added fresh fuel fired it up and adjusted the idle a bit and the saw purrs like new again.
That was a close call. Feel free to add any comments to my list of chain saw sins that I have committed I am not so proud to say I am still a rookie.

1. No long sustained cuts at WOT.
2. Only use fresh fuel even if it means running the excess in my work truck?
3. Never work the saw with a dull chain.

Thanks for all your help.
Click to expand...

Awwww things turned out great. Good to hear all went well,:cheers::cheers:
 
Dale.Z said:
OK couldn't stand it any more so between jobs I went and pulled the muffler. And yes they did check the high side and said that it is set at 14,400 rpm's.

What do the picture tell?

http://picasaweb.google.com/szarmack/SickSaw#
Click to expand...

If what I'm seeing is right you got a scored piston there. The left side, or right side looking thru the port looks scored bigtime. Can you take a little closer pic?
 
Yup it had a HOT Supper...... It is in need of a new piston and maybe cylinder as well?

attachment.php


Scott
 
Last edited:
No more pic's I put it all back together. Your right THALL10326 I ran an ice pick across it real gently and it’s scored. Not sure what my next step should be with this new found info.
 
Dale.Z said:
No more pic's I put it all back together. Your right THALL10326 I ran an ice pick across it real gently and it’s scored. Not sure what my next step should be with this new found info.
Click to expand...

Well schit happens, not the end of the world. It can be repaired...
 

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