Author Topic: scored piston on a 345  (Read 463 times)

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Offline rayster

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scored piston on a 345
« on: October 07, 2013, 10:07:01 pm »
This is my first post.   I have read a lot on this site, but have not ever worked on a 2 stroke motor of any kind.   Unfortunately I purchased a pretty clean husky 345 for what I thought was a good deal.  After adding oil and fuel, I fired it up for a minute or two.  Seemed to run very well.  The next day, I went to use it and it really seemed to run "hot".  I thought, "crap it may be running lean".  After killing the ignition, it would not start again until it sat a while and cooled off.  So I spoke to my local saw repair shop, who looked at me and said, " I sure hope the piston is not scored ".   :-[

Let's say this is the case, and I did get screwed on the deal. 

1.  Is this saw worth repairing? 
2.  Will I be able to find the parts?

Thanks in advance for your advice.
I get in trouble for looking at saws.  She thinks 6 is enough, for firewood and keeping the property trimmed. ( I really like this site )

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Offline 660magnum

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Re: scored piston on a 345
« Reply #1 on: October 07, 2013, 10:09:19 pm »
Pull the muffler and look at the piston?

Parts are common
The saw is worth repairing
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline rayster

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Re: scored piston on a 345
« Reply #2 on: October 08, 2013, 12:32:59 am »
That is good to know.  I will find out the condition of the piston and post my findings.

Thank You
I get in trouble for looking at saws.  She thinks 6 is enough, for firewood and keeping the property trimmed. ( I really like this site )

Offline rayster

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Re: scored piston on a 345
« Reply #3 on: November 01, 2013, 08:49:08 pm »
I retrieved the saw back from the repair shop.  They are weeks behind had have not even come close to looking at it.

So I pull the muffler, and the screen is clean.  The cylinder wall, piston, and ring looks dang near new.  So I am thinking it needs some adjustment.  A co-worker mentioned the coil could be getting hot and failing. 

I noticed the spec sheet shows the 345 hi rpm 12,500 and the 455 hi rpm 13,500.  I could be mistaken but it really sounds like that 345 revs higher than the 455.


Your Thoughts, would be appreciated.   ???
I get in trouble for looking at saws.  She thinks 6 is enough, for firewood and keeping the property trimmed. ( I really like this site )

Offline 660magnum

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Re: scored piston on a 345
« Reply #4 on: November 01, 2013, 08:58:42 pm »
It probably just needs the carb richened up?
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline rayster

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Re: scored piston on a 345
« Reply #5 on: November 01, 2013, 09:37:17 pm »
I will give that a try.

 A lower rpm and the richer it is, but not to the point where it has no power and/or won't run?  Is that a good rule of thumb, without being able to accurately know the rpm?
I get in trouble for looking at saws.  She thinks 6 is enough, for firewood and keeping the property trimmed. ( I really like this site )

Offline 660magnum

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Re: scored piston on a 345
« Reply #6 on: November 01, 2013, 09:41:01 pm »
Us ole timers go by the two stroke - Four stroke break. If you free run the saw wide open it will four stroke (flutter). If you put the saw into the wood, it will run smooth in two stroke mode. If you lift the chain slightly the chainsaw will four stroke again.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

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We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

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Re: scored piston on a 345
« Reply #8 on: November 01, 2013, 09:49:50 pm »
This one on tuning - you can hear the four stroking in the beginning of the video

http://www.youtube.com/watch?v=5BZkB9QQTJU
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline rayster

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Re: scored piston on a 345
« Reply #9 on: November 01, 2013, 09:56:50 pm »
That's great information, thank you very much.   :)
I get in trouble for looking at saws.  She thinks 6 is enough, for firewood and keeping the property trimmed. ( I really like this site )

 

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