Author Topic: 2300 blow back thru reed valve.  (Read 646 times)

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Offline Eccentric

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Re: 2300 blow back thru reed valve.
« Reply #10 on: March 13, 2014, 05:47:45 am »
Look up "boost bottles" for lots of reading regarding reversion, charge inertia, and other things in two-stroke engines.  They were used on many 2-stroke motorcycles in the 1970's and 1980's...
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline 3000 FPS

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Re: 2300 blow back thru reed valve.
« Reply #11 on: March 15, 2014, 06:05:15 pm »
Ok I have fixed my blow back problem today on the 2300.    I have worked on enough of these things to know when it is excessive and when it is not.   
The first thing I did was to pull the reed assembly out of the saw, take the reed off and put a straight edge against the plastic.    I could see a small amount of warping, so I cut a small piece of a file off so it would fit and filed all the surfaces flat.   
Then I noticed the carb sits right above the reed valve and decided not to over tighten it thinking it could be distorting the plastic.

I see absolutely no blow back through the carb now.  The saw also idles better.
PP 505, 475, 445.

Offline 660magnum

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Re: 2300 blow back thru reed valve.
« Reply #12 on: March 15, 2014, 06:11:16 pm »
+1
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 fossil

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Re: 2300 blow back thru reed valve.
« Reply #13 on: March 15, 2014, 07:48:48 pm »
Good going Roger!
Tim

Offline 3000 FPS

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Re: 2300 blow back thru reed valve.
« Reply #14 on: March 15, 2014, 08:17:42 pm »
Thanks guys.   Sometimes a little feedback makes me put the thinking cap on.   

When I was working and when any of us came across a tough problem, we always started discussing it with fellow workers to try and get fresh ideas.   It works.   
PP 505, 475, 445.

 

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