Author Topic: Mac super 250  (Read 844 times)

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Offline Eccentric

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Re: Mac super 250
« on: December 17, 2013, 12:27:06 am »
Hi all
Does anyone know if all of the Mcculloch super 250s were 87ccs?
I have heard that some of the earlier models were 80cc.
Thanks

In several discussions...........there has been conflicting info.  Supposedly some of the 'yellow top' Canadian made Super 250's were 80cc.  Whether they had the same porting as the 87cc Super 250's...........I don't know.  I do know that an 87 S-250 has a LOT more beans than a 'regular' 250.  Much more than 7cc worth.  An 87cc S-250 has more 'snap' than an 87cc 300, despite being basically the same saw.  Must be down to port timing/shapes.  My 87cc Super 250 is one of my favorite saws.
-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.

 

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