Author Topic: Aftermarket 048 piston/cylinder.  (Read 214 times)

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Offline Al Smith

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Re: Aftermarket 048 piston/cylinder.
« Reply #10 on: December 12, 2014, 09:14:15 pm »
I would almost guess 20 thou higher deck would work .Of course if every thing else is on it would throw the ex port timing back some .Which isn't much of a problem,just raise the port some .Due to the fact it's an older cousin of the 038   series I would guess stock it's around 46 thou head deck /piston and around 20-22 degree down between the ex opening and the transfers .

You know like the 038 you cut around 22 thou more or less if you shave the cylinder bottom any way if you put a can of soup to one .

I have 2 048's but you don't hear much about them .It's been said at the time they came out they had the highest power to weight ratio of it's time period. One of mine needs rings ,the other a  clutch side seal .I have the parts just don't have the time to do it right now .

Offline Al Smith

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Re: Aftermarket 048 piston/cylinder.
« Reply #11 on: December 14, 2014, 07:39:37 pm »
I did a little bit of research on this .According to what I could fish out of the IPLs' the 048 uses a 13 mm piston pin and lists the pin bearing as 13-17 -14.5 .The 064 from what I can see is a 12 mm pin ,bearing 12-17-13 .

Now the big question .Does this mean the rod small end is 1.5 mm wider on the 048 or would there be clearance  using the 12-17-13 bearing or finding a 12-17- 14.5 if they make them ?

1.5MM isn't much but if it hangs on the inside of the pin bosses that wouldn't work .I really don't know,never tried it .

Offline Eccentric

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Re: Aftermarket 048 piston/cylinder.
« Reply #12 on: December 15, 2014, 05:25:46 am »
Very good info.  Thanks guys.  I may have a good used OEM 048AV P/C coming soon.  Will measure pin width and such while I have things apart.
-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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