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#Post#: 317--------------------------------------------------
254 piston options
DIR By: Old Iron Logging
Date: February 28, 2011, 5:57 pm
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Anyone know of better piston options for a 254? Starting to
build a play toy.
#Post#: 377--------------------------------------------------
Re: 254 piston options
DIR By: Spike60
Date: March 1, 2011, 9:24 pm
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OEM is still available. Tecomac made a real nice one if you can
find it. There is a Forester one available also as an
inexpensive alternative. I just put one of those in a 254 myself
a couple weeks ago and it's working fine.
One area to mess with is the gasket. There were two gaskets
available, (but may only be in the 262 IPL). One was 2mm and one
was 1mm. I'm not sure if the 1mm gasket is still available or
not. (I'll check cause I need one for mine) I tried to go with
no gasket and use 1194, but the piston was hitting up top so I
had t scrap that idea.
#Post#: 406--------------------------------------------------
Re: 254 piston options
DIR By: hamish
Date: March 2, 2011, 6:50 pm
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As I mentioned over at another place, check your squish, I used
some aluminum stock for a base gasket, but dont remember the
exact measurement, as Spike mentioned there are two different
base gaskets, but if you are lucky as I was, the squish with the
thinner oe gasket still has some play room. MY 254 is out on
loan till mid spring, if it was here I would have taken it apart
and got some measurements.
#Post#: 409--------------------------------------------------
Re: 254 piston options
DIR By: Old Iron Logging
Date: March 2, 2011, 7:25 pm
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The 154 had plenty of squish and the best com chamber. Squish
tightened as model years progressed and com chamber expanded.
Best modern cyl I had was a 2000. Tight squish and small cc. We
have a 0-55cc gas class. 254 is pretty much the top saw except
for cheater Partners. Alot of good 10mm pin pistons in 45mm, but
254 has 12mm pin.
#Post#: 648--------------------------------------------------
Re: 254 piston options
DIR By: Spike60
Date: March 7, 2011, 8:50 am
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Turns out there 3 possible base gaskets. Original was .7mm, and
there was a service bulletin when it went to 1mm, for "better
combustion and idling".
The .7 is NLA. The 1mm is #503704801, and the 2mm is #503704802.
There's also a choice of 1mm and 2mm gaskets on the 242's.
#Post#: 3812--------------------------------------------------
Re: 254 piston options
DIR By: Chainsawrepair
Date: August 18, 2011, 9:01 am
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--- Quote from: Old Iron Logging link ---
>
> Alot of good 10mm pin pistons in 45mm, but 254 has 12mm pin.
>
--- End Quote ---
I was just wondering about the pin size of 254 piston. Thanks
for posting that info back then Art.
Least now I know the search feature here works good.
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