Author Topic: 028S - worn piston  (Read 351 times)

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Offline qigley

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Re: 028S - worn piston
« Reply #10 on: November 14, 2016, 07:38:33 pm »
This saw in pic isnt a 028 super.  Like jmester said. Looks like 029 or 029 super
Yep, you guys are right, that wasnt my saw in the pic I put up on Pg 1.  I downloaded that pic off the net some time ago, and forgot, and now wrongly assumed  that it was a pic I took of my problem.

My saw is definitely a 28S, and of course looks exactly like it does in the link I was given.I tried to take a pic of the piston, but my camera cant focus properly.  What I see thru the exhaust port is some hard scuffing just below the rings for 1/5 of an inch or so, then the remainder of the skirt is clean and shiny below that and not scuffed at all.

Anyways I was wondering more than the fault itself, whether there were other diagnostic checks I should do, such as crank seals, etc?  Since the 28 is not a clamshell motor, it is  a simple service  to just pull off the cylinder. So Im thinking of just doing that, replace the cyl + piston if needs be, and re use and go from there and see whether its useable as is.  The carb has been rebuilt, so if the cyl/piston rebuild doesnt make it run good, then all I have left to do is get in to the crank area.

False strategy or not?

 

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