Is this a closed port 55.......Now repaired Piston cut and photos added

[cheeves]

Did you find the cause of why it "went lean"? New piston/rings or cylinder won't last if that problem persists.

I'd start by adding Startron to your gas!

 

[stihlbro]

I'm really impressed although I've only run 2-3 tanks of fuel since putting it back together. I never checked compression before the rebuild it was $100 eBay saw that had a missing clutch cover. I just bought the cover put it together and ran it. It made it about 6 months of use before the meltdown. And it was pretty hard use I'd run gallons and gallons of fuel through it in those 6 months.

I need to get the compression tester back on it and see what it reads now that it's been run. My completely stock (except fuel screw limiters removed) 455 rancher used to out run it no problem. Now it's the other way around granted the 455 is running a 20 and the 55 is an 18 I think this thing would be faster even if they had equal bar lengths. It has tons of torque for a small saw and jumps the bar tip and saw frame pretty good when you stab the throttle. It never felt that way before the rebuild. It's sure cutting a lot faster than it ever did so I'm happy with that.

Thank you for the reply. If you would, periodically check the piston, keep us posted on how long you run it. I'm curious how long you get to run it.

 

[MRCo.]

Did you check the intake? Those rubber intake pipes leak like hell when they get some age on them. Every 51 / 55 rebuild I do gets new ones.

 

[Uzi]

Thank you for the reply. If you would, periodically check the piston, keep us posted on how long you run it. I'm curious how long you get to run it.

Wanted to bump this since its been almost 2 years. This saw is still going strong and its ran hundreds of tanks of fuel. I recently tore it down everything looked pretty good a fair amount of carbon on the piston top and in the muffler even more. Not sure if that is from my port work or running slightly too rich or both. I noticed a fair amount of fuel spitting back on the air filter so I added bridge and finger ports. Also a new caber ring. After a tank or 2 it really came to life runs harder than ever .

Guess I'll give that chopped/carved up piston another 2 years beating and look again. For being a 100 dollar eBay special it more than paid me back. It's slightly uglier but even faster than 2 years ago when I bought it.


Rough in of the ports did a little more sand/smoothing and threw it back together