Quick question guys. What is the bore of a super 550? I have a handful of 550's. One is a super. I am cleaning and sorting parts trying to figure which one is the super.
McCulloch Chain Saws
- Thread starter Bruce Hopf
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I am in the process of fully rebuilding my McCulloch 640 Chainsaw. I have an issue where I need to reseal the two piece gas tank.
Have any of you had success with any of the commercially available multi-step processes to strip, etch and re-seal/line the gas tank? How did you plug off the fuel outlet and/or cap (or did you)? Because it’s a two piece tank, did you work on the halves individually or together? If you worked on it together is there a way you did so without wasting a fuel tank gasket?
Your insight is much appreciated!
Thanks!
Ive used both Red kote and a thin layer of jb weld.
Ive used redkote several times with great success. Follow the directions though. Id do it on a sunday then let it set all week before use. Time is your friend.
Jason,according to Acres' site,the 550 has a bore of 2.165 in.,but gives no specs on the Super 550 which is 4cc bigger.Sometimes Mac hadf the specs listed in the IPLs.I'll also emphasize that Acres' site is not always accurate.If you have them torn down,or have another method you could go through them by a process of elimination.Good luck!
The past couple years I have been using seal all on the two peice 10-10 tanks that have a gasket. It's been holding. I have not tired it metal to metal. I did a metal to metal on an 8200 with motoseal tank sealer. It was a bust. Not sure if the 640 has a gasket or not. Seal all being clear helps ascetics also. I use Red cote on the tank insides of all rebuilds now, it's good stuff.
640 used the same gasket as the 700 and 800 model large frame top tank saws. You'll see a few different part number (e.g. 55627, 65632, etc.)...I have a good supply if you need one.
Mark Heimann
Mark Heimann
Thank you Ed.
According to the IPL the Super 550 uses piston 62883 which is the same thick ring piston as some of the 795 saws, cylinder bore is 2.219"
The regular 550 uses piston 58878 and has a cylinder bore of 2.164.
Mark
The regular 550 uses piston 58878 and has a cylinder bore of 2.164.
Mark
I got a little more done on the 850 today.I fixed the switch wire.After looking at it a bit closer,I saw that the P.O.had put some type of plastic housing over the wire to protect it from grounding out against the special stud that holds the module in place.It would've worked real nice if he had moved it up more on the wire so that it could plug onto the spade on the module I had to cut that housing off & I bent the spade a bit & now there's plenty of clearance.I also thought that the tank boss for the bolt that screws in to hold the front handle was stripped.I turned the bolt in a bit more & all is well (so far).I was going to cut a chain down today too,but when I opened the bag of presets,that's all I got was presets,no tie straps.So much for ordering on Amazon,Lol.I didn't look at the pic that closely,I just read the description which said "25 Presets/Tie straps".I thought I was getting both,apparently not.I put some oil in the 850 & firerd it up on the 2nd pull to see if the oiler worked.It pumps out oil considerably.There's only one thing that's baffling me & that's the rear handle brace & how it connects to the rear handle.I'll need some ides on how to fix it.I'll get some pics on here tomorrow.
Thanks Mark. I tore down another one today and the bore and piston looked great. After a good cleaning in the sink and flushing everything out with about a half can of WD Im confident enough that Im not going to remove the crank. I have two good ones so far one that ingested something pretty nasty and another I haven't touched yet.
Just reuse a tie strap from your chain Ed
They usually get destroyed in the process of grinding off the rivets.I don't have a chain breaker,so I use my bench grinder.
Very nice looking saw. I like the sawdust screen myself...
Mark
Mark
Yea the original was busted up , had to do some tweaking to make it fit properly but looks good, thanks Mark
Thats a pretty one! congrats!
C'mon tell us more. Good job on the bar
but pretty darn close lol . 
Thanks bud !
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