Tips/tricks to remove stubborn casing screws

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jensen 32000

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Hi guys, I just picked up a Stihl 056 Magnum II, and I'm trying to clean it up, and go over it. (Seems like the compression is good but no spark). Anyways it has the old flat head screws everywhere and on the starter cover so far, I could only get 1 screw loose. Really don't want to break any. Is an impact driver too much? Any tips or tricks appreciated! Thanks Mike!
 
Hi Mike, here's what I do. Get the best slotted screwdriver with the best fit you can find, the kind that will accept a 3/8" closed end wrench just below the handle.
With the screwdriver held squarely and firmly in the screw, use the wrench as additional leverage, while pushing down on the screwdriver at the same time. This should smarten it up.
John
 
Good point gypo. Snap-on screwdrivers have a hex nut on them to help turn if you need. Some craftsman have a square shank to use a wrench also. Like gypo said the blade needs to fit ther slot well to avoid ruining the screw head. The impact drivers work well but again you may have to look for new screws. Try soaking around the screws with wd 40 , kroil, pb blaster or something like that. Good luck. Lucky
 
Put some valve grinding compound in the slot
to help get more grip.

Heat, (from running the saw a few minutes or
from a heat gun ) will also help.
 
I run into this alot while working on customers saws.....mostly because 056's and the like are notorious for vibrating out their screws and the saws fall apart. So we solve that by loading the thing with red locktite.....and that is what you have probably found.

Anyway to get to the point......snap on makes an impact screwdriver......you put the correct size flat head into thse slot with this tool attached to it....hit the tool with the hammer and it gives it a good shocking quick turn. Works like magic.

Now as with any other snap on tool it is expensive as hell Im sure. so you have to decide if you want to psend the money.
 
Stubborn Screws:

I agree with the above tips. But sometines you can try this. Turn the saw so that the screws face up. Cradle or support the saw from rocking all over the work bench, then take a screwdriver that juct fits the slot. Make sure the screwdriver is sitting square in the slot and give it a sharp wrap with a medium sized hammer. Some times this will shock the screws emough to remove them. Try it a couple times on each screw. If you are still having problems then you'll have to get the impact driver out and use it, in the manner described above. Get a bit that just fits the screw, stablize the saw, square up the bit in the slot. twist or turn the driver, in the direction you want the screw to turn and strike with a sharp blow from a hammer. This usually works for me. If the screws have not seen lock tight, then use the green lock tight to assemble. or use some antiseize compound on them and tighten accordingly. JMO. Take care. Lewis.
 
Re Stubborn Screws

Guys Thanks for all your great ideas, especially the heat gun and valve grinding compound! I do own an impact driver but I was just a bit worried that it may "snap the screw". I wouldn't doubt that Locktite may have been used but the one screw looks plain. I doing this saw as a winter semi- resto project, but can't wait to hear it run. Thanks again and I'll keep you posted. I'll probably be on the look out for the ignition parts next. Mike! Hey Gypo got more people waiting for Wood!
 
I've used Lewis' method before but it won't work on one of the starter cover screws. Just do as Gypo says and lean on it hard as you can. Usually the toughest ones are the 6 or 7 crankcase screws.

The ignition is composed of only a few parts: plug, high tension lead, stop switch and wire, flywheel, and ignition module. Probably it's the last that's gone bad, though you can still replace it--if it is SEM module. It'll be written on there somewhere. About $130--ouch!

Chris B.
 
Oh, considering that your saw is worth way more than any screwdriver you'll ever see, I wouldn't hold out for Snap-on with a hex nut. Just put a pair of vice grips on the handle and go to town.

Chris B.
 
Update

Well I managed to find just the right screwdriver and used the hot gun and got everything off that I needed, to inspect the piston on the muffler side, and it looks great! so I'll look for a while for used ignition, and if I have to I'll buy it new. I'm just real glad the piston is good. (I actually think it has never been taken apart yet) just run till it stopped I guess. Thanks again for all the help and encouragement! Mike
 
The only problem I have when someone borrows one of my
screwdrivers, and uses a hammer or vice grip on it, is where to
dispose of the body.
I do own a lot of Snap on tools, but the use of Snap On
screwdrivers is a must. They are worth the extra money.
Use the correct tool for the job.
 
The varying top plate angle on that chain looks like a freehand
filer from Ky. The third world looking wrench is interesting though.
I know that Snap-On has to use a different name and logo in
Canada due to some silly copyright issue. I believe in Canada
the trucks have "Strap-On" on their side. They also play music
like an ice cream truck, and the men come running like small
children. They also shun trading with Canadian currency.
 
flywheel

Yes, but a couple things on the outside will help. Are there screws holding the fanwheel to the flywheel? Is the flywheel threaded in the center for a puller? Is the nut about 13mm across?
Yes to 1 and 3 = Bosch
Yes to 2=SEM
 
Re Ignition

It is threaded in the middle, so I guess SEM. I thought I lucked out when I got a puller from Princess Auto, for $18.99 that is 27mm on one end and 24mm on the other but the thread must be just under 27mm. Stihl quoted me about $23.50 for one puller and $9.50 Cnd for the smaller one. I think I might get both because the price does seem right. Which ignition is more readily available? One of the is the same as a TF 350 Cutter I heard. Also the more I check it out the more original the saw looks. The starter rope is black with Stihl orange stripes in good shape. thats got to be original, eh?
 
I buy my rope from stihl, it is the same sstuff thats in the saws new..
 
ignition

Yep, I think it is the same stator. You lucked out, the old one is a bear to get one that still works. If you know a rental place you may be able to pick a good used one up reasonable,
 
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