MS460 Teardown-Comments Welcome

[mdavlee]

Bicycle pump would be best over a compressor. Hard to get regulated down to under 10psi for most. Blood pressure pumper will pull some vacuum on it as well.

 

[MustangMike]

I have done the spark test twice with the alligator clip wire. There is spark.

 

[Moparmyway]

I have done the spark test twice with the alligator clip wire. There is spark.

Did you do it with a plug that has the ground strap on it still, or was the strap removed.
The details Mike, the details !!

 

[MustangMike]

I take the plug out, reconnect the coil wire, take a wire w/alligator clips on both ends, attach one end to the bottom of the plug and the other end to the engine block, go to a dimly lit room, and pull.

I spoke to someone today who told me that sometimes the coils mess up on their timing, so just because it is producing a spark does not mean it is still good. This could explain a lot!

 

[leadfarmer]

Mike I never did hear for sure if your plug is wet

 

[MustangMike]

Looked wet one time, but not the next. Perhaps, if it is firing out of time, it would not look wet, and not do anything!

(Would likely only pop if it fires under compression)

 

[Deets066]

Mike I never did hear for sure if your plug is wet

He said he had fuel coming out the muffler.......

 

[MustangMike]

Yes, after I put it directly into the carb.

 

[leadfarmer]

You didn't put the diaphragm in the carburetor in the wrong position did you

 

[Deets066]

You didn't put the diaphragm in the carburetor in the wrong position did you

That definitely floods the saw! Ive done it.

 

[angelo c]

Mike have you placed the piston at TDC and turned the saw upside down yet.
If you want ship it to me and I'll fark with it fer ya.

 

[Deets066]

Mike have you placed the piston at TDC and turned the saw upside down yet.
If you want ship it to me and I'll fark with it fer ya.

This still doesn't get all the fuel out, it has nowhere to really go unless you lift the jug a little

 

[angelo c]

This still doesn't get all the fuel out, it has nowhere to really go unless you lift the jug a little

You will get a good indication if there is a chit load of mix in the case. a couple of pulls on the starter cord will let enough case mix pass by the rings to confirm IMO.
I've done it with a 440 that I thought was locked up. So much fuel in case that the piston could not get in.

 

[MustangMike]

I've tried 2 different carbs, I did not rip either of them apart (at least not recently). I'll try turning it up side down and see what happens.

If it does not run after I get the new coil & carb, I'll consider alternatives.

Right now it is frustrating, but I have 5 running saws, so it is not exactly like I really need it now. Just never had this much trouble with one.

 

[5000+]

I would empty your fuel tank. Pull the spark plug. Turn the saw upside-down and pull the rope several times. Pull the air filter and pull the rope again withe saw upright. When you are sure the cylinder and crankcase is dry, reinstall a known good plug and put about 5 or so drops of fuel down the carb throat and set fast idle no choke. The saw should fire and run a short time if everything else is ok.

 

[Cutforfun]

Did you pull the flywheel to verify that you did not sheer the keyway.

 

[angelo c]

but I have 5 running saws, so it is not exactly like I really need it now. Just never had this much trouble with one.

5 running saws...????

did you mean to say you only have 5 running 1128(046/460) saws or ONLY 5 saws....only 5 saws is a problem young man....

 

[Keith Gandy]

I'm putting the saw back together. Even though the outside looks battered, it now has new bearing & seals and all new rubber, and will get that nice ported 046-D jug that Al did, so I'm really looking forward to it.

Two things that really frustrate me:

1) Anyone know any trick for installing those new green Stihl gas lines in a reasonable amount of time? I lubricated it and tied a piece of wire to it to help pull it through, and it still took me about an hour to get it in right. THERE MUST BE A BETTER WAY!!!

2) Any advice on installing those piston clips??? I know Stihl makes a special tool for it, but you would need to get one for each piston pin size. Luckily, the local dealer did it for me no charge, before I launched the darn thing into outer space.

Back to work on the saw!

Mike Snap On makes a pair of larger needle nose that has grooves cut in each arm parallel with the arms that will squeeze the clip on the end nicely

 

[MasterMech]

Mike,

Do you ever get up this way? I'm working insane hours still but I'd take a peek at it if you wanted.

 

[junkman]

Have you tried an hd2 air filter and a dual port muffler cover yet ?