Help with Old Stihl 028

[UOFan]

I'm often blamed for scope creep, the "might as well, while I'm in here," problem. But the reality is that an ounce of prevention is always worth a pound of cure, and if he already has it torn down this far...

There are few things I hate more than finally getting something back together, and then finding a new problem I could've prevented, if I'd gone just one step further before backing out.

I screw crap up all the time by over repairing, it causes headaches but I like learning. I’m in the middle of un-f***ing an ATV and pull behind spreader…both things I decided to rip apart because “they probably needed some grease or something”.

None of the stuff I work on is related to my income so no worries if equipment is down for a couple weeks while I figure it out, and I’ve got enough backups of key items (transportation, really) that it’s fine.

The saw for me is just another fun project, trying to get experience on all things mechanical so I can better teach my kids how to fix things when they get older. So I enjoy all the wisdom on this forum.

 

[dodge man]

On the screws there is probably a starting point for them. I don’t know how many turns to get them close but hopefully someone will chime in. They could be closed all the way. I don’t know how a carb is delivered.

 

[WinterDeere]

I don’t know how a carb is delivered.

Most seem to be delivered at or near the nominal starting point... unless someone prior has opened the box and turned them.

If you can't find specifics for your saw, try around 1 turn out on Hi and 1 to 1.5 turns out on Lo. Most are close enough to this setting to get it running, and then start tuning from there.

 

[RandyT]

Most carbs as previously said come close enough for initial start. And look at the saw next to the carb screw adjustment holes in the side of the saw. Most stihl will have a counterclockwise circle with a number printed next to it. Made be 3/4 or 1 or 1-1/4

 

[stevem5215]

About the carb quality, I've had more than one Chinese made carb that didn't function at all. And wouldn't start the equipment it was installed on. I usually had to do as already recommended to you which is to get a carb kit from someone else and rebuild and reclean the original carb. The only exception has been when the original carb is so far beyond repair and in that case the equipment I'm fixing is usually the same and is junked. Scored cylinders is a problem. They do sell Starting fluid with oil in the can to assist in starting 2 strokes. Look for it when buying that stuff. It'll say it on the can. It's the only starting fluid I buy.

 

[xyz123]

From my old racing days. I just use oil squirt cans with mix. I used to have one with alky and one gas mix.
But now both just gas mix for shooting a bit in carb with throttle pulled. Sometimes through a plug hole.

 

[D'oh]

That Green Coloured fuel line is suspect, check in the Tank, see if the line is Squishy/Gummy, while in there, replace the Foam Fuel Filter.

 

[denchen]

I would check, then double check the fuel pick up pipe. The slightest of crack or pin prick hole, and you would draw in air instead of fuel. Make sure the pipe is compatible with your fuel. Many new fuels have stuff that makes lots of pipe go brittle. I had a chainsaw a couple of months ago, that everyone and their dog have had a go at, turned out it was a pin hole where the pipe passed through into the fuel tank entrance rubber olive. Even after I had found it, it was a job to see.

 

[ScipioUSA]

How does the piston look if you pull the muffler off? I would pressure/vac test the saw before you go crazy. That way you can figure out if you have a massive air leak that you are trying to work around.

Also, do you know if it still has points? A common upgrade was to clip the points wire and use the "Universal" coil instead. One less thing to fiddle with.

 

[Pinecrest]

I have a Guy at ACE Hardware, all he does is maintain Stilh engines
for all the Lawn Service Companies ....he can look at one and tell you what is wrong and what it will co$t to Fix/ and when you get it back it Runs better than it ever did !