Stihl 028 - Impulse and Intake Boot Tricks?

[Clarkbug]

Hey All.

This past weekend I managed to replace the fuel line and filter on the 028 Super I picked up a few weeks ago. The old one was pretty badly cracked and broke off when I tried to remove it. But I had a heckuva time trying to get the line to seat, but it finally did, and I somehow managed to get the filter on the end of it (I was worried I would stretch it too much in the tank, but I guess thats the only way to do it)

The shape of that fuel line makes me think that I should do the impulse line too, and maybe the intake boot. Given the amount of trouble I had with the fuel line, are there any tips/tricks for getting these on? I have to replace two of the AV mounts, so does it make sense to just separate the tank from the main body of the saw? (Im guessing its the 4 AV mounts, the intake boot, and the impulse that connect the two, so nothing else to remove)

I also noticed in pulling the carb off to do the fuel line that the grounding wire had been smashed up against where the carb is supposed to seat on the intake, so I wonder what issues that would have caused.

Any tips/advice are much appreciated!

 

[Clarkbug]

Really? No replies? You guys are gonna start giving me a complex....

 

[WoodBoss83]

stihl 028 intake boot and impulse

I would go ahead and pull the handle from the crankcase. Since you are already taking out 2 of the av mounts, just go ahead and take out the other two and slide the handle out. It will make it much easier.

 

[Clarkbug]

Any tips for getting the intake boot off the jug? OR should I pull it from the handle side instead?

 

[GM_DaddyMac]

If you are going to dissemble as WoodBoss suggests to take care of the AV mounts, the tank / handle will be free from the crankcase which will make the intake and impulse accessible.

For the impulse feed it in from the carburetor side of the tank -- pushing firmly and pulling from the jug side of the tank / handle to get it to seat. You can use a little water as lubrication, but be careful with pliers or other tools as you could stress the rubber.

For the intake re-clamp on the jug -- lining up the seams on the intake with seams on the jug. As for getting back into the tank handle -- wrap a length of string 2 to 3 times around the carb side boot leaving two ends 6 - 8" long, run the strings through the carb hole and pull the strings. Intake should seat -- remove string.

Re-assemble as follows:

1. Replace AV mounts
2. Connect intake boot to jug as described above
3. Feed impulse through tank as described above
4. Loosely connect the front two tank to crank screws -- to allow some play
5. Connect impulse line to base of jug -- this is where the play helps. You can use long needle nose but should be able to do by hand
6. Pull intake through with string
7. Double check all lines and connections are set and attached
8. Complete remainder of tank to crank assembly -- tighten all

Good luck -- let us know how it turns out.

 

[Clarkbug]

Thanks! Thats exactly the sort of info I was looking for!

Ill post back what luck I have. Hopefully the rest of the parts that I need arrive this weekend.

And is there a secret to how you are supposed to put the fuel filter on the end of the fuel line? Or just stretch it over to the opening into the tank and pop it on?

 

[Mad Professor]

Thanks! Thats exactly the sort of info I was looking for!

Ill post back what luck I have. Hopefully the rest of the parts that I need arrive this weekend.

And is there a secret to how you are supposed to put the fuel filter on the end of the fuel line? Or just stretch it over to the opening into the tank and pop it on?

I put on the filter first then thread the fuel line from the inside of the tank using a big pair of hemostats.

The string trick works great for getting the intake boot through the handle housing.

 

[Clarkbug]

Thanks Professor.

The pics really help me see what you mean. I guess I need to get me a set of the hemostats, since that would have made the fuel line install SO much easier. I hope I didnt do any damage to it putting it in, it was my first try at this sorta thing. I would imagine pulling it up through the housing is easier that pushing it through.

 

[GM_DaddyMac]

For the fuel line replacement I use a section of string trimmer line - the plastic stuff that goes on the end of your weed whacker. Put the carb end of the fuel line on the trimmer line, feed the other end through the tank and into the hole, pull the trimmer line until the fuel line appears and gently pull into place until it seats. A piece of stiff wire would do the same thing.

Replacing the fuel filter -- yes it is meant to be pliable to get out of the tank to replace without removing the fuel line. I use a section of wire hanger with a little shepherd's hook on the end to retrieve from the fuel tank.

 

[Clarkbug]

Thanks Greg! All good tips. I should have asked about the fuel line before I went for it.

Hopefully this weekend I can pick up a new impulse line for it, and figure out if the saw needs anything else. It started right up when I bought it, but I have a feeling that Ill need to make some more tweaks to it. Hopefully not a new piston, but Im thinking maybe a carb rebuild.... Then again, Im just crossing my fingers that it fires right up...

 

[Clarkbug]

Back again for some input.

I separated the tank from the main saw body, and pulled the old intake hose and the intake boot. The boot looks good to me, no tears or holes, it was just really dirty. The impulse hose also doesnt look too bad, but Im going to swap that out regardless.

Any tips on seating the new impulse line? I cant seem to get it to pop into place, and I dont want to just leave it floating out there.

 

[Clarkbug]

Sorry to reply again to my own post, but there are updates.

So I got the impulse line seated..... In the wrong hole of the tank! :doh: Of course I didnt find that out until after I finally got the hose seated, the intake pulled through, the AV mounts in, and the plastics back on...

Took it all back apart, put the hose in the right spot, and put it all back together.

Now it wont start... Ill have to start a new thread, but I wanted to say thanks to everyone for the help on this one!