028 AV Super Wood Boss

[K5krawler]

Hey guys I just got a new saw and wanted to share it with you guys. It's a decent 028 AV Super with some signs of wear. I picked it up and this one actually runs unlike some of the other ones I have posted up here.
However, there is one problem that I am having with it. High Idle. Now I've got it apart and down to the impluse and intake lines and don't see any obvious cracks or issues, do you think this could be a case of the carb being out of adjustment?
Should I set everything to factory 1 1/4 turns out and then try it?

-K5

And it has 135 PSI compression.

 

[jus2fat]

Well...of course...first off adjust the idle down!!...set too high??
May be nothing else wrong???

Then set the low adjustment so it's right....adjust idle again...

Read this...
Saw Carb Tuning

After adjusting as described in article...you still have problems...
time to start going through the many things that could cause it
to idle high.

Oh...and that is REALLY a nice looking saw...congrats!!!

J2F

 

[K5krawler]

J2F,

I think it might of been the spark plug. For some odd reason it was not tight at all to the cylinder. This is making me think that it was sucking air in through the spark plug hole. It didn't look like there was a nice solid sealing ring where the plug would sit.

 

[jus2fat]

That would really be cool...if it turns out that was the problem!!
But I doubt it...if it was just a little loose...but I hope the best!!
Just put a NEW plug in and let us know how it works out...

J2F

 

[DSS]

Vac test it. An air leak will give you high idle. Crank seals maybe?

 

[K5krawler]

Vac test it. An air leak will give you high idle. Crank seals maybe?

What are the condemning limits for the Vac Test?

 

[TK]

Just had an 028 in the shop with a bad set of points. Popped an electronic conversion on it and she's better than ever.

Anyway to get to the point - she blew a 170psi compression test. Don't know if the saw is stock or not, I would assume it is, so you may be a little low on compression numbers. Not that that would affect your high idle but just something to look at. I have another 028 in the shop that I'll be getting compression numbers on in the next couple of days for a comparison - if I remember to I'll share them.

 

[MnSam]

Every "new" saw I get gets the same treatment. You've got to look it over well before you use it, you never know what some yahoo before you has done to your baby. Look at the air cleaner, check the spark plug, grease the clutch bearing, make sure it is oiling, and check the carb settings. Fairly simple things, and you usually catch the majority of any potential problems. And by all means clean it/wipe it down, oily dirty saw dust can hide a lot of obvious problems.

 

[K5krawler]

Anyway to get to the point - she blew a 170psi compression test. that would affect your high idle but just something to look at.

My 031 av, 025 just blew 120 and 135 respectively and they are just fine. I think it's either a bad crank seal or the loose spark plug...I HOPE!

 

[TK]

My 031 av, 025 just blew 120 and 135 respectively and they are just fine. I think it's either a bad crank seal or the loose spark plug...I HOPE!

Oh for sure, there are plenty of saws out there that run great with those numbers. I was just thinking a 25% loss in compression (if it's really supposed to be that high) would show a possible leak via spark plug hole or something else. A little bit goes a long way.

Have you tried it again with a tight plug?

 

[7oaks]

Congratulations on a great saw. Get it squared away and you'll love it. Mine is my go to saw for every day use. Paid $100 for it about 10 years ago and it still runs amazingly strong (with a sharp chain LOL).

 

[K5krawler]

Oil Pump Gear

How does the oil pump gear come off? With the oil pump or does it pull off?

 

[Mad Professor]

Turn counterclockwise and pull

 

[K5krawler]

Did some leak testing

I happen to need a new fuel line so I used that to my advantage and hooked it up to the impulse nipple. Shot about 10 psi of air through the impulse to pressurize the case. Seems that the seals are holding and I didn't get any bubbles. Base gasket looks okay too.View attachment 187618

 

[K5krawler]

Turn counterclockwise and pull

Got it off...Just had to pry up a little more than expected.

Every "new" saw I get gets the same treatment. You've got to look it over well before you use it, you never know what some yahoo before you has done to your baby. Look at the air cleaner, check the spark plug, grease the clutch bearing, make sure it is oiling, and check the carb settings. Fairly simple things, and you usually catch the majority of any potential problems. And by all means clean it/wipe it down, oily dirty saw dust can hide a lot of obvious problems.

LOL you'll love this! The saw was "leaking oil" I figured i'd buy the saw anyways. Wiped it down like you said...waited a little bit...sure enough I found the leak. Cracked oil fill plug. All fixed now!

 

[MnSam]

That is awesome. Also, once a saw gets so incredibly dirty, people think it is ugly and wore out. Often times there is a beautiful machine hiding under all the grime. Show us a pic of it all spiffed up.

 

[K5krawler]

Flywheel Key

I need one....Sources like around town type places?
Autozone
Advanced
Napa

Any ideas?

 

[Mad Professor]

I happen to need a new fuel line so I used that to my advantage and hooked it up to the impulse nipple. Shot about 10 psi of air through the impulse to pressurize the case. Seems that the seals are holding and I didn't get any bubbles. Base gasket looks okay too.View attachment 187618

Did you test that it holds vacuum too?

 

[K5krawler]

Did you test that it holds vacuum too?

I don't have a vacuum tester :msp_unsure:

 

[TN-ELK]

Congrats on a great saw. My experience with 028's is that they'll average 160lbs comp. even with a lotta miles on'em. As said above, that is gettin close to a re-ring. I just re-built one for a guy that blew 142lbs after 27yrs of hard cuttin. Cost for the rings was less than 12 bucks (+ cylinder gasket) and it'll take around 30-40 minutes to pull the cylinder, clean it all up and put it back together. I will also take a saw that I've brought in apart ( pull the tank/handle ) and inspect the lines, int. boot, rebuild the carb., flush out the tank, and put it all back together with a fresh fuel filter. If I get less than 150lbs compression, I'll go head and re-ring it for good measure. The clutch and oiler get a good goin' over too. They're great saws....built to last.