• Please be aware that we have recently gotten a wave of users that, when researched, are found to be from Nigeria. They are trying to sell products and asking to be paid through Zelle or Venmo leaving users with no recourse if they don't ship the product. If you suspect this activity please contact admin and we will research their information to verify their location.

ArboristSite.com Sponsors
www.harvesterbars.com


Stihl 038 Magnum 2 chain spins at idle. Ordered new tension springs but ...

Tomas Caballero

Tomas Caballero

ArboristSite Member
Joined
Jun 24, 2017
Messages
70
Age
59
Location
Wenatchee
First time post for long time lurker. I've learned a lot from the site. I have a craigslist find Stihl 038 AV Magnum 2 that chain spins at idle. Although the clutch springs look fine, I'm going to replace them as based on other threads I'm convinced that's the problem. Clutch shoes are in good condition. But, I discovered that instead of having the correct rim sprocket cover washer it has a plain old flat washer. 0000 958 1231 is the part number on the IPL. C
Could this be what causes the chain to spin at idle?

I've ruled out most causes of a lean condition that i could think of and i can get it to idle fine at 2600-2800 rpm but chain still spins. so far I have:
  • Rebuilt Bing carburetor and pressure tested it. no bubbles when dunked in water and held 5 psi and 7 psi.
  • Crankcase pressure and vacuum tested it. held 7 psi pressure and 10 psi vacuum.
  • Tested impulse line, crankcase breather, and tank vent with no leaks.
Thanks for any help or ideas. Tom
 
Tomas Caballero

Tomas Caballero

ArboristSite Member
Joined
Jun 24, 2017
Messages
70
Age
59
Location
Wenatchee
Rocketnorton, the double row bearing is new and lubed with lithium based grease. The chain is difficult to manually roll around the bar even when slightly loose. Is it the washer then? What's the function of the rim sprocket cover washer other than to hold the rim sprocket in place? Thanks for the response. Tom
 
HarleyT

HarleyT

Tree Freak
Joined
Dec 6, 2014
Messages
17,434
Age
43
I think that you have narrowed down your problem. Take off your clip and explore the problem. If it is tight, then the sprocket wants to turn with the crankshaft, using aftermarket stuff may be the problem.
 
a. palmer jr.

a. palmer jr.

Tree Freak
Joined
Apr 8, 2007
Messages
13,645
Location
Southern Indiana
I went through that with my 038. The chain can't be too loose on the bar or it might spin at idle, but I'm betting that your main problem is with the springs which I had to replace. Actually, I had to replace most parts on mine since I bought it as a parts saw..
 
Tomas Caballero

Tomas Caballero

ArboristSite Member
Joined
Jun 24, 2017
Messages
70
Age
59
Location
Wenatchee
Thank you kindly for the responses. I replaced the washer with OEM. chain spin at idle decreased considerably. I then replaced the clutch springs and the 038 Mag 2 is working beautifully. Purrs like a kitten (angry kitten) at idle of 2600. Adjusted the high so i get a slight 4 stroke at wot. Now I need to fix my sprained knee so I can take it into the woods for some fun. :) Regards, Tom
 
Jkstihl

Jkstihl

Chainsaws make me fap.
Joined
Jun 15, 2017
Messages
1,216
Age
33
Location
Alabama
Just tore my 038super down, chain was spinning at idle.... Broke spring, I had 3 extras just replaced the broken one, chain don't spin at idle anymore.. I also need the little metal piece on the brake handle that engages the brake if anyone has one. IMG_20170705_193450.jpg
 
Jkstihl

Jkstihl

Chainsaws make me fap.
Joined
Jun 15, 2017
Messages
1,216
Age
33
Location
Alabama
I'll see if I can find a pic online I done got her back together and working with it today. It's the little metal piece on the brake handle that actually pushes the spring mechanism down.
 
Jkstihl

Jkstihl

Chainsaws make me fap.
Joined
Jun 15, 2017
Messages
1,216
Age
33
Location
Alabama
It's what pushes the black lever in half to fold it and spring the break on....I think it may be the silver piece
 
Top