Author Topic: 038 piston question  (Read 505 times)

0 Members and 38 Guests are viewing this topic.

Offline Sintersis

  • pruner
  • *
  • Posts: 3
  • Karma: 0

  • Total Badges: 9
    Badges: (View All)
    One year Anniversary Level 2 Search Combination Topic Starter First Post
038 piston question
« on: October 14, 2013, 01:59:14 pm »
Hi all, new member here
I have a second hand stihl 038 that won't start, I've been through the usual suspects with the ignition and fuel/carb side of things
I've also checked the carb to cylinder hose/sleeve and the impulse hose that's hiding back there but still nothing

As a last resort I pulled the cylinder head off to check as I noticed some scratches on the piston and found this




In the collective oppinions of the forum is this piston shot ??

Share on Facebook Share on Twitter


Offline Cut4fun

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 4664
  • Karma: 216
  • OHIO REDNECK

  • Total Badges: 44
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Eighth year Anniversary Level 7 Seventh year Anniversary Apple User
Re: 038 piston question
« Reply #1 on: October 14, 2013, 02:15:13 pm »
Welcome.

On PB pics use IMG code to embed like this.



Offline Cut4fun

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 4664
  • Karma: 216
  • OHIO REDNECK

  • Total Badges: 44
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Eighth year Anniversary Level 7 Seventh year Anniversary Apple User
Re: 038 piston question
« Reply #2 on: October 14, 2013, 02:16:10 pm »
That one looks shot.

Check to see if you can save the cylinder.

Offline Sintersis

  • pruner
  • *
  • Posts: 3
  • Karma: 0

  • Total Badges: 9
    Badges: (View All)
    One year Anniversary Level 2 Search Combination Topic Starter First Post
Re: 038 piston question
« Reply #3 on: October 14, 2013, 04:25:49 pm »
Here's a few pics of the cylinder, It has some finer scratches but i guess that the pot is chrome lined and the piston is soft aluminium or magnesium and designed to wear ??





what ever the outcome I'm preparred to buy a piston and pot if it's necessary, just to get the saw running and useable.

Offline Fish

  • Piped Saw
  • *****
  • Posts: 309
  • Karma: 39

  • Total Badges: 19
    Badges: (View All)
    Second year Anniversary One year Anniversary Search Level 4 100 Posts 50 Posts
Re: 038 piston question
« Reply #4 on: October 14, 2013, 06:17:23 pm »
looks like straight gas....

Offline Bitburger

  • 4 cube
  • **
  • Posts: 41
  • Karma: 7
  • Location: Menlo Park, CA

  • Total Badges: 22
    Badges: (View All)
    Level 5 Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: 038 piston question
« Reply #5 on: October 14, 2013, 06:32:16 pm »
you might be able to save the cylinder, but you have to remove ALL of the depositions that came from the piston!

When you re done, you can check if the chrome (or Nikasil) is still okay. It will also get worn off when removing the aluminum, this is why you can't tell before.

Some fellows at home now switched to sodium hydroxide to remove the aluminum chemically. I am not convinced but give him a try !
And always where protective glasses!!!

Offline Al Smith

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2779
  • Karma: 181

  • Total Badges: 34
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Eighth year Anniversary Level 6 Seventh year Anniversary Sixth year Anniversary
Re: 038 piston question
« Reply #6 on: October 16, 2013, 04:50:13 pm »
Probabley the safest way to get rid of the tramp aluminum is with a Scotch -Brite pad using kerosine,diesel fuel or WD-40 . Don't get in a hurry and try honing it out .Take it from one who knows a hone will go right through the plating .

That piston is shot no doubt .

 

Related Topics

  Subject / Started by Replies Last post
1 Replies
432 Views
Last post December 24, 2012, 05:30:19 am
by Al Smith
14 Replies
760 Views
Last post January 26, 2013, 01:38:18 pm
by mdavlee .
1 Replies
453 Views
Last post March 31, 2013, 09:51:03 pm
by Remington
12 Replies
1305 Views
Last post September 25, 2013, 09:27:52 pm
by Vance in AK
6 Replies
1008 Views
Last post October 15, 2013, 06:19:26 pm
by Al Smith
18 Replies
1607 Views
Last post October 27, 2013, 09:26:23 pm
by 660magnum
5 Replies
616 Views
Last post November 01, 2013, 11:30:50 pm
by 660magnum
066 on a 064 question

Started by SDB777 « 1 2 » Stihl

18 Replies
1928 Views
Last post January 29, 2014, 03:10:18 pm
by Tractorsaw1
8 Replies
612 Views
Last post January 20, 2014, 06:57:42 pm
by roostersgt
10 Replies
842 Views
Last post September 06, 2014, 07:00:15 pm
by Fish