Chainsaw Repair

Chain - Grinders - Filing - Wood Milling - Tools - Welding - Machinist - Mowers - Tillers => Welding Shop => Topic started by: srcarr52 on May 28, 2015, 12:52:07 pm

Title: Welded and repaired Stihl 084 decomp boss
Post by: srcarr52 on May 28, 2015, 12:52:07 pm
Someone must have ham handed the decomp in and it c-racked the top of the boss off the cylinder.

(http://i1133.photobucket.com/albums/m599/srcarr52/Chainsaws2015/WeldingWork/IMG_4158_zpsfo2i6xdh.jpg)

(http://i1133.photobucket.com/albums/m599/srcarr52/Chainsaws2015/WeldingWork/IMG_4170_zps1fgn0bev.jpg)

Build up weld.

(http://i1133.photobucket.com/albums/m599/srcarr52/Chainsaws2015/WeldingWork/IMG_4174_zpszly4rpab.jpg)

Drilled and taped new hole on the mill and then finished off the rest by hand. The hole was a little off originally from the remainder of the original. I had to move it over so the decomp would seat correctly, so the threads are not full circle but it's plenty to hold it tight.

(http://i1133.photobucket.com/albums/m599/srcarr52/Chainsaws2015/WeldingWork/IMG_4177_zpsfb6mdrg6.jpg)

(http://i1133.photobucket.com/albums/m599/srcarr52/Chainsaws2015/WeldingWork/IMG_4175_zpsrfhp3h0r.jpg)

After a little blending with the bead blaster. (Sorry for the sideways picture, photobucket takes forever to update an edited picture.)

(http://i1133.photobucket.com/albums/m599/srcarr52/Chainsaws2015/WeldingWork/IMG_4178_zpsip3mcubk.jpg)
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: Cut4fun . on May 28, 2015, 12:57:09 pm
Very nice. I had a 084 cyl with bad decomp hole that could have used that treatment.

Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: srcarr52 on May 28, 2015, 01:01:13 pm
Very nice. I had a 084 cyl with bad decomp hole that could have used that treatment.


Hmm, so this is a common failure?
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: Cut4fun . on May 28, 2015, 03:01:06 pm
Very nice. I had a 084 cyl with bad decomp hole that could have used that treatment.


Hmm, so this is a common failure?


Mine was the first I had seen. But Lakeside Andy seemed to say it was pretty common when I ask him about it.  He had pretty much said to fix the same way you did.

Not sure but thinking Ron may have my old cylinder. The threads were gone on half a side if I remember right.  @man of stihl
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: man of stihl on May 28, 2015, 04:59:00 pm
Very nice. I had a 084 cyl with bad decomp hole that could have used that treatment.


Hmm, so this is a common failure?


Mine was the first I had seen. But Lakeside Andy seemed to say it was pretty common when I ask him about it.  He had pretty much said to fix the same way you did.

Not sure but thinking Ron may have my old cylinder. The threads were gone on half a side if I remember right.  @man of stihl
Yep I still have that cylinder.
Nice looking fix srcarr
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: 3000 FPS on May 28, 2015, 08:59:37 pm
Nice fix, I like the bead blast blend.   Makes it look good.    And looks do matter.
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: mdavlee . on May 29, 2015, 11:22:28 am
Good looking work. I think I know who's cylinder that is.
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: srcarr52 on May 29, 2015, 02:09:39 pm
Good looking work. I think I know who's cylinder that is.

Yes you do, thanks for the referral.
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: mdavlee . on May 29, 2015, 06:45:26 pm
No problem.
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: chy_farm on September 28, 2017, 08:30:48 pm
Good looking work. I think I know who's cylinder that is.

Yes you do, thanks for the referral.
Very good job Srcarr, what kind of filler rod do you use for this job, I mean cylinder repair?
I have A-4043 (which is so called silicon-rich), A-5356 (mag-rich) and A-5183 (also mag-rich), wonder if I can try this job with one of these rods, thanks in ahead.
Chy
Title: Re: Welded and repaired Stihl 084 decomp boss
Post by: Cut4fun . on September 28, 2017, 09:10:54 pm
Seen pics here where he welds up stripped plug holes and redoes them too.