Author Topic: 7900 Piston Recommendations?  (Read 672 times)

0 Members and 0 Guests are viewing this topic.

Offline KilliansRedLeo

  • Nitro Hotsaw
  • *******
  • Posts: 2361
  • Karma: 80
  • Location: Rochester, NY
    • RoCHusqvarna
7900 Piston Recommendations?
« on: June 11, 2014, 08:12:18 am »
Looking for a recommendation on an AM piston set for a Dolmar 7900. This is a red o older saw and uses the windowed piston but could also use the slab side piston from a later model.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Share on Facebook Share on Twitter


Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline KilliansRedLeo

  • Nitro Hotsaw
  • *******
  • Posts: 2361
  • Karma: 80
  • Location: Rochester, NY
    • RoCHusqvarna
Re: 7900 Piston Recommendations?
« Reply #2 on: June 11, 2014, 09:33:59 am »
Jim, got one of those the other day, pure junk. So poorly made it was a crime, wrong ring supplied with piston, circlips break when trying to install. Then with new correct ring and good clips, saw would only make 90psi with oil in the bore. Threw the thing in the trash metal bin, and when it hit the skirt broke off.

Now you know why I am looking.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline Nathaniel Vansickle

  • Piped Saw
  • *****
  • Posts: 468
  • Karma: 92
  • Location: Newcomerstown ,Ohio
Re: 7900 Piston Recommendations?
« Reply #3 on: June 11, 2014, 10:00:02 am »
haven't seen any quality AM ones but I will surely stock them when I find them. OEM is pricey
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: 7900 Piston Recommendations?
« Reply #4 on: June 11, 2014, 11:16:44 am »
That one that HLS sells is the only after market one I know of.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: 7900 Piston Recommendations?
« Reply #5 on: June 11, 2014, 12:03:55 pm »
That Greek dude (kafar?) on eBay sells a decent AM cylinder and piston w/Caber ring. 52mm  EPISAN brand piston

Offline KilliansRedLeo

  • Nitro Hotsaw
  • *******
  • Posts: 2361
  • Karma: 80
  • Location: Rochester, NY
    • RoCHusqvarna
Re: 7900 Piston Recommendations?
« Reply #6 on: June 12, 2014, 02:47:22 pm »
Thanks Adam, found the guy (Dandrikop) also had an AM moly-coated piston for 29$ so bought that. The original jug cleaned up real well. He has the C/P on sale for $91.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: 7900 Piston Recommendations?
« Reply #7 on: June 12, 2014, 05:13:59 pm »
Tim, he's the guy!!!  Have a 52mm p/c coming from him too.  friend ordered a kit from him a while back and the quality was nice.  Piston was nicely cast, not the portly Chinese piston I was used to seeing

Offline KilliansRedLeo

  • Nitro Hotsaw
  • *******
  • Posts: 2361
  • Karma: 80
  • Location: Rochester, NY
    • RoCHusqvarna
Re: 7900 Piston Recommendations?
« Reply #8 on: June 12, 2014, 09:07:36 pm »
Thanks Adam, was toying with putting an 038 Stihl piston in it but not into all the screwing around.

Did you get the RD-400 crank in yet? Is it in good enough shape to be useful after rebuild?
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: 7900 Piston Recommendations?
« Reply #9 on: June 12, 2014, 09:29:20 pm »
I know what you mean about messing with odd compression heights on piston swaps!!

I got the rd400 crank and it's in surprisingly good shape! Was a little nervous as the eBay pics were real dark.   I'm sourcing some oem Rods, bearings, etc then I'll send it For a rebuild and true.  There's a veteran two stroke engine builder (Scott Clough Racing) south of me and his pricing Is quite reasonable.  I'll keep everyone posted.

 

Related Topics

  Subject / Started by Replies Last post
72 Replies
6990 Views
Last post August 30, 2015, 01:21:23 pm
by Cut4fun .
8 Replies
492 Views
Last post July 30, 2013, 09:20:17 am
by farmboy
28 Replies
2290 Views
Last post April 09, 2016, 02:02:55 pm
by computeruser
10 Replies
254 Views
Last post March 12, 2014, 11:07:39 pm
by HolmenTree
25 Replies
942 Views
Last post February 18, 2015, 10:59:36 pm
by Ducksnuff870
2 Replies
369 Views
Last post June 19, 2014, 03:32:20 pm
by farmboy
6 Replies
144 Views
Last post June 14, 2014, 02:48:05 pm
by KilliansRedLeo
8 Replies
325 Views
Last post May 08, 2015, 12:21:49 am
by aclarke
3 Replies
295 Views
Last post December 08, 2017, 01:25:19 pm
by Tractorsaw1
4 Replies
122 Views
Last post February 27, 2020, 02:59:14 am
by mkjt88