Author Topic: Dolmar 7900 piston choices  (Read 6953 times)

0 Members and 0 Guests are viewing this topic.

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 21874
  • Karma: 522
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7900 piston choices
« Reply #50 on: August 16, 2012, 10:02:21 pm »
The 52mm oem open windowed I have here I know is around 16.75mm top of pin hole to crown and 12mm pin. I will have to get the rest tomorrow if I get time.

Oh I aint looking for a piston for a dolmar either.  Pretty much staying away from them now days.
REDNECK Saw Repair Getter Done

Offline Cut4fun

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 4040
  • Karma: 159
  • OHIO REDNECK
Re: Dolmar 7900 piston choices
« Reply #51 on: August 17, 2012, 01:18:55 pm »
Man if I measured this OEM 52mm piston right (my digital calibers was giving me fits).  It is a very nice stock piston  ;D.

Correction made on ext and int today with new battery

top of pin hole to crown 16.75mm
ext int skirt 35.20mm 35.15
height 42.65mm
pin 12mm




REDNECK Saw Repair

Offline 604f_1

  • 4 cube
  • **
  • Posts: 51
  • Karma: 14
Re: Dolmar 7900 piston choices
« Reply #52 on: August 17, 2012, 07:41:31 pm »
PP475 piston ?

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 21874
  • Karma: 522
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7900 piston choices
« Reply #53 on: August 17, 2012, 10:41:51 pm »
REDNECK Saw Repair Getter Done

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 21874
  • Karma: 522
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7900 piston choices
« Reply #54 on: August 18, 2012, 07:16:46 pm »
CORRECTION:

New battery put in and checked skirts again. The first measurement is WRONG they are NOT 40mm they are only 35.20 ext and 35.15 int. Sorry, but like I said the digital calibers were acting up first time.
REDNECK Saw Repair Getter Done

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 21874
  • Karma: 522
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7900 piston choices
« Reply #55 on: August 19, 2012, 04:52:22 pm »
Anyone know the skirt width on the meteor 064 piston?  I know the meteor was wider then the oem piston. Used to have a BB372 with a meteor 064 piston in it.

    Stihl 064, MS 640 Meteor
   
    Height 43mm   
    Pin 12mm x 33mm x 8mm
    Pin hole top to top of Piston 17mm
   
BB372

Bore 52mm
Height 42.5mm
Piston Pin 12mm x 8mm x 36mm
Pin to top of Piston 16.75mm


2 different makers of 046 pistons


Stihl 046, MS 460
Replaces Part Number 1128 030 2009
Bore 51.96mm
Height 39.25mm
Head Type Flat
Piston Pin 12mm x 35mm x 7mm
Ring 52mm x 1.2mm (Caber F-Cast GH.F)
Compression/Pin Top to top of Piston 15.5mm
Compression/Pin Center to top of Piston 21.5mm

Stihl 046, MS 460
Replaces Part Number 1128 030 2009
Bore 52mm
Height 39.25mm
Head Type Flat
Piston Pin 12mm x 7mm x 35mm
Rings 52mm x 1.2mm Ductile Split Groove
Circlips 12mm
Compression/Pin to top of Piston 15.5mm
Compression/Pin Center to top of Piston 21.5mm






REDNECK Saw Repair Getter Done

Offline Playinwood

  • 6 cube
  • ****
  • Posts: 246
  • Karma: 5
Re: Dolmar 7900 piston choices
« Reply #56 on: October 20, 2013, 07:25:16 pm »
Here's a well broken in 7900, with I believe is a stock piston in dry hard sugar maple, its as tough as it gets in my area. 16 x 18 inch material


http://youtu.be/aQbfh9klJGo

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Dolmar 7900 piston choices
« Reply #57 on: October 20, 2013, 07:44:05 pm »
Your link is corrupted
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 Playinwood

  • 6 cube
  • ****
  • Posts: 246
  • Karma: 5
Re: Dolmar 7900 piston choices
« Reply #58 on: October 20, 2013, 07:57:48 pm »
how does that happen, link runs fine on Eds site

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Dolmar 7900 piston choices
« Reply #59 on: October 20, 2013, 08:04:31 pm »
It works now. I don't know what the problem was?
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 . . .

 

Related Topics

  Subject / Started by Replies Last post
201 Replies
3789 Views
Last post October 17, 2014, 11:42:53 am
by EHP
1 Replies
1170 Views
Last post March 10, 2012, 07:00:24 am
by MCW
29 Replies
3599 Views
Last post July 29, 2012, 08:03:35 pm
by Cut4fun .
0 Replies
307 Views
Last post March 10, 2013, 07:58:03 pm
by Cut4fun .
8 Replies
475 Views
Last post July 30, 2013, 09:20:17 am
by farmboy
28 Replies
2265 Views
Last post April 09, 2016, 02:02:55 pm
by computeruser
6 Replies
899 Views
Last post June 30, 2017, 05:39:15 pm
by Philbert
2 Replies
363 Views
Last post June 19, 2014, 03:32:20 pm
by farmboy
15 Replies
665 Views
Last post June 20, 2014, 07:14:42 am
by Chainsawr
6 Replies
139 Views
Last post June 14, 2014, 02:48:05 pm
by KilliansRedLeo