Author Topic: Dolmar 7900 piston choices  (Read 9989 times)

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Offline Cut4fun .

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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.

Offline Cut4fun

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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




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Offline 604f_1

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Re: Dolmar 7900 piston choices
« Reply #52 on: August 17, 2012, 07:41:31 pm »
PP475 piston ?

Offline Cut4fun .

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Re: Dolmar 7900 piston choices
« Reply #53 on: August 17, 2012, 10:41:51 pm »

Offline Cut4fun .

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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.

Offline Cut4fun .

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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







Offline Playinwood

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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



Offline 660magnum

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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

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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

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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...
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