Piston/Base Gasket/Cylinder Measurements

[Billy Currie]

I would like to start a thread for providing measurements of cylinders, pistons, and gaskets. This is with the intent of seeing what's close of other models and what isn't without spending a lot of money on something that doesn't work. How close to the original measurements should be at the discretion of the assembler. If clarification is needed of a part, ask in the thread or message. I will add more as time permits. If all you have is one part, add it. You don't need everything to add a model.

I'll start with something odd, a Partner 7000, OEM parts. Here is a picture of what I have.. the wrist pin is 12mm, piston height from bottom of skirt to the top of the piston is 40mm + 2.2mm for the dome with a total height of 42.2mm. Sorry I missed that.

 

[Nutball]

Excellent idea. I'll get measuring. I'd be interested in the dimensions of a 3120xp.

Is AM good enough reference? I expect it to be at least mentioned as an AM reference.

 

[Billy Currie]

Excellent idea. I'll get measuring. I'd be interested in the dimensions of a 3120xp.

Is AM good enough reference? I expect it to be at least mentioned as an AM reference.

True, after market and manufacturer would be a good idea. I added that to my post.

 

[kneedeepinsaws]

Good idea, ill bookmark this. Someone with excell tallents should start up a sheet

next one i rip apart ill take measurements/pics as well

 

[Wilhelm]

A list of desired measurements would be of help so that everyone measures the same dimensions.
Something like the OP's drawing devoid of measures so it can be printed?!

I do not build saws, as such I do not know which measurements are desired.

 

[Billy Currie]

A list of desired measurements would be of help so that everyone measures the same dimensions.
Something like the OP's drawing devoid of measures so it can be printed?!

I do not build saws, as such I do not know which measurements are desired.

Like a drawing of a piston with all dimensions labeled: dimension A, B, C, etc. I see where you are going with that. I think @kneedeepinsaws was suggesting a similar idea as well.

 

[Billy Currie]

Stihl 038 M cylinder and piston, OEM, 1119 020 1202.

 

[Nutball]

It would be nice to have a standard dimension sheet, a drawing of piston and cylinder with blank spaces marked for each place to measure would be nice, so people can just copy the sheet/image, write in their measurements without forgetting any, and post it.

 

[Billy Currie]

It would be nice to have a standard dimension sheet, a drawing of piston and cylinder with blank spaces marked for each place to measure would be nice, so people can just copy the sheet/image, write in their measurements without forgetting any, and post it.

Ok, did I leave anything out that needs to be added? Or, is there measurements here that don't need to be there?

 

[Nutball]

Unless I'm missing something, maybe distance from pin to crown.

 

[Billy Currie]

Gotcha covered. I didn't make that measurement from the center of the wrist pin, I went from the top.

 

[Nutball]

Left to right like a book:

660 FT
A 54mm (53.74-53.93mm)
B 12mm
C 42.93mm
D 35mm straight across
E 14.5mm
H 3.50mm
I 2.75mm
J 1.2mm
K 17.06mm
L 13.9mm

660BB white box
A 56mm (55.72-55.94mm)
B 12mm
C 41mm
D 35.6mm straight across
E 14.8mm
H 3.2mm
I 2.54mm
J 1.2mm
K 17mm
L 12mm

395 Hwy
A 56mm (55.76-55.92mm)
B 13mm
C 48mm
D 39.1mm
E 18.75mm
H 3.40mm
I 3.55mm
J 1.16mm
K 20.5mm
L 14.5mm

395 popup Hwy
A 56mm (55.75-55.93mm) Observed the thickest dimension is front to back, .1mm narrower on the sides, didn't check above pistons for this.
B 13mm
C 48mm
D 39.1mm
E 18.75mm
F 38.4mm
G 0.5mm
H 3.40mm
I 3.55mm
J 1.16mm
K 20.5mm
L 14.5mm

395 BB popup Hwy
A 58mm (55.74-55.92mm) Also thinner on the sides by .05-.1mm
B 13mm
C 48mm
D 40.4mm straight across as with all the other pistons
E 18.8mm
F 39.5mm
G 0.5mm
H 3.32mm
I 3.65mm
J 1.16mm
K 20.5mm
L 14.5mm

026 Warhawk
A 44.7mm (44.56-44.68mm)
B 10mm
C 32.35mm
D 27.95mm
E 13.7mm
G 1.35mm?
H 2.65mm
I 2.77mm
J 1.2mm
K 14.7mm
L 7.65mm

029 white box
A 46mm (45.84-45.92mm)
B 10mm
C 36.8mm
D 36.6mm
E 14.5mm
H 2.7mm
I 2.5mm
J 1.5mm
K 15.36mm
L 11.4mm

028 Hwy
A 46mm (45.80-45.95mm)
B 10mm
C 35.7mm
D 30.6mm
E 13.6mm
F 22.7mm
G 2.55mm
H 3.5mm
I 2.7mm
J 1.5mm
K 15mm
L 10.7mm

028 FT
A 46mm (45.80-45.95mm)
B 10mm
C 35.45mm
D 30.6mm
E 14mm
F 22.5mm
G 3.65mm
H 3.5mm
I 2.7mm
J 1.5mm
K 15mm
L 10.7mm

365 Warhawk
A 48mm (47.73-47.88mm)
B 12mm
C 42.52mm
D 21-38.75mm
E 16mm
H 3.35mm
J 1.5mm
K 16.65mm
L 13.85mm

039 popup Cross
A 49mm (48.67-47.95mm)
B 10mm
C 37mm
D 37mm
E 13.9mm
F 27mm
G 0.9mm
H 3mm
I 2.5mm
J 1.5mm
K 15.5mm
L 11.5mm

200t white box
A 40mm (39.86-39.94mm)
B 9mm
C 30mm
D IN23.5mm, EX25.4mm
E 10.5mm
H 3.35mm
I 2.5mm
J 1.5mm
K 11.9mm
L 9.1mm

390xp OEM
A 55mm
B 13mm
C 46.65mm
E 17.6mm
H 3.35mm
I 3.4mm
J 1.2mm
K 20.15mm
L 13.5mm

590 OEM
A 45mm (44.9)
B 11mm
C 40.70mm
E 17.3mm
G 2.2mm
H 3.0mm
J 1.5mm
K 13.5mm
L 16.2mm

 

[Nutball]

I found this pic of a 070 piston from aliexpress & ebay

Sumbuddy told me they had a 13mm pin, but if the piston really is 53.3mm tall, that's too tall for my project anyway. I'm glad I didn't buy one. Looks like pin center to skirt is about the same as a 395, but way taller above.

 

[Nutball]

Echo 590
A 45mm (44.96)
B 50mm
C 50mm
D 71mm
E 64.9mm
F Bottom fed
G Non strato

 

[Nutball]

Does anyone have one of these to measure? https://www.hlsproparts.com/product-p/h31354.htm (45mm 353 popup piston) It might make a good mod for an Echo 590.

 

[Billy Currie]

I have a box of pistons to add, I haven't had time, that one is not one of them. Sorry.

 

[Nutball]

How about measuring a 281 & 288 piston.