Dolmar 64xx/73xx/79xx series, smurfs and solo 665/675/681 thread

[cus_deluxe]

Mine is 1mm solder. Actually measures .037”. But it’s rosin core so it smashes easily

I had to go out and measure the stuff i use after i posted that lol. .033, but as you said this stuff is very soft so it works great.

 

[Johnmn]

I know I have said this before but use plastigauge when checking squish that's what it's made for!

 

[mettee]

I think plastigauge is less accurate than measuring with solder.

Engine builders use mic's and dial bore gauges to measure clearances, the plastic gauges can have inconsistencies they introduce, and that is why good builders check with actual known metrology tools.

If we cut the head off we can do this, the only other dependable way to do this is with solder using a proper method accounting for piston rock.

 

[Wilhelm]

Tripple dream team, Dolmar PS-7310 (24"), Dolmar PS-7900 (24") & Dolmar PS-9010 (36").
Big fresh 36+" knotty oak.

 

[sledneck22]

Well I got the saw buttoned up and ran a heat cycle through it tonight. No piss revs but ran it up and down and let it idle for a few minutes with periodical revs. Cylinder was warm and no issues. We’ll see if I’m lacking squish once I get it into some wood. (I think she’ll be fine).
Also: my solder measured .039 and pretty soft.

 

[Wilhelm]

Stock Dolmar PS-6400 (no MM either) with 20" B&C, MAXX PRO grinder ground/sharpened Stihl Rapid Duro 3 carbide chain (saved me a lot of sharpening downtime), 15+ cubic meters of oak a lot of it bone dry.
Never even a hint of lacking power needed for the job!
The PS-6400 deserves much more credit and love that she gets from the crowd.
I certainly love and appreciate mine!

 

[KingCobra98]

I wouldn't mind a 7900 but it would need to be Blue

 

[Squareground3691]

Orange & Black rule !!

 

[KingCobra98]

Orange & Black rule !! View attachment 349662

Curious. Is that a Dolmar badge saw or Makita?

 

[Squareground3691]

Curious. Is that a Dolmar badge saw or Makita?

Miller Mod Dolmar a real ripper

 

[KingCobra98]

Miller Mod Dolmar a real ripper

Looks nice.

 

[Squareground3691]

Looks nice.

Thanks. ported 79ers are strong runners.

 

[KingCobra98]

Thanks. ported 79ers are strong runners.

Would you say a ported 7900 is on par with a 390?

 

[Squareground3691]

Would you say a ported 7900 is on par with a 390?

Never actually ran a 390 , but that MM Dolmar is a screamer if you ever ran a ported one before.

 

[Squareground3691]

Would you say a ported 7900 is on par with a 390?

This MM Dolmar has been modified ported, carburetor been worked over , unlimited coil, timing advanced. It will put the hurt on a 390 I believe

 

[Wilhelm]

Orange & Black rule !! View attachment 349662

Beauty!
Although, it is "Fire Red" not "orange" please!

Steals and Huskies are orange.

Would you say a ported 7900 is on par with a 390?

In big wood there is NO replacement for displacement!
My best guess would be that a ported 7900 is speedier in small to mid size wood, while a 390 might be more built for torque and large wood.

I personally can compare a Dolmar PS-7900 (79cc) to a Dolmar PS-9010 (90cc), both stock with mild muffler mod.
24" bar on both and the PS-7900 is faster, 36" bar on both and the PS-9010 is the one pulling through the cut with more efficiency.
Talking round filed full complement, full chisel chains in beech, oak, turkey oak.

 

[Wilhelm]

Dolmar PS-7310, Dolmar PS-7900 , universal saws, will handle any bar length up to 36".
Dolmar PS-9010, big bar saw - You don't want to haul this beast around with a small to mid size bar.

 

[whitesnake]

Stock Dolmar PS-6400 (no MM either) with 20" B&C, MAXX PRO grinder ground/sharpened Stihl Rapid Duro 3 carbide chain (saved me a lot of sharpening downtime), 15+ cubic meters of oak a lot of it bone dry.
Never even a hint of lacking power needed for the job!
The PS-6400 deserves much more credit and love that she gets from the crowd.
I certainly love and appreciate mine!

View attachment 349645 View attachment 349646

Carbide chain? Boy we know who’s got the money now lol. Yes you are correct the 6400 is a good runner. A lot of people disown them because same weight as 79 and less power. But the weight doesn’t really bother me. Feels solid. And feels to have more grunt that most 60’s. And the option is always there to swap top ends. I have a couple 84cc top ends from hls when they had a sale. I know there is some hate on the aftermarket and not going oem 7900 but they were cheap lol. Hey, unclog that muffler!

 

[whitesnake]

I like those orange tops. Any of them floating around out there? I thought I remember someone selling new ones on here?

 

[Wilhelm]

Carbide chain? Boy we know who’s got the money now lol. Yes you are correct the 6400 is a good runner. A lot of people disown them because same weight as 79 and less power. But the weight doesn’t really bother me. Feels solid. And feels to have more grunt that most 60’s. And the option is always there to swap top ends. I have a couple 84cc top ends from hls when they had a sale. I know there is some hate on the aftermarket and not going oem 7900 but they were cheap lol. Hey, unclog that muffler!

Stihl PD3 & RD3 chain along with Stihl's chain storage boxes are about the only Stihl products that I can afford - that is the level of how broke I am!
Stihl Carbide chain is good as long as You understand what it is meant for - HINT: NOT for cutting stumps out of the ground.

The 6400 may have less power than her 73 & 79 siblings, but she makes it up tenfold in better manners and miles better fuel economy - I actually get tired by the time I spend a full tank of fuel on my PS-6400.

Compared to my 6100 my 6400 has loads more torque, I have learnt to appreciate that in the hard woods I tend to buck.

I got one or two "take off" 47mm top ends, I don't plan on ever being without my PS-6400.
I also own a NIB/NOS PS-7900 P&C kit, as well as an AM BB kit.
I keep looking for a good OEM 50mm take off, but none so far.

MMing the PS-6400/7300/7900 mufflers is easy, soft steel, just a bird cage inside.
I haven't modded my PS-6400 yet because I actually like her to be a little less loud for the wast amount of bucking I use her for. I can always swap the MMed muffler off my PS-7900 over if I ever so desire.