Author Topic: DOLMAR 6800  (Read 1479 times)

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Offline 660magnum

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Re: DOLMAR 6800
« Reply #10 on: March 24, 2013, 04:29:54 pm »
My 6800 has a 20" X 3/8" RSC and a 7 pin rim. The bar looks like a Oregon Power Match - little angled oil holes and all but it says Dolmar. I assume it is original but I didn't know they had the tiny angled oil holes in the late 90's? The bar is not the current Dolmar graphics with the little square design that fades away at the tip like on my 7900's and 5105's.

The 6800 is 49mm bore X 36mm stroke

The bar is small mount Husky.
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Offline Cut4fun

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Re: DOLMAR 6800
« Reply #11 on: March 24, 2013, 04:45:23 pm »

The 6800 is 49mm bore X 36mm stroke

The bar is small mount Husky.

I think the 702 is 50mm bore x 36mm stroke horizontal cyl though.  D176 or D009 work on it.
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Offline 660magnum

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Re: DOLMAR 6800
« Reply #12 on: March 29, 2013, 03:59:24 pm »
To go along with what RMS61Moparman and Old Iron Logging said about the starting characteristics of the Dolmar "i" series chainsaws . . .

I went to start my 6800 this morning around 9:30 with the temperature around 35F and it started 1st pull and had not been run in 4 days.

After it had run 5 seconds or so I turned the choke and the fast idle off.
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Offline 660magnum

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Re: DOLMAR 6800
« Reply #13 on: March 30, 2013, 03:09:01 am »
Cut4fun and I ran the Dolmar 6800 on Friday afternoon. It didn't start first pull when cold but started the 3rd pull.

Cut4fun wanted to see how it compared with his Echo 702. The 702 has a one mm larger bore. It is a older torque engine and runs a 8 pin rim.

So one would have to take the torque factor into consideration when comparing a Dolmar 6800 with a Echo 702..

The Dolmar held a pretty high rpm in the cut. But to watch the saws while cutting, I think they cut about the same even though the Dolmar sounded faster.
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Offline farmboy

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Re: DOLMAR 6800
« Reply #14 on: March 30, 2013, 08:47:28 am »
Just for info I have a couple of NOS 6800 pistons.
Shep

Offline 660magnum

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Re: DOLMAR 6800
« Reply #15 on: March 30, 2013, 09:59:03 am »
Now you tell me.  But I guess I didn't ask?

The Meteor was $35 shipped and a beautiful piston except the lower corners of the skirts were cut off (never there - as cast) at an angle. Stock configuration it didn't hurt anything.

The 6800 sure runs good.

I know where there is another OEM NOS bare Cylinder for $100.
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Offline 660magnum

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Re: DOLMAR 6800
« Reply #16 on: May 06, 2013, 08:02:52 am »
Used the 6800 Dolmar to drop a diseased Black Ash (emerald ash borer) that was about 18" DBH and 50' high. The drop went flawless. Was guided by a 7/16" Dacron polyester double braid rope attached to my 4WD truck due to being adjacent to the triplex electric service drop. The wind was in my favor for the drop. The top quarter of the tree was dead and shattered in hundreds of pieces when the tree hit the ground. The faller had a safety helmet because of the dead limbs, chaps, and gloves. I did the truck.

Went to do the stump and the Dolmar quit on me about 1/4 through when I backed off the throttle. Couldn't get it restarted readily so I finished the stump with a Husqvarna 365 Special - I have CAD.

Cut4fun stopped by and cut up the trunk with the Husqvarna 365.

After everything was cleaned up, the Dolmar 6800iH started up 1st pull with the choke off so it must have been flooded?

The limbs were mostly done with my Dolmar 111i W/3/8" X 16" that I put the Brison model airplane engine cylinder and Meteor domed piston in. I also had a Stihl ported 026 W/3/8" X 16 and Stihl 025 four port, MM'd, W/.325" X 16" that I personally used just to give the saws a little use.


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Offline Cut4fun

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Re: DOLMAR 6800
« Reply #17 on: May 06, 2013, 12:28:35 pm »
Thanks for the ash tree  8). That will make some good test wood and bonfire in the future.
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Re: DOLMAR 6800
« Reply #18 on: October 15, 2013, 02:25:15 pm »
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Re: DOLMAR 6800
« Reply #19 on: October 15, 2013, 03:07:28 pm »
The 6800iH is a 1997 model that was originally a 6000iH. It was purchased at the local dealer by a firewood guy. After a few years, he traded it in on a new 6400. After the saw sat around a year or so at the dealer, I bought it and eventually found a new 6800 cylinder and with a new Meteor piston/Caber ring, made a 6800 out of it. It is low time and has the original bar. In the video it had a square ground Stihl RS33 chain. Otherwise it is completely original.

The 6800 was only sold some 4 years. It is a 120S with a different brake. The piston/cylinder are the same as on a 120S. The bar mount comes from the factory with the small husky mount studs but you can still get larger studs for the bar mount to use the large Husky bar like on a 372 or 7900 or a Stihl bar like on the 026-066.

The cylinder is closed port with windowed single transfers. The piston is a window piston. Due to the layout of the muffler bolt holes, the port positions, and the piston skirt width, these saws do not lend themselves to a lot of porting. But they run pretty good the way they are.
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