Stroking a Dolmar 7900

[WKEND LUMBERJAK]

Yup........ Of my 10 th tree! [emoji12]

Liking the Dolmar.

 

[RI Chevy]

It is pretty nice. Just trying to get used to it. Very different power delivery than my Stihl's.

 

[WKEND LUMBERJAK]

6100 has a good power band what length bar are you using

 

[mettee]

It is pretty nice. Just trying to get used to it. Very different power delivery than my Stihl's.

You need a ported 7900 with a solo crank

 

[mettee]

Hell I think I need one

 

[Deets066]

You need a ported 7900 with a solo crank

Hell I think I need one

Or just buy a solo...

 

[mettee]

Possible.

But I need another saw like I need an extra hole in the head.

Once I sell one or two maybe I can think about it.

 

[mdavlee]

Or just buy a solo...

Best answer. Did he ever get a price on 681?

 

[Deets066]

Best answer. Did he ever get a price on 681?

Back ordered last I knew, but I believe he said 980?

 

[mettee]

980 is a lot.


I think I'll do a custom piston instead

Eta: heck a solo crank is only 100 smackers

 

[RI Chevy]

6100 has a good power band what length bar are you using

20

 

[huskyboy]

20

It can be hard to dial in a rev limited ported saw if your not used to it. Fat will kill the power and too lean will kill the saw obviously. Using your tach, try tuned right where it bumps the limiter and see if it likes that. If it does then lean it 1/8 turn and test again.

 

[drf256]

It can be hard to dial in a rev limited ported saw if your not used to it. Fat will kill the power and too lean will kill the saw obviously. Using your tach, try tuned right where it bumps the limiter and see if it likes that. If it does then lean it 1/8 turn and test again.

Or make it fat, and tune in wood. That’s how I do it. Lean it to the point where it stops blubbering.

A limited coil will protect a saw, that’s why they did it. The misfire above a certain rpm will cause fresh mix to be drawn in, but won’t be burned. It’s not totally idiot proof, but it does work.

 

[huskyboy]

Or make it fat, and tune in wood. That’s how I do it. Lean it to the point where it stops blubbering.

A limited coil will protect a saw, that’s why they did it. The misfire above a certain rpm will cause fresh mix to be drawn in, but won’t be burned. It’s not totally idiot proof, but it does work.

+1

 

[RI Chevy]

It is very different than tuning my Stihls, thats for sure. Hard to tell if it's stroking in the cut or the rev limiter is kicking in or both.

 

[Mastermind]

It is very different than tuning my Stihls, thats for sure. Hard to tell if it's stroking in the cut or the rev limiter is kicking in or both.

It's never gonna fatten up enough to get off the limiter. Drilling the passages in the carb can make it impossible to tune lean enough.....so, I just drill the seat.

If you fatten it up out of the wood till you hear the tone change, it's gonna be a bit too fat. So....take it there, and go back toward the lean side just a taste.

Clear as mud?

LOL

 

[Dub11]

It's never gonna fatten up enough to get off the limiter. Drilling the passages in the carb can make it impossible to tune lean enough.....so, I just drill the seat.

If you fatten it up out of the wood till you hear the tone change, it's gonna be a bit too fat. So....take it there, and go back toward the lean side just a taste.

Clear as mud?

LOL

Yeth.

 

[RI Chevy]

Thank you.
I never had a "rev limited" saw before. Lol

 

[mettee]

I love all the little nuggets of wisdom that get dropped all over the place at OPE

 

[mettee]

Oh, and happy turkey day all you giblets