DOLMAR/MAKITA The Official Sachs Dolmar Dolmar Makita Dolmar Chainsaws Thread

[Wilhelm]

12,800 limited coils should be illegal!

I don't see why!
What work saw will actually hit 12.8k under load?

 

[Desko74]

The saw should be set to optimal/safe rpm in the factory, but variables like altitude and choice of fuel can and will influence the carb tune.

General consensus is to tune the saw under load while making a bucking cut!
The engine should 4-stroke (burble; brap...brap,,,brap) when the load is lifted, but clear up to a continuous tone when loaded (eeeeeeeeeeeee).

I personally tune by tachometer to max engine/coil rpm, this makes these saws run on the rich side when they have a muffler mod.
I am rather safe than sorry.
Also, I tend to switch between 18/20/24/36" bars without re-tuning - the richer tune makes me feel safer when utilizing the 36" B&C setup.

Please keep in mind that the coil limiter only prevents/protects Your saw from OVER REVVING, the coils rpm limiter will not protect Your saw from running too lean as the "in cut" rpm's are considerably lower than the coils max rpm!
This is regarding a factory stock saw with only a muffler mod.

If any of the above is incorrect I am certain someone more knowledgeable than me will chime in and correct me!

Based upon your experince, if I tune the "H" 1/4 counterclockwise in the begining, it is a safe operation?
I think it is.

After retune to 12.600-12.700? It's a good way?

 

[Wilhelm]

Based upon your experince, if I tune the "H" 1/4 counterclockwise in the begining, it is a safe operation?
I think it is.

After retune to 12.600-12.700? It's a good way?

Sorry, I never pay attention to how much I turn those carb set screws/needles.
I just watch the tach and listen to the change in sound of the engine.

As I mentioned, I like to keep them tuned conservative and I rarely ever re-tune them.

 

[Sagebrush33]

Although I'm happy with the performance of my 7910, I want to get a tach and I need to find out which coil is in it.
ait was 4 strokin a tad in the wood so I tweaked the H screw just a wee bit. Sounds good now but I still want to know what she's spinnin at.

Time to dig for some info.

 

[Desko74]

Wilhelm,

I made the exhaust outlet larger. But don't you think...is it too large??



I saw on fotos.....Yours are not small.

 

[Wilhelm]

Wilhelm,

I made the exhaust outlet larger. But don't you think...is it too large??
View attachment 316357 View attachment 316356 View attachment 316355 View attachment 316358


I saw on fotos.....Yours are not small.


View attachment 316354

That looks fine, and on this forum there is no muffler mod too big for a saw!

Can You still utilize the spark screen?
It will make a little back pressure, and it will keep foreign objects from entering the muffler.

I think Your saw will do good with that mod.

 

[Desko74]

That looks fine, and on this forum there is no muffler mod too big for a saw!

Can You still utilize the spark screen?
It will make a little back pressure, and it will keep foreign objects from entering the muffler.

I think Your saw will do good with that mod.

Ohh, thank You!

I do use spark screen,of course.
This is the final.

 

[av8or3]

Which of the Dolmars (Makitas) have catalytic converters on them?

 

[PA Dan]

Which of the Dolmars (Makitas) have catalytic converters on them?

I know my 5100 and 5001 both had them.

 

[Johnmn]

Which of the Dolmars (Makitas) have catalytic converters on them?

I know my 5100 and 5001 both had them.

That the 421/4300's and the 6400/6401/6421's

 

[PA Dan]

That the 421/4300's and the 6400/6401/6421's

My 6421 was an empty can I believe.

 

[Wilhelm]

Which of the Dolmars (Makitas) have catalytic converters on them?

I believe it is greatly market dependant.
My:
PS-5105 - CAT
PS-6400 - bird cage
PS-7300 - bird cage
PS-7310 - SLR tube
PS-7900 - bird cage

I need to check the others.

 

[Wilhelm]

Ohh, thank You!

I do use spark screen,of course.
This is the final.

View attachment 316377

Looks good.
Did You weld the halves back together?

 

[Desko74]

Looks good.
Did You weld rhe halves back together?

Thank you!
welded.

 

[Desko74]

I believe it is greatly market dependant.
My:
PS-5105 - CAT
PS-6400 - bird cage
PS-7300 - bird cage
PS-7310 - SLR tube
PS-7900 - bird cage

I need to check the others.

PS-7910- SLR

 

[av8or3]

I believe it is greatly market dependant.
My:
PS-5105 - CAT
PS-6400 - bird cage
PS-7300 - bird cage
PS-7310 - SLR tube
PS-7900 - bird cage

I need to check the others.

What is “birdcage” and SLR? I don’t know what they are. Thanks. BTW!

 

[mettee]

What is “birdcage” and SLR? I don’t know what they are. Thanks. BTW!

Cat Internals

Cage

 

[SOS Ridgerider]

From what I can remember about the cats in the mufflers, the PS421 and equivalent Makita models, PS5105 and equivalent Makita models, and DCS6421/newer PS-6400 all have them. Basically the all stainless mufflers have them. Anything with a half stainless/half galvanized, or fully galvanized have been either just baffles, or SLR in the 7310/7910, from what I’ve seen.
The older saws like PS-6400/7300/7900 and DCS6401/7301/7901 did not have them. I could be wrong. It’s happened before. Lol.

 

[Johnmn]

From what I can remember about the cats in the mufflers, the PS421 and equivalent Makita models, PS5105 and equivalent Makita models, and DCS6421/newer PS-6400 all have them. Basically the all stainless mufflers have them. Anything with a half stainless/half galvanized, or fully galvanized have been either just baffles, or SLR in the 7310/7910, from what I’ve seen.
The older saws like PS-6400/7300/7900 and DCS6401/7301/7901 did not have them. I could be wrong. It’s happened before. Lol.

I believe you are spot on Sondre

 

[av8or3]

Thanks all. If you come here with a direct question, you can count on an abundance of help