Muffler mod advise, EA4300 Makita

[NPKenny]

40:1 mix ratio with Amsoil Sabre.

This saw goes into the rev limiter quickly. I tune it fat and slowly work into a proper tune because of the limiter. I have gotten away from using my tach on my Dolmar saws because of the way the coil limiter steps in.

 

[Ford3000]

Iv never done one without doing a full cat and mount removal as it takes very little time just to drill the 2 spot-welds and pop out the hole unit as one.
13000 rpm is the number I end up with as well...much after that the tac starts to jump around so I don't push for a leaner mix. I never grind out the gills but just straighten up the slots to give more flow and to keep a stock look without to much extra noise. I set each saw from basic settings , then....As long as the saw drops back to idle smartly with no cycling and picks up smartly from idle....hits 13000 free RPM with a slight 4 stroking and then , without the need to push much in a cut to take it out of any 4 stroking ....Im good ,if not ... I adjust L & H accordingly.

Hi @Simondo
What do you mean by “ as long as the saw drops back to idle smartly with no cycling “, this saw drops back to idle a little slower than the its mate, the only
difference I can see is the other saw is zippier off the line, it seems to go from idle
to full throttle a little faster.
May be I need to turn out the low a little more, and turn in the H a shadow.
I kept the screens and left the baffles behind the outlet intact, I was afraid of
loosing back pressure which it seems am bordering on with the saw I took the
whole cat section out of.

 

[Ford3000]

40:1 mix ratio with Amsoil Sabre.

This saw goes into the rev limiter quickly. I tune it fat and slowly work into a proper tune because of the limiter. I have gotten away from using my tach on my Dolmar saws because of the way the coil limiter steps in.

Hi @NPKenny
Do you think these saws would be hitting the limiter at 13000,
I don’t think I am because I made it all the way to 13600 with no hint
of it, nor was my meter going crazy like it does when a limiter kicks in.
The book says 13500 MAX, so I would hope the limiter isn’t being hit at 13000.

The first saw I did sits spot on 13200, which was factory set, I never altered it,
nor did my tach loose the plot.

 

[NPKenny]

Someone can chime in with the correct rev limited number, but I am fairly certain you can get closer to 14k than 13k. Without the limiter, I am positive mine would be in the mid 14’s, but I am not terribly concerned with no load rpm on this saw; it just runs and handles so well.

 

[huskihl]

@166
Do you have the rev limit specs of the EA4300?

 

[166]

@166
Do you have the rev limit specs of the EA4300?

13,500

13,000 is where most of them are happy at.

 

[Simondo]

Hi @Simondo
What do you mean by “ as long as the saw drops back to idle smartly with no cycling “, this saw drops back to idle a little slower than the its mate, the only
difference I can see is the other saw is zippier off the line, it seems to go from idle
to full throttle a little faster.
May be I need to turn out the low a little more, and turn in the H a shadow.
I kept the screens and left the baffles behind the outlet intact, I was afraid of
loosing back pressure which it seems am bordering on with the saw I took the
whole cat section out of.

If I have a 420/4300 that runs on / cycles down to idle ...then I would re adjust the tune .

 

[Ford3000]

@166
Do you have the rev limit specs of the EA4300?

Hi @huskihl
I don’t know the Rev limit of the coil, the manual says 13500 is MAX Rpm.

 

[Ford3000]

If I have a 420/4300 that runs on / cycles down to idle ...then I would re adjust the tune .

Hi @Simondo
This saw runs @13000, does not pull the engine down
like an overly rich engine does coming from full throttle to idle,
I would say if I set it @13200 it would be spot on, just don’t want to
go too close to the limiter I case of false readings, though so far no
irregular numbers on the tach.
I don’t quite understand what you mean by saw cycling down to idle.

 

[Wood Chopper]

Hi @huskihl
I don’t know the Rev limit of the coil, the manual says 13500 is MAX Rpm.

Coil limit is 13,500. If you’re seeing anything more than that, that’s weird


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[Ford3000]

Someone can chime in with the correct rev limited number, but I am fairly certain you can get closer to 14k than 13k. Without the limiter, I am positive mine would be in the mid 14’s, but I am not terribly concerned with no load rpm on this saw; it just runs and handles so well.

Am glad to hear am not at the limiter then, will be checking the saw today
with a fresh perspective.

 

[Wood Chopper]

Hi @Simondo
This saw runs @13000, does not pull the engine down
like an overly rich engine does coming from full throttle to idle,
I would say if I set it @13200 it would be spot on, just don’t want to
go too close to the limiter I case of false readings, though so far no
irregular numbers on the tach.
I don’t quite understand what you mean by saw cycling down to idle.

As far as the cycling down I believe he is referring to after a decent size cut in the wood the saw takes longer than usual to return back to Idle. As if the RPMs are higher longer back to Idle. A good sign that the site is Too lean. I think I explain that right


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[Ford3000]

Coil limit is 13,500. If you’re seeing anything more than that, that’s weird


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Hi @Wood Chopper
At 13000 and 13200 am on the safe side, will try and get the 13000 saw
up a shade and when I get some wood will re check.
My only real issue is the saw I removed the whole plate from is shade less
zippy than the other one.

 

[Ford3000]

As far as the cycling down I believe he is referring to after a decent size cut in the wood the saw takes longer than usual to return back to Idle. As if the RPMs are higher longer back to Idle. A good sign that the site is Too lean. I think I explain that right


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Would that be too lean on the top end, as this saw sits it’s only @13000
so I should not be lean, that is with the L also richen up a little.
If only I had a camera with a good mic I would post a video.

 

[Wood Chopper]

Would that be too lean on the top end, as this saw sits it’s only @13000
so I should not be lean, that is with the L also richen up a little.
If only I had a camera with a good mic I would post a video.

Either way your muffler is opened up and will run much better either way and if your tune right now is 13,000 on the high side I would stay there and run it
As steve said above these saws are pretty happy right there


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[Ford3000]

Either way your muffler is opened up and will run much better either way and if your tune right now is 13,000 on the high side I would stay there and run it
As steve said above these saws are pretty happy right there


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Thanks @Wood Chopper, going to check the saw now from cold start right through to wot max, a fresh look may reveal what am probably missing.

 

[Simondo]

Hi @Simondo
This saw runs @13000, does not pull the engine down
like an overly rich engine does coming from full throttle to idle,
I would say if I set it @13200 it would be spot on, just don’t want to
go too close to the limiter I case of false readings, though so far no
irregular numbers on the tach.
I don’t quite understand what you mean by saw cycling down to idle.

From full throttle to idle. "Cycling down" :The same sound you get just as a saw is about to run out of fuel without it fully doing so.....then it finds idle speed.

 

[Ford3000]

From full throttle to idle. "Cycling down" :The same sound you get just as a saw is about to run out of fuel without it fully doing so.....then it finds idle speed.

 

[Ford3000]

How does one upload a video, it won't attach as a file.

 

[Ford3000]

Trying to add a video, see no way to other than have it on a server and link the URL, which I have none of.
The saw started today from cold, two pulls on choke, and fired on the first pull after, so a little rich, I tried all I could to get the saw to speed, it made 12500, I leaned the H and have left it at 12960, it holds this setting while running and doesn't pass it, if I turn the saw off, it will rev to 13300 initially, then it will settle back to 12960.
The saw when started from cold takes about six presses of the throttle to get up to speed, it was like this from new. I never touched the idle, but the saw came down to 2600 or so, it also tries to turn the chain at idle even though idles lower than spec.
There was also a slight moisture on the inlet to the carb but not much.