Jug Temp with different arrestor screens and no screen -MS661

[redfin]

Mine is just about there ...........
I am running a Max Flow - have you tried that yet ?

So ............ do you think I will see some more from the saw with removing that little bit left in there ?

Looks like I took mine a little further back, and I also altered the final opening on mine ........

It has more area than the port (including the restriction of the screen). Happy with what it gained. I will be porting it after I clear a few saws ahaed of it.

 

[Chainsaw Jim]

Some states have laws governing spark arrester screens.....

OAR 629-043-0036

Power Saws

Pursuant to ORS 477.640, all persons operating a power saw

shall comply with the following fire prevention and suppression

requirements:

(1) A power saw used to conduct an operation shall be equipped

and maintained with a spark arrester and other fire prevention equipment

that is listed in the most recent edition of a publication of the

National Wildfire Coordinating Group, entitled “Spark Arrester

Guide” and which is known as publication number “PMS 430-2.”

(2) A power saw not used to conduct an operation shall be

equipped as follows:

(a) As described in subsection (1) of this rule; or

(b) With a spark arresting device constructed to retain or destroy

90% or more of the carbon particles having a major diameter greater

than 0.023 inches (0.584 mm). A spark arresting device equipped

with a woven screen with a maximum opening size of 0.023 inches

(0.584 mm) constructed of 0.013 inches (0.330 mm) or larger diameter,

heat and corrosion resistant wire will be considered in compliance

with this requirement, provided the total screen opening area

is not less than 125 percent of the engine exhaust port area. The

device shall be constructed to permit easy removal and replacement

of the screen for field inspection, replacement, and cleaning.

(3) The following minimum fire tools and fire extinguishers

shall be immediately available for the prevention and suppression of

fire:

(a) One fire extinguisher of at least eight ounce capacity; and

(b) One round pointed shovel which has a face not less than 8

inches wide and a handle not less than 26 inches long.

(4) A power saw shall be stopped during fueling and moved not

less than 20 feet from the place of fueling before being started.

(5) All fire prevention equipment, fire extinguishers, fire tools,

screens, shovels, spark arresters and spark arresting devices

referred to in this rule shall be kept ready for immediate use.

(6) The forester may, in written order, reduce or waive any

requirement of this rule if, the judgement of the forester, conditions

so warrant……https://odfnet2010.odf.state.or.us/AgencyMgmt/Lawbook/OAR_ODF_629_2015ed_web.pdf

 

[Deets066]

Never had the DNR stop me and ask to inspect my saws, but I don't cut professionally either. If I did it for a living I would have some wide weave, not like that **** that Ted posted either.

 

[Deleted member 83629]

yeep lol wide weave

 

[spindrift7mm]

Deets the last 2yrs out here they been checking exhaust on everything. FS and Fish & Game are the worst ! The standard screen test in the field is if a ball point pen tip passes thru the screen it's to big. Ken

 

[Deleted member 83629]

i cut on my own land so they wont bother me.

 

[olyman]

i cut on my own land so they wont bother me.

you cut, shovel, and shut up????

 

[Deleted member 83629]

nope water hose.

 

[Four Paws]

Deets the last 2yrs out here they been checking exhaust on everything. FS and Fish & Game are the worst ! Ken

That's because your state doesn't need any more wildfires.

 

[Four Paws]

Weave. I'm not sure how wide this weave is but could you attach it to your saw and see how it affects the heat? Thanks.
View attachment 445312

I wonder if she likes her hair pulled?

 

[Mastermind]

You sure have got lots of time to waste.....

 

[NWCoaster]

You sure have got lots of time to waste.....

First test I have seen where someone actually showed direct results that opening the exhaust lowered cylinder temperature.

 

[Mastermind]

We didn't need a test to know that.

 

[NWCoaster]

We didn't need a test to know that.

Cause everything on the internets is true..... Al Gore says so.... Lol. Just like HP1 at 32 to 1 is da best......

 

[Mastermind]

Ya got me there, at least in the A/T and M/T saws. It did great in the "normal" engines though.

 

[Mastermind]

You still planning on ruining me?

Or did you get over that?

 

[Deleted member 83629]

I run 32:1 in my 545 it works just fine as long as it is not H1R

 

[Mastermind]

I'm just giving you a hard time Shane. I'm not holding any grudges.

Plus "I have a potty mouth".

 

[bwalker]

First test I have seen where someone actually showed direct results that opening the exhaust lowered cylinder temperature.

Timberwolf did a very simular test back in 2003 iirc.

 

[NWCoaster]

You still planning on ruining me?

Or did you get over that?

I don't think it is possible to ruin a guy that does the quality of work that you do..... I am very respectful of the professional work you show us here on this site. ( All joking aside )