Always more than one way to skin a cat
I thought about just pulling the alloy cap and then giving the screw a half turn and then putting it back that would then not let me close the screw not a problem and the new full open position would be 1 1/4 turns out instead of 3/4 out.
I might have had to do this a couple of times to find the right amount of "bias" or "zero elevation". You would have to right it down or have a really good memory to know how much the screw was backed out.
This method will work
Brads ported MS261 saw is turned out 2 1/2 times I think.
Drilling out the center of the alloy so you can access the Allen key will also work, Eventually the White plastic part of the limiter would likely strip and not have the interference fit that it has now.
When you back this screw all the way out you can fell the plastic spline skipping over the metal spline of the High Speed screw.
This will work and you might even be able to freshen up the spline in the white piece of plastic if it becomes a problem by dropping it in a cup of boiling water " same way you can make a nyloc nut tight again".
I chose to do it the way I did
I did one mod once, I wont have to pull it apart again at a later date, after a muffler mod or porting etc.
I will be able to screw the screw in and count how far out it was, I don't have to write it down or remember anything. You might want to check this after doing a muff mod, and then re-tune the saw. The need to richen it up is evidence that it is breathing better and making more HP. e.g "after the muff mod I had to turn the H screw out a 1/4 turn"
I decided to post what I did after filling off the rib on the alloy screw plug and found out that more work was required. That is the reason there is no before picture of the rib on the alloy plug.
I read as much as I could and looked for pictures, poked and prodded the carby on the saw, scratched my head before doing it my way.
I will be very interested in how long the internal spline lasts on the white plastic on anyone who drills out the center of the alloy plug.
I think I might be surprised
The 2mm Allen key is 2.22mm from point to point so a 2.5mm, 3mm, 1/8th drill bit is all you need for clearance
May be a moderator will put this with the other limiter threads in the "chainsaw FAQ" sticky :msp_rolleyes: