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Sorry Bart but you are getting this way more complicated than my little brain can handle. The STIHL tool is made by Thexton and I adopted it because it is calibrated with one gauge for percent of leakage and the other to see the incoming air as adjusted by the regulator. It is designed for use...

If you are doing a leak down test on a four stroke it doesn't matter what the shop pressure is, just zero the gauge before you hook it up and then read the percent of leakage and locate where with your ear. For a two stroke that is failing the vac pressure test on the crankcase, hook it to the...

I put this leak down tester, 5910 850 0300, in Service for STIHL back in 2004. It is calibrated for small engines so it doesn't over pressure the engine like an automotive tester would. See attached for instructions on using it for the STIHL 4-Mix engine as well as how to use it on two-stroke...

I would be curious as to what any experienced square ground users and filers think of the STIHL file explained in the attached tutorial.

Use the prev and next buttons and all the new 36 volt products are listed at this website. Sorry if this come over as a sales pitch, but I am just sharing what I know, and the 36 volt stuff is very impressive. The saw cuts good, the trimmers are easy to use and have good performance. The blower...

This is what detonation looks like. The piston is melting away and splattered around and starts wiping up and down the skirt.

I feel regarding any change to the ports, the margin for error is very slim on this saw. You may or may not see a noticeable change in power but you will probably see a drop in fuel economy, if that matters. The best tach nowadays is the Sendec, and it will work on these new microprocessor...

Al what it is doing is putting a layer of clean filtered air between the fresh fuel mix in the crankcase and the left over ex gases in the combustion chamber, so the air scavenges the ex out and holds the fuel back for the fraction of a second it takes to let the piston come up and close the ex...

I don't know if I will put to rest the discussion on this piston but Brian sent it to me and I have studied it up close and personal and passed it around at work to some of the guys that work with me in the tech dept. and we all agree that it is FOD (foreign object damage) and not a carbon ball...

Magnus, I weighed a 201 prototype we were doing a tear down on before it was taken apart and that is where I got my info. I am confident it is not a pound heavier.

I just checked these numbers and the weight shown here is wrong, it is for a 201 rear handle. The T version is only a few ounces heavier than a 200T and does have .2 more power, so it is not as bad as this post from arbtalk is implying, for whatever that is worth.

You just have to make sure it is at the same depth and there is a little symbol cast in the case to show how to orient the pump before it is pressed in. There is a slot in the pump and it matters where it ends up.

The oil pump is pulled out from the bottom with no need to split the case. It is threaded, so screw a metric bolt in, 5mm I think but I am not sure, but it is the common STIHL torx bolt thread. I use a slide hamer with the bolt in it to pull it, or you can use a sleeve and washer and pull it up...

STIHL has some oversized bar studs for both plastic and alloy that work well to save a tank housing.

Put 'em on eBay... I saw a post there where some dude had 10 STIHL bar nuts up for sale and the bid was at $13 2 days before it closed! Man I'm rich if I could get that for all the nuts I have stashed on the bench! Oh, you were talking about gas caps nut nuts. Oh well put them on eBay too! Real...

Hi guys, The nut can be replaced with a new special tool. I just got the tool but have not tried it out yet. I suspect that more new saws will use this feature as they come out. I heard somewhere that the captive nut was being mandated by some country somewhere so STIHL is just going to use it...

Oregon sold this stuff in the '80s on Poulans and Macs, we always called it Barricuda chain for some reason I can't recall, as I don't think Oregon ever called it that. It did not work well at all. I converted gobs of those saws to PICCO chipper chain. The first time you sharpen it it will cut...

A few answers..maybe... I have been too busy to do much browsing and posting and finally sit down to get caught up, and see the MS 200 carby is still driving everyone nuts. So maybe I can shed a little light on some of the topics that have come up in this thread. First a little history- As I...

Almost did, but I figured it out...Butch left some clues lying around! LOL Like the new diggs, Butch!

Well I have been sooo busy and away, sorry. PM me your address if you have not found that fitting and I will get you one in the mail. Eddie