Recent content by stihl #1

Actually testing with a DVOM is not valid anymore. That is an old pic I posted and I did not notice that comment. It is referring to the first M-Tronic, the MS 441CM in 2010. TI 01.2010 referenced a diagnostic cable: This could be used with a DVOM to do some ohms readings on the harness, switch...

As I said before, it is rare for the switch to fail but I don't know what the saw acts like if that is all that is wrong. What is the part number on your old module? I might have a spare if I can find the box... I was born and raised in Fort Worth so willing to help out a fellow Texan!

Glad I'm not in Illinois! Hadn't heard of that, so thanks a lot Micah, now I have one more thing to keep an eye on! LOL

Sorry, I put the wrong pic up for the M-Tronic. Here are 3 views of the M-Tronic: The charge winding is on the left, the primary is the large gauge wire with the secondary wound around it. The main capacitor is in between. See how the primary wires solder to the board. The secondary connects to...

This is an early CDI: This is a M-Tronic: You can't ohm out between the primary and secondary because the circuit board is in between them. I have never tried to compare readings from one known good module to another, so maybe there is something there but to my knowledge STIHL never documented...

Mark got me inspired to do something with the McCullochs in the collection, so I got them all out, culled the rough duplicates and parts saws out, cleaned up the rest and displayed them together. I took pictures of each saw, recorded the serial number and model number if present, got the years...

It might be the fuel injection path the fuel mix takes, but IDK for sure. The injector does aim the fuel mix right at the ramp as it mixes with the incoming air. Might be the difference between a few hundred hours of run time vs several hundred hours of run time. Won't know till you try. What is...

This is from the shop manual. I recall when I was in Germany for the intro of this saw that we were told the scavenging ramp was there to deflect the fuel oil mix up into the small end needle bearing, and prototypes without it had bearing failure with low run time. So the risk you take by...

It is interesting how many versions Pioneer made from that one design format. I assume the differences were in CC's? Cool that you still have a working primer. I looked at the exploded view and it looks like the diaphragm is cone shaped and would be difficult to duplicate. Here is what is left...

Well Basher, the NU 17 saga ends with it kicking my butt. As I went further into these two saws to try to make one good one things just started looking worse and worse. As I said before, they were used in training schools which is hard on them, with different people tearing them down and trying...

That thought crossed my mind but then I thought, "nooo they wouldn't do that!" This has been fun... Thanks Basher

Help Please! NU 17 bar studs The studs do not go through to the oil tank: They will not unscrew with a stud grip tool, or vice grips, so I used the blue tipped crescent to warm one up: Then let it heat soak a bit, and nothing. Three heat soak cycles and still nothing. Am I doing this wrong by...

I tried to send Jason a MS 361 deco plug cover a while back, put it in a padded envelope and mailed it from here in N FL to him in VA, a couple of bucks postage and he never got it. So I sent him another one, with a tracking number, now it is 8 bucks and he got it right away. So if Av wants this...

Mark, I saw the big cutter in another post, way cool. Amazing what was made over the years. And that saw is a beauty. Here is the part that started this discussion regarding the NU 17: Slight crack but some epoxy on the underside would solve that. I checked out the other saw I have and the...

I have been talking to Av8or3 about a spare NU 17 I have but now I am not sure if I want to break it down and I am afraid it would cost a lot to send the whole saw over to EU, so lets keep looking in case someone else finds one while I make up my mind. Great that we can all chime in with info...