So I called Stihl this morning and got some up to date info on solenoid and coils for the mtronics. I will try and keep this clear as mud for ya's.
first gen solenoid = Black - pn# 0000 120 5110 - should use with black fuel filter
current gen solenoid = White - pn# 0000 120 5104 - should use with orange fuel filter
new exploratory solenoid that apparently has now been scrapped = Green - pn# 0000 120 5111
orange fuel filter, white solenoid and new coils have 2yr warranty. After that it sounds like stihl will replace parts but you will have to pay labor.
If you have problem on the -
MS241 - he didn't have any info on the 241 yet.
MS261 cm - replace black solenoid to white solenoid and black fuel filter to orange fuel filter. (they are coming out with a kit for this (contains white solenoid and orange fuel filter) Use "RESET" (90sec choke, 60 sec idle, 5 cuts). There are no gen3 control modules/coils thus you don't use "Calibration" (30-40sec choke, 20-30sec WOT, let off after it goes from max to scream back to max
)
MS362 cm - same as 261 above.
MS462 cm - all 462s have gen3 control modules/coils, white solenoids, and orange fuel filters. So obviously stick to doing "Calibration" and replacing white solenoid and orange fuel filter with a white solenoid and orange fuel filter.
MS661 cm - little more complicated on the 661...
If control module/coil = 4700c 4700d 4700e(gen1) 4701a(gen2) - then must stick with black solenoid, black fuel filter, and doing the "RESET" (90 sec choke, 60sec idle, 5 cuts). You should not inter change any of the parts ...apparently problems with doing so. For example a white solenoid with 4701a coil and black fuel filter.
If control module/coil = 4702 4703 4704(gen3) - then must stick with white solenoid and orange fuel filter. And of course you do a "Calibration" not a "RESET".
There is a kit specifically for the 661 which includes the ver3 coil, white solenoid, and orange fuel filter 1144 007 1801
