Having used primarily Husky's for several years, I had forgotten the small rub I have with Stihl.
Which is the case guard design around the bar oil, and also the fuel area.
Husky is pretty flat and easy to clean prior to removing the cap. Wipe it clean with a tooth brush, partial turn of the cap and repeat with tooth brush. Done.
With Stihl same procedure, however, there is always chips and crud around the cap rims when removed that needs wiped out carefully with a finger. With the fuel slight overfilling flushes it away, but I intensionally try not to overfill. With the oil tank there is always a chance of a chip or grit getting in the tank.
I had an 042 as a single saw for years. Then added ab 021 for small stuff. It, the 021, is over twenty years old. The 042 was 25 years old when replaced with the 357xp, now 12 years old. Hmm. The years are adding up!
A plus about Stihl for non mechanics like me, is that there are dealers/shops about everywhere.
I'm pretty sure Whinbush was right on my part. Either fuel issues or operator error. Probably both, and I really did not need the 500i.
The 661 and 357 are for sale, and the 562xp, 500i, and 021 stay. I simply don't use the 661 enough except for occasional noodling since I sold the TW-6 splitter and went back to purchasing 100" length log loads. The 500i replaces both the 661/357xp slot.
Back to cutting/splitting.
Thanks for all the input on this thread. Crane