I have a strato Ms 391 and a Husky 3120xp I recently removed the limiter caps from the 391 and I'm having a hard time tuning it by ear for the -High- I was almost 2 turns out for 4 stroking by my ear,I have good hearing but not that sensitive to sound change. I initially was going to tune by tachometer and slightly richen the mixes but my cheapo tachometer is jumping 600+/- rpm so I left the saw as is until I receive my new tachometer in the mail.
Here's my questions:
*********-If I increase the oil ratio in my ms391 and tune to spec rpm (idle/under factory max) is it still getting adequate fuel at that rpm being a slightly more viscous mix?*********
-My 3120xp seems to run rich based on exhaust and plug knowing that the European manual states 33:1 for proper mix and I've been running 50:1 if I just switched to 35/40:1 would that be okay and possibly run more lean?
I want a richer mix because these saws will be used for milling the 391 very small logs and the 3120xp for everything else.
Here's my questions:
*********-If I increase the oil ratio in my ms391 and tune to spec rpm (idle/under factory max) is it still getting adequate fuel at that rpm being a slightly more viscous mix?*********
-My 3120xp seems to run rich based on exhaust and plug knowing that the European manual states 33:1 for proper mix and I've been running 50:1 if I just switched to 35/40:1 would that be okay and possibly run more lean?
I want a richer mix because these saws will be used for milling the 391 very small logs and the 3120xp for everything else.