Originally Posted by
korey
Yep, I found this too. Replaced all 16 with SP-526 (CYFS-12-FP) and put 100 hours on it this season. I did notice an improvement in idle when I made the change.
I also kicked and cussed and and contorted my way in to change the fuel filter @ 300 hours. Not worth it. I cut the used filter apart and it barely does any filtering. Unless you suspect it's clogged, it's not worth the effort to change it - which requires loosening the starboard (drivers) side Cat and risking the V-band exhaust gasket.