Preventive maintenance?

[Fishinak]

Hello all
I have a 2005 200 hp ox66 (ss II) outboard. I am there is apprx 500 hours on the outboard. The OB runs great and I am NOT experiencing any cooling issues.
I have read a lot about the thermostats and poppet valve. My question is should I replace the tstats and poppet valve as preventative maintenance? Or since I have no issues, should I leave em alone.?
Btw at 4400 rims my h2o pressure is about 22.
I am also planning on replacing the lp fuel pumps, VST filter, water pump, and cleaning the O2 sensor. Any other preventative maintenance I should consider?
One more question. Best place to order parts?
Thanks in advance for any and all tips tricks and help!

[Fishinak]

really no replys?

Im just curious. Should I replace the poppet and the thermostats as prentative maintenece OR if it aint broke dont fix it?

[99yam40]

you can look at the stickies
one has what Yamaha recommends for maintenance
I would follow what Yamaha recommends

click on the red purchase Yamaha parts at top of page and order right here

[robert graham]

Probably best to go ahead and do all the items mentioned, then you have a "preventive maintenance base line/starting point"....

[rodbolt17]

really, you asked that?
I would say dog it till it dies.

there is a maint schedule in the stickies.

note the period is hourly OR yearly whichever comes FIRST.