I've put 3 litres of 18 month old 30% Nitro, 10% Coolpower Blue oil through it and it's behaving itself very well considering it's essentially a new motor. Mixed up some fresh fuel today but it's a bit windy, so I thought about taking one of my other toys out when I spied the bottle of Maxima Castor 927 in the shed.

While corrosion hasn't been a problem for me when flying every week (see the old worn bearing how shiny it is), it's been a problem when I've put the plane away "as used" and 6 months (or more) suddenly goes by. The YS engine is full of rubber and silicone bits, and has it's fair share of steel bits that will rust (and seize) if they have the chance. So thinking out loud, I'm wondering if a quick ground run for a minute with a 0% nitro brew with Maxima castor might be worth a shot if I'm putting the model away for a long time? It claims to have an anti-corrosion package and it dissolves in methanol just as you'd expect castor to.

I've de-greased the bearing and swished it in the brew before putting it on a shelf in the shed, also have put some engine o-rings and silicone check valve diaphragm in the brew to see if they are affected by it. Time will tell.

Old bearing not too rusty

Supposed to have an anti-corrosion package?

See how long it takes to rust?

Assortment of silicone and rubber bits

Old 170CDI pump, filled and sealed.