ORIGINAL: D Bronk
The thing with Castor oil is ,that it is cheap insurance, for those times, when things go wrong.
It`s up to you ,to decide if it`s more important, to have a clean plane ,Or ,a well protected engine, in a Oily plane.Unexpected things happen,and parts, for the Norvel engine are getting hard to get , around here in North America. What is the Availability ,of the Norvel engines and their parts like in your Countrys? are they easy to get ahold of? ... Dave
Red B. and D Bronk,
Thank you for advice.
Conclusion is that I will add some castor to my fuel.
Norvel engines are also not available in Japan now and I got my Norvels
at ebay recently. Of course I have no parts in stock even a new plug.
I hear that high nitro fuel makes the same power with richer mixture
than low nitro fuel, so I thought I could use it for that purpose, to keep
the mixture rich. It's more difficult to find good mixture in synthetic fuel
than castor fuel, but I thought I could do it by setting the needle a bit
less rpm from the peak.
I use 100% synthetic fuel for all my engines now, from .10 2 stroke to 1.20
4 stroke and it is not difficult to set mixture rich, however I will treat Norvel
engines with special care. I prefer oily airplane in this case.
Tsutomu Mabuchi