After reading on Evans site, I gave them a call about the radiator cap. I have
a 1.2 bar
cap, and Evans said to not use it, the max. upper limit, use the .9 bar cap.
I never read this in any Rotax instructions, Lockwood is looking into.
Anyone out there flying with a 1.2 bar cap?
Thx.
Ron Parigoris
BTW got to the bottom of the makeup of their coolant:
NPG is all Propylene Glycol, and can be used on race tracks that ban ethylene
Glycol
NPG+ is a blend of Ethylene Glycol and Propylene Glycol with some proprietary
additions.The
can of NPG+ says on the label that it is Ethylene Glycol based
Rotax says in an emergency you can add Propylene Glycol but need to change it in
15 days.
Evans said in an emergency, you can if there is at least 50% remaining NPG+
either
propylene Glycol (hard to find) or Ethylene Glycol. Best to drain/flush with
prep
fluid as
soon as you can and refill with NPG+.
Evans said if there is more than 50% gone, then drain it all out and fill with
a 50/50 mix.
I would follow rotax max. temperatures that will be less than with Evans, watch
what cap
you have as the .9 will allow less heat compared to the 1.2. When you get home,
drain and
fill with water and run engine. Drain water and fill with prep fluid, Prep fluid
is heavier
than water/antifreeze so you can get rid of undesirable water/antifreeze from
high
point
before you drain it.
I talked with rotax service center, and will follow fill and drain new motor
with
prep
fluid to be certain.
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