Hose from water Pump

Good flying. Have fun.

Hi Roger,

FYI -

Until just a few years ago the best coolant (meeting European car standards) for Rotax 9's was not easily available in Australasia - as a result most people used Castrol Radicool NF (Green). There are other manufacturers (eg Nulon) that have products meeting the same standard. 

I changed my Green coolant every 2 years or 200 hrs. 

We now have access to Castrol Radicool SF (Red) which meets/exceeds Rotax standards. Fortuitously it is also used in most of my ground based vehicles.

Both Red & Green are available as premix.

Being a "control freak", I choose to purchase "concentrate" and mix to the recommended 50:50 using water I know to be of the required standard of purity.

Changing the coolant every 200 hours/2 years (using your methodology) means that no "flushing" will be required.

it is not particularly easy here to find hoses in diameter 17 mm but by looking carefully, and hoping that it is indeed 17, we find some.

Very often traders sell 16 X 24 EPDM

Lots of people install 16 X 24 on their Rotax (which I wouldn't...of course!)

The 16 X 24 is sold, 7.80€ for one meter long.

The Rotax distributor sells the hose cut to 36 cm 58.95€ plus shipping, that's why a lot of people install 16 X 24

I even found a tradesman who gave me the hose the length of the damaged one (but 16 X 24).

This is the reality of business.

BUT : It' fun to fly !