cooling overflow bottle
i own a 914 rotax ,i have new little problem
my pink coolant go in my overflow bottle but dont go back on they engine
i check all my hose and attach nothing goes wrong
how can i find it the problem
by bill martin » 13 years ago
by Roger Lee » 13 years ago
Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell
by RICHARD DUPONT » 13 years ago
by david bonnar » 4 months ago
Related but new thread.
My 912ULS overflow hose is milky white hard plastic. I want to replace it but can't really identify the part # from the IPC (no photo of a bottle like mine and no photo of a hose). Auto parts stores don't seem to stock this hard, vacuum, high-temp hose. Any help appreciated.
Bottle is top spout, with the hose just shoved into the cap.
by Sean Griffin » 4 months ago
David,
Any good quality coolant hose (sometimes called heater hose), of the correct ID, will do the job - it need not be translucent/clear.
I preferer Gates hoses.
To allow for engine movement/vibration, you should use a flexible hose (not hard plastic).
See: https://legacy.rotaxowner.com/si_tb_info/serviceinfo/si-pac-009.pdf
For the expansion reservoir (bottle) to work correctly it must either have top fitting like this:
or a bottom spigot/barb similar to this Rotax style one:
A transparent bottle, where you can check the fluid level is best.
Make sure your bottle has sufficient capacity (see Rotax reference above)
In all cases, the top of the bottle must have an open to atmosphere hole/spout.
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