1997 GTX off season rebuild start.

[AquaEye]

Satisfied with oil injection study so on to the next endeavor.
This concerns the lubrication of the RV gear cavity. Lurked around a few of the Rotax/aviation forums & also called a few maintenance shops that specialized in Rotax engines in the aviation applications. There was one particular "mod" I'm going to explore but there's a disconnect that I couldn't pin down. The circulation of oil in the RV gear circuit.
Is there any circulation occurring @ all in the circuit, be it negligible but movement none the less?

 

[burtshaver2021]

Satisfied with oil injection study so on to the next endeavor.
This concerns the lubrication of the RV gear cavity. Lurked around a few of the Rotax/aviation forums & also called a few maintenance shops that specialized in Rotax engines in the aviation applications. There was one particular "mod" I'm going to explore but there's a disconnect that I couldn't pin down. The circulation of oil in the RV gear circuit.
Is there any circulation occurring @ all in the circuit, be it negligible but movement none the less?

No circulation in the RV

 

[AquaEye]

No circulation in the RV

I'll start there. Knowing this, the "flyboys" workaround is going closed loop, some with a small coolant M/C tank dedicated to RV oil (same injected oil) so as to monitor level. A regimented pm involves gently purging the oil & sent out to be analyzed for metal particulates. Granted this might seem extreme but their 2K feet in the air = Ouch. Dead pilots can't rebuild.
Myself, "leaning" towards closed loop with small vented tank & a more laxed pm regiment. Placement of tank height within hull in relation to oil cavity level will require some thought = ouch..
Here's a couple few of pics of anxiety's belayed. No leaks @ grommet after 16 hrs.
Thanks for the info.

 

[AquaEye]

This is coming out of left field so bear with me.
Does anyone know the oil temp or surface temp of the RV gear cavity area? A thermal map is present, just unknown for my Sea Doo.
I worked with various industrial screw compressors where temps mattered from start to finish & that is an understatement. ( circulated oil with aftercooler, that is)
Syn oil performs best in & around 180/220ish deg & depending on the environment/ambient temps, the "formula or setpoints " can be tweaked.
I have non reversible hi temp strips but I can't answer my own question until this summer & if I want to pull a rabbit out of my hat, the time would be before, not after.
So that being said......