I don't have a cooler. It's a brand new gear, pretty sure nothing is getting in to the oil.
Kettlewell, the question as to why they keep failing is a whole other kettle of fish
. I've checked and re-checked everything without finding conclusive answers. I just re-pitched my prop (I was around 100rpm off max engine rpm) most people didn't seem to think that amount of rpm
should be an issue, but I am deliberately under-propping now in the hope that it might help.
I communicated with another user on here who went through 5 ZF gears before giving up and switching to another make. His conclusion after trying everything under the sun was that they rate the gears a little too closely, i.e. if the specs say you need a ZF10 then you should probably go with a ZF12 or ZF15.
Frustratingly, I haven't gotten a conclusive answer to my problems after coming back to Ft Lauderdale from the Bahamas
to get it sorted out. I brought my last failed gear to ZF to look at, they said that the detent had been modified (last gear was a reconditioned Hurth
HBW100) such that the gear wasn't being fully/properly engaged even if the shifter was adjusted properly. That may be so, but it doesn't explain why my first one (a brand new ZF10) failed, or if I'm having trouble with this new one already it definitely is not the shifting adjustment that's the problem.
If I lose another one I think I might join the Pardey's and throw the stupid engine overboard
I don't want to jump to conclusions, I'm really hoping that the condition of this oil isn't a problem. I may bring the oil out to ZF and see what they say.