Reply To: Freezing lower unit

[Don]

bob-d wrote:

Don, I didn’t get the replacement case from Bill W. yet.
When it arrives, I will definitely update the post, and shoot a few pictures to let you know if it has holes.
I really doubt it, as Frank said previously that he saw this freeze damage before on northern motors that were brought down south, so I guess it’s not an isolated case.
OMC only made the 28HP from 62-64 with the proprietary gear case part number.
Possibly with the evolution to the 33HP gearcase in 65 (different part number) they changed the case to eliminate non draining casting cavities?
Wondering if there was ever a service bulletin possibly to provide a few relief holes?
So many questions??
Thanks,
Bob D

I wonder why the gear hsg would be unique to the 28hp??  Seems like the same gear housing would be used from mid 50s up on this style engine.  Certainly the 28 and 33hp models would use the same hsg…  Who knows, those part numbers are strange also.