Look on the underside of the propshaft bearing holder, the cone shaped part before the propeller. You should see a small plug with a slot for a screwdriver. (I am not referring to the screw that is 90 degrees to the prop shaft that is a thrust bearing locator). Grease goes in there and comes out the larger hole. The larger hole’s also for inspection, meaning you can remove the plug and see if there is grease in the gearcase. Normally the design is such that grease goes in from a lower position so gravity allows it to gather and push out thereby filling the void rather than the reverse which would be run out and creating a void.
George
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