quote aquasonic:
I believe the small access hole in the driveshaft tube is the driveshaft tube vent, not a grease/oil fill. If I recall correctly, it looks like a brass hex nut with a hole in the middle on the outside of the motor on the Port side of the mid section. I own a couple of the HD-25’s, and they take 90WT. I’m not 100% sure about the HD-20, but if it doesn’t leak with the 90WT, then your probably OK.
I believe the small access hole in the driveshaft tube is the driveshaft tube vent, not a grease/oil fill. If I recall correctly, it looks like a brass hex nut with a hole in the middle on the outside of the motor on the Port side of the mid section. I own a couple of the HD-25’s, and they take 90WT. I’m not 100% sure about the HD-20, but if it doesn’t leak with the 90WT, then your probably OK.
Is this what you are referring to? I have a similar 1940 HA-15 with the same setup. I haven’t been able to get a clear answer on what the purpose of the nut with a hole in it is for?
The 2 small holes are the coolant water spray holes.
