Scott Atwater lower unit

[Gbrad]

Is there supposed to be lower unit oil in the 1950's SA 5 and 10hp motors? There was no oil in any of the three motors I bought.

These motors smoke like crazy is that normal. I'm just going with 50-1 mixture.

 

[flyingscott]

24-1 is the correct mix for those motors. What are the serial #s need the years? Those lower units will leak the gear lube out.

 

[Grub54891]

When I had mine, every trip out required new lower unit oil, Drained and replaced every time I got home, and checked before going out. I just figured the seals were bad, but she ran fine. I gave it to another youngster who needed a motor.

 

[RCO]

The earlier 50's motors used lubriplate grease in the lower units.

 

[Gbrad]

The 5hp is a 1955 and the 10HP is a 1956. I changed my oil mixture to 25-1 and its much better. Still smokes but not near as much thanks.

It looks like I have 2 regular screw head bolts on the lower unit one says "Grease" and the other says "Vent". Safe to assume I put the gear oil in the grease hole?

Lastly, I lost one of the water pump impeller lock pins. Has anyone ever made one out of say a small nail or wire hanger?

 

[Grub54891]

For the lock pin, it would be best to find a stainless nail or something like that. Regular steel will rust and possibly fail, or get rusted and stuck.

 

[flyingscott]

80w90 gear lube for the lower unit and make the new pin out of Stainless steel like grub said.