Starter Generator Oil
 

I just realized recently that my 149 has the older style starter generator with an oil cap on it. What grade of oil does it take?

Any oil is better than no oil but I like 3-4 drops of 3 in 1 light machine oil.

i don't have any of that unfortunately. How about plain SAE30 like what's used in the engine?

If I recall the ones with the oiler have a bronze or sintered brass bushing instead of a roller bearing. As stated earlier any oil is better than no oil. I think it was originally serviceable.

Sometimes as I have BTDT If the bearing on the pulley side has been updated to a sealed bearing the felt has been removed, so putting oil in it will just make a mess inside. I have only seen a bushing in the communicator end.

Bottom of page 3, "8-10 drops of light engine oil every 100 hours"

https://www.onlycubcadets.net/pdf/S_G.pdf

Back in the 70's I remember rebuilding a starter that had a badly worn commutator and a lot of sticky black powder type crud inside it. It didn't have that many miles on it. The well-intentioned idiot owner (me) liked to lube things a lot, believing that more was better. Apparently, too much oil is a bad thing. It migrates between the brushes and the commutator, then the brush arcs turn the oil into carbon powder and that acts as an abrasive.