imho…..if any air sucked back in is not a concern since the volume of air would be minimal % compared to the air sucked to operate the carb venturi effect.
leaving 1/16 implies some friction holding the slinger in place just above the surface. The rotaton imparts the sling effect to spin off any oil to be recirculated .
(*) I reread the book and did not see an actual route to channel any of the escaped oil under the slinger . Presumably it goes back in with crankcase vacum on the upstroke the same way it would have escaped under crankcase pressure on the down stroke.
I any event fixed or not it would surely rotate anyway just like any automatic transmission rotates the inner parts with the simple friction between oily surfaces.
Hopefully F.R. can educate us on this very specific topic 🙂
The design seems to have worked all these years so why worry ? I certainly would not try to modify it with grease or epoxy
with all you have done to clear any possible blockage (*) are you experiencing any further issues ?
btw I remember working on an oldy and the slinger was loosy goosy on top…I eventually sold that engine but never had any comebacks about it . All the oldies I have resold were “money back warranty sales” so if anyone had issues they never came back
. I sell them all $150 after a basic refurbish (coils. points , timing , carb clean condensers impeller GC oil… & most were converted to pump ) just to recoup my costs and keep me busy in the basement during winter.
Joining AOMCI has priviledges 🙂
