Re: 1948 Evinrude Sportwin 4423 Revisited

[Buccaneer]

Finn Irgens I hate your Evinrude 4423 Sportwin carburator design,
and I hope Ole is giving you an ear full right now about it!
Now that’s off my chest, I did manage to get the infernal thing
running today, after much "fiddling"…….. but something
aint right!
While running in the slow to fast range, If the air shutter adjustment screw if backed off from full seated
it will bog out and die right away. It appears to flood out, as the only way it will restart
is with the fuel needle / knob turned all the way to "off".
One source says the air shutter screw should be 4 turns open initially,
another says 6 turns.
Some times it will be running good at mid speed, but when you transistion to
"Fast", it will bog out and die, and act flooded.
I can get it to idle better if the air shutter is forced further (open?) against the tension
spring.
Am I understanding correct that "the slower the engine speed selected the further
the air shutter is open? So in the photo in the link, showing the shutter covering
the hole completely on the compensation port, would be with the engine running
full out? …….. shutter closed, full venturi action drawing more fuel for high speed?

http://grayhitandmiss.com/Outboards/442 … taway2.jpg

Anyone know the initial turns open for the fuel mixture needle?
Right now I have the knob centered on 3/4 turn open. It was further,
but seem to run better with less.
Thanks for any ideas, Buccanner

Prepare to be boarded!