OK, I do remember having a "D" with this type of top but it did have the small spring rivited thru the top. An Early Elto parts book does list a complete carb change at SN 20,000 and a part change at SN 20200 and the description of parts match up so this must be it . But no mention of the ball bearing."C" &"D" SN’s run from 12000-30000. Jim Ross.
After this discussion, I’ve decided to remove the metal ball since it apparently doesn’t belong in there. Also, if the cover is removed while on the motor, the ball will drop out – ending up inside the carb and then inside the powerhead. Thanks all.
This discussion answers a few of the questions I had. One question still outstanding is in regard to the lever on top of the early model C carb. Is there a procedure for the initial setting of the lever and where it should bottom out? I started to dismantle mine before I realized how it worked. Now I don’t know where the initial setting should be.
When you have nothing to go by your best
bet is to start in the middle. My experience
with poppet valve motors that when the poppet
valve is opening too much they seem to run
rich but leaning out the fuel mix doesn’t help.
When the valve isn’t opening enough the
motor won’t rev up. As it appears the adjuster
was eliminated on later motors that might
suggest that there isn’t enough adjustment
to make a noticeable difference. Those who
have actually run these may share their
experience.
A "Boathouse Repair" is one that done without having tools or the skills to do it properly.
I have been unable to find an "official" setting, but did find this in a 1950s service manual. The Elto Ligtwin was 5.4 horse power opposed twin. I would think the Lightwin setting would be close. . . 😕