- This topic has 7 replies, 5 voices, and was last updated 1 year, 7 months ago by
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As far as I can tell, it’s correct. Bottom line is, with spark advance at slow or retard, the carb butterfly is closed no matter what twist grip setting. With spark advance at WOT, the carb butterfly is free to be moved by the twist grip.
While cruising along at WOT and twist grip on Fast, it should sing along. Leave the spark advance at WOT and twist he grp to Slow and the carb will close, causing it to slow down, albeit rough running. Twist to Fast and away you go again.
But for smooth idle/slow running, the carb must be closed and spark retarded, all done automatically by sliding the s/a lever to Slow.
PS, think race motors with dead-man’s throttle
While the carb and magneto are synchronized
on this Martin the button at the end of the
tiller gives you control of the carburetor
butterfly much the same as the twist grip on
your motor.
Tubs.
I’ve given my 75 to my son-in-law and he uses
it to fish. Its been getting regular use for the last
4 years. I still do the maintenance. I’m about out
of the 40 weight oil you sent me. last year I put
the gear oil back in as it looked fine. I think this
year I’m trying something off the shelf. Haven’t
made up my mind as to what yet. Should know
by the end of next summer how well that worked.
I never had any interest in these and only have it
because it was part a lot. Its a great motor. Now
I have my eyes out for a 100 Twist Shift (10 hp.)
Tubs.
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