Randall:
Thanks for the note. John Twist from University Motors and YouTube fame also
recommended using a heavier oil for better acceleration. He liked using tranny
gear oil.
Jim Henningsen
Sent from my iPhone
> On Nov 5, 2018, at 11:20 AM, Randall <TR3driver@ca.rr.com> wrote:
>
>
>> What kind of oil are you using in the dash pots? If the oil
>> is too heavy, it may overdamp the pistons, causing them to
>> rise too slowly and momentarily weaken the mixture, causing
>> the hesitation. I find 3 in 1 is about the right weight.
>
> Actually, it's just the opposite. Heavier oil makes the mixture go richer
> right after you open the throttle. Using oil that is too light can cause a
> "lean bog" (like Jim described).
>
> The book actually recommends 30 weight for temps between 40F and 70F; 40
> weight above that. Optimum for you may vary somewhat, depending on engine
> condition and so forth; but I have always found that performance suffers
> with less then 20 weight
>
>> The choke cable is hard to pull
>> out. Takes two ands
>>> to pull out and then twist to lock. That's to really get the choke
>>> levers to move both jets down. Is this normal or maybe I
>> need a new choke cable.
>
> Not normal, but unfortunately rather common. Did you polish the jets when
> you had the carbs apart? Originals were supplied polished, but the
> replacements I've seen have been dull. Dull means a rough finish, which
> greatly increases the friction against the glands.
>
> The linkage also goes together in an odd way. If you put it together the
> way it seems it should go, it's harder to operate the choke. The two
> clevises hang out behind the levers, rather than straddlings them.
>
> I like to replace the gland sping (inside the jet housing) and the return
> springs during a rebuild, especially if you don't know the full history of
> them. It's not uncommon for people to stretch the gland spring out a bit,
> in an attempt to get the glands to quit leaking. The extra pressure
> increases friction, to the extent that often the jets won't return after
> using the choke. So then they shorten the return spring. Both actions make
> the choke more difficult to operate!
>
> -- Randall
> <FIG 28 CARBURETTORS (LINKAGE) reduced.jpg>
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