1958 7.5 ad-12 carb settings

[bonitoman]

How many turns out should I be with the top carb adj. and bottom carb adj. Thanks

 

[jbjennings]

Re: 1958 7.5 ad-12 carb settings

About 1 turn out from lightly seated for the high speed and 1 1/4 turn out for the low speed. there's a really helpful set of instructions on carb. adjutments in the FAQ section by Joe Reeves. I've referred to them a million times and always found them helpful.
JBJ

 

[bonitoman]

Re: 1958 7.5 ad-12 carb settings

Is the top one low speed?

 

[samo_ott]

Re: 1958 7.5 ad-12 carb settings

Yes, the low speed is always on the top and the high speed is always on the bottom for all older engines... (dunno about the newer ones)

 

[jbjennings]

Re: 1958 7.5 ad-12 carb settings

I thought it worth mentioning that these are only initial adjustments and have to be fine-tuned with the motor running. The high speed can only be adjusted perfectly with the motor running full throttle on the boat. I usually have good luck setting the low speed with the motor running in a barrel. Most of mine wind up about 1 turn on the low and 3/4 turn out from lightly seated on the high, but they're all a little different. Sorry, I forgot to specify which was which!:redface:
Good luck,
That's a nice motor.
JBJ