@B02S4
No sediment in the bowls. Also, when I last cleaned the carbs they were completely torn down and cleaned ultrasonically (~1hr each). All ports and passages were blown out using compressed air (run through a filtered regulator, water trap and desiccant dryer assembly that I use for painting and to protect my air tools). In addition to cleaning the carbs, I pulled the petcock and made sure there was no debris clogging its screen as well as the little hidden filter in the "T" crossover pipe.
After cleaning I polished the fuel bowl needle seats to ensure a good seal and installed new float needles, all other parts/jets as listed and new bowl gaskets.
I received the new larger #150 and #152 main jets yesterday so I'll be removing the shims and installing the 150's and testing in the next couple of days. If the problem is still there, I'll install the #152 mains and test again.
You mentioned before that (with the #45 pilots), my not having to use the choke on startup meant I was probably getting enough fuel (down low)... with larger mains do you think I'll need to drop the pilot jet size back to #42?
Thanks for everyone's help!
Regards,
John
I suggest trying the 152 mains & no shims, with no other changes, first...test on a fully warmed up motor.. take note of throttle position & any symptoms you identify...give us some specifics & we'll get it sorted out.
