[Bob Carriere]

Far from being an expert...... they can be a challenge.

Bottom line only 3 things keeps it running or farting..... Air fuel and spark.... I assume it gets a lot of free air..... then fuel...

could be vapour lock.... a collapsing inner wall of an old rubber fuel line....etc....... I would try to make sure you do have adequate fuel...... set up a gravity feed directly into the carb..... shortest line possible....... it may be a fuel shortage...... have you checked the fuel glass bowl for floating debri...

or...

even if newly replaced..... a new coil could be defective......or an overheating coil...... or condenser affected by heat could cut out....... maybe worth a try to replace with a known good unit....

Pardon the expression but when farting is it a loud crack of too lean a mix or a greasy fart with black smoke......from too rich a fuel diet...?

Any idea of real engine temp...... or vacuum reading...?

What engine have you got.... 216 or a later 235..?

Any spare carb you can swap for a test...?

Keep us posted.....

Curious Bob