ok then.... next question. I know there is some adjustability due to the mixture screws... but the actual jetting isn't changeable within the carb. While trying a carb from a K91 on my 301s would be stupid/crazy, I have a pair of the M 12 version of the 12 HP) with "30" carbs and seem to run just fine without seeming to be too rich. . Levi says in the post above this one he has a #26 on a 321....smaller carb than me, on a bigger engine. Mine being electronic ignition with no timing adjustment, and his being a point ignition with timing variable based on point gap /and wear-condition/ making a difefrence in carb requirements?
Are the main jets and such the same, on "all" carbs of a given size no matter the HP rating of the engine it is put onto?
meaning (in my case) my #30s are jetted the same as ones that would come on a K341 (16HP)?
I do understand that application itself dictates not only mixture settings but jetting too.
so on a constant, high load application they put a carb with a different size venturi in order to (also) increase jetted size?
why else would we have kohler putting larger carbs on some engines of the same HP than others?
I wonder with all else being equal ,if there is much of an actual HP difference between engines of the same displacement but a different sized carb? same exhaust, same load, same overall condition, etc?
Briggs in particular seems to be able to greatly vary the HP of a model line just by applying a different carb especially on the older L heads.. 10 HP 11 HP 12 HP 12.5 HP all being the same displacement but different power ratings.... though stickers are cheap to print and stick onto engines off the same assembly line...