On Thu, 02 Jun 2016 00:03:37 -0500, Califbill
wrote:

wrote:
On Wed, 01 Jun 2016 17:44:53 -0500, Califbill
wrote:


I would pull the idle jets and make sure they are clean and no detritus in
them. Depending on the carb, if the needles are a little sticky.

Way back in the olden days the trick was to run the idle jets in all
the way, back out them out several turns (one at a time) then rev up
the motor and cover the carb throat. The momentary high vacuum would
suck the crap out most of the time. Of course if the passages are
plugged, that may not work.


My T-8 Yamaha, has such small jets that the smallest piece of junk van
screw up the low speed jet.

I imagine that 3.0 uses a very simple automotive type carb. Until
pretty recently boats used carbs similar to what you would see in a 67
Chevy because there was no real emission control.