This throttle-kill problem is still not solved....
First, an update.
Fall 2015: I took the boat back to the the mechanic that swapped the engine from the 120 to the 140.
He found that the ball bearing that my lake mechanic had put in (in July 2015) was the larger size ball bearing from the carb kit and it was jammed in the fuel channel between the accelerator pump and the fuel bowl - and would not come out!
So, he got a different used carb and put it on the engine. He test started it and then winterized the boat.
He didn't test it to see if the acceleration problem was still there. I WISH HE WOULD HAVE TESTED IT MORE!
He told me to give him a report in the spring (2016) when I started it for the first time of the season.
So, I towed the boat back to the lake and parked it in the garage for the winter.
Spring 2016: May 15, I rolled the boat out and gave it a test with water muffs in the driveway.
It started much easier this time, but the engine still kills if you increase the throttle quickly.
I was alone when I test started the boat, so I did not get a look at how much gas was getting squirted down the carb throat, when the throttle lever was pumped. Since it started much easier than last year at this time, I would guess that some gas is getting squirted by the accelerator pump, now.
The I shot a video to demonstrate continued throttle-kill for the mechanic.
https://www.youtube.com/watch?v=_MF2sJg_wqUI sent him the link to the video and 2 weeks later he finally responded (through Dan Luke) that he doesn't know what else to do about it, and advised buying a new remanufactured carburetor.
I personally don't think he did enough diagnostic testing to determine that the carb is definitely the problem, and he doesn't seem willing to do more work on it.
On Sunday, I noted that the best setting for the idle set screws was for the rear screw to be 100% seated and the front screw to be 1/2 turn opened.
I'm not sure if that indicates anything?
So, is this definitely a carb problem? Or could it be related to the carb linkage levers or the Petronix electronic ignition?
Should I send this current carb to The Carburetor Shop in Maplewood to be reworked, or buy a new remanufactured carb from somewhere?
Eric