Hi Boyd
A shame that we did not have a chance to meet on Friday so that we could try one of my carbs before you went away.
I do consider that you still have a carb and ignition issue since last time that you came over to see me with the motor. That visit was to sort out a blocked OEM filter in the tank remember? Well not blocked but stuffed right royally and needed removal. I believe that has been done.
I did mention that the carb needed cleaning out properly at that time. I suggested using the full carb kit that you have including the low speed/ idle gallery plug. I mentioned that I have new shot as well. Sometimes you have to make sure before anything can be deemed as "Cleaned".
Originally, when you purchased this motor Boyd it had a fuel pump on the case. It was incorrect so I suggested it be removed at that time. It was flooding the carb!
Question is………………is there any chance that there is an induction leak remaining?
In other words…………….is the pulse port sealed up correctly? Please note that if any issue the bottom cylinder will give problems.
You mentioned just now that the "High Speed" circuit is the problem?
This circuit only really comes into operation when the motor is under load…………not really in a bucket of water in the back yard.
EDIT: Have you actually had the fixed high speed jet in your hand? No other way to check if it is either damaged or clean!
May Just play the Devil’s advocate in asking how the carb/ignition advance point has been set for just on or off the idle circuit.
As asked earlier……………you may have replaced some of the ignition gear…………BUT……….what is the air gap?
Condensers check out OK?
Leave your motor with me for a week as suggested Boyd.
Just my thoughts and thanks to everyone helping Boyd so far over the internet. Anything I have missed?
Send pics of your Seagull on a transom when you can.
Regards
B