Thank you. Originally this motor would not take fuel well. If I had to idle through a no wake zone then load the boat on a trailer the motor would die when trying to accelerate. Because of this I cleaned the carburetors, rebuilt the primer solenoid and changed the fuel lines. These changes did help some but I still had a problem with the motor dying when trying to accelerate from an idle. I then removed the Reed valves and replaced them. Now the motor is not idling well but seems to take fuel much better after taking off. It is idling too low. You have to advance the throttle (open the butterfly) to keep the motor running. Once the motor takes off it runs well.
I though it would be smart to check the idle timing. After syn the carbs per the manual and then aligning the throttle cam with the cam follower I decided the check the idle timing. I placed the cable on the number one cylinder(top) Set the light to 2 stroke and then advanced the cam follower until it just touched the the line on the throttle cam. I then tried to read the timing but it seemed to be all over the place.
Before this, I found tdc on the fly wheel. I didn't have a piston stop so I just took the spark plugs and turned it upside-down in the number one cylinder then rotated the flywheel clockwise slowly until the piston came into contact with the plug. I remove the plug and the repeated the same process on the other side of tdc. I measured the distance between the marks and went halfway between them. The flywheel was marked tdc.
I have also checked cylinder pressure. All good.
I replaced all coils(84 year motor) and replaced the cdi at some point because it went bad.
Anyone have any ideas.
