I have 50 horse Honda it has not and will not run for 6 months now. I believe problem is with carbs.
However I can not dismantle and clean jets because some one else stripped out
slot in head of brass plugs to access jets. I am trying to find ways get it going.
I currently managed to get it running on one cyclinder but that is all. It also
does strange things--- like you have to open the carb drain screw to get it to run, close the drain screw it shuts off. This may be a long drawn out process of elimination. However I have to get engine fixed people depend on it. Where do I start---.

Probably will have to get the jets out and clean carbs to get it to run properly. Might have to replace carbs if unable to them out.

__________________
Regards
Boats.net
Honda Outboard Parts

As noted I can not get to the jets. I even cut down into the brass plugs to
deepen the screw slots. Even with a propane torch, square shaft screw driver and vice grips as well they will not budge.

I do not have ultrasonic cleaner either.

I tried multiple soaks in solvent and carb cleaner then compressed air. Stll no joy. Finally I resorted to air conditioner clearner. The was injected
into every port and hole with a syringe. Also carbs were positioned on cups an the cups fill sufficiently to cove brass plug and jets. Then heavy flushing with water and then compressed air. This worked on carbs 2 and 3. Number 1 had yet more troubles The solenoid sump and feed pipe on the bowl bottom was totally blocked with white alumnium oxide powder. I had to drill out the brass ball and then the actual tube on a drill press. The hole was re-sealed with a small metat screw and JB weld. These may no be approved methods and yes the acid does etch the coating on the carb. However the engine is runnking---