Flooded carbs with oil

[guy48065]

I had a heck of a time starting my 40HP Johnson this weekend after winter storage. Since I have oil injection I can't just disconnect the fuel line & run it dry so I fogged the motor through the port on the primer, then unhooked the fuel line & stored the tank in the garage. Left the oil line attached since it doesn't have a quick-disconnect.
Oil running down the outside of the outboard was my clue the carbs had overflowed during the winter. I'm not sure how that happened but what am I doing wrong in my winterizing routine?

[Bamaman]

The biggest pain for carbs. is when the needle valves get gummy--and one will start the drip, drip, drip. That's when the engine runs and starts rough.

Why don't you just go ahead and drop the carbs--disassemble and clean them. It's a very easy thing to do on that motor and you don't even have to buy any gaskets or carb. kit if you're careful in disassemble. Your only cost would be an aerosol can of carb. cleaner.

You just have to note how many "turns" there are on any adjusting screws so you can put'em back at the same place after reassembly.

Last time I cleaned the 2 carbs on my 115 hp Yamaha 2 stroke, I had the boat back running in about 1 hour. And I was very careful to use a very clean table to disassemble the carbs one at a time. I also have a repair manual to fall back on if needed.

I got 28 good years out of my Yamaha before blowing the lower unit. And I never fogged my motor or really did any "winterization." All I ever did was change spark plugs, fuel filters and every few years replaced the rubber membrane on the gas filter (2 minute job.)

[guy48065]

So my routine is fine but the carbs leak?

Didn't look like an hour job to me. To get the carbs out first the airbox comes off--but before that can be removed the oil pump mounted to it has to go. THEN it looked like the lower shroud would need to be removed just to get at the lower carb.

Shortcuts?

[slingshot]

Will the motor start and run??

[guy48065]

Yes it's running now.

The top carb bowl drain could be accessed by unbolting the airbox & reaching through a hole.
The bottom carb can't be accessed with the lower shroud in place so I left it alone.
when I got it to fire it ran like crap on 1 cylinder until the oil in the bottom carb bowl was used up. Then it took off & ran normally.

This doesn't sound normal.

[Bamaman]

If it's running better now, let the engine run for awhile and then cut it off.

Then look into the carb. throats and see if there's any drip, drip, drip that indicates the needle valves are sticking. That's what I usually run into with modern day 90/10 gasoline deteriorating anything rubber.

[guy48065]

A question:
Seems like the primer bulb can put more fuel pressure on the floats than an outboard fuel pump so isn't this a better way to check whether they seat than running the motor?

Do others with oil-injected motors disconnect the oil line for winter storage?