1996 200 Johnson

I need some help to get my Johnson running right again.
Last weekend, the engine started fine and idled good for 10 minutes to get out of the boat cove. I then accelerated normally and drove for about 15 minutes at moderate speed.

The problems began after I had stopped the boat for a few minutes. The engine would start and idle fine, but when I put it in gear and try to accelerate, it died over and over again. I tried hitting the choke button, but it did not help.

When I finally made it back to the ramp, I checked the plugs and one plug was pretty oily, but the others looked good with light tan insulators. While on the water, the water pressure was good and the pee hole showed good water flow.

Now for my confession.....I do not have stabil in the tank and I had not run the motor for about 9 months. Does it sound like the carbs are gunked up? If you think that may be the problem, is there a fix short of taking them all off and going through all of the carbs??

Your help is appreciated!!

Jay