Originally Posted by
crappiepappy
... and for what little I know about it :
I'd .... get rid of all the old gas, then dry & vacuum the tank out, & replace with new gas/oil --- install new water pump impeller --- decarb the engine with Deep Creep or Sea Foam --- then replace the spark plugs.
It sounds like you have some varnish buildup (old gas film). You might also want to consider changing the fuel filter (if you have one). I'd also remove & check the fuel bowl, just to see if any sediments/gunk is present (esp if you don't have a fuel filter installed). Look for tiny chunks of rubber or rust. Replace the fuel line/bulb if it's cracked or showing signs of old age (stiff, flaky rubber, hard bulb, etc).
You might even consider putting some Marine Sta-bil in your gas tank ... especially if you don't use the motor for a couple of months in a row.
But, take these ideas with a grain of salt ... cause I ain't no expert on outboards ;) It's just what I'd do.
... luck2ya ... cp :cool: