Re: 9.8HP Tohatsu 2-stroke odd behaviour
I've had a couple of 9.8 Tohatsu/Nissan 2 strokes and they've generally been the most reliable outboards ever. They can have a problem with old ethanol fuel like a lot of outboards but what you are describing sounds more like a bit of water in the fuel. Try draining the float bowl and fresh fuel. If that doesn't solve the problem take the carb off and disassemble (extremely easy). Soak the parts in carb cleaner and blow out everything with compressed air. That and a new plug has always solved every problem I've ever had with them.
SV Laurie Anne
1988 Brewer 40 Pilothouse