59 lbs for the Tohatsu 9.8 HP 2 cycle is a lot less than 81lb (without engine oil) for the 4 cycle version is still a significant weight difference. The Yamaha is even heavier.
A lot of cruisers are buying
up the available 2 cycles because many models are just not available in the 6 to 9.9 HP range and will not be available next year at all.
I keep reading comments that 4 cycle outboards are more reliable than are the 2 cycles yet can anyone actually provide a factual source for such a claim? Some marketers have made such claims at a time when they could garner greater profits selling 4 cycles over the existing 2 cycles and, therefore, their claims are at least suspect.
Two cycle engines have fewer moving parts
than 4 cycle engines. Engines with fewer moving parts have better failure rates. In addition, an outboard oil
tank has a greater chance for getting salt water
inside than inboard engines do (for whatever reason).
All things being equal one would prefer to opt for a 4 cycle engine yet weight, cost, maintanence, and reliability
are non-equal factors to consider.