475lbs
683 lbs.
225 to 315 depend on model
change your thermostat
The dry weight for a 1996 model, 225 hp Yamaha outboard is listed at 494 lbs for all models except a 225TLRU, which is listed at 417 lbs.
The 1997 model Mercury, 225 hp EFI uses a NGK BR8HS plug, gapped to .035 in.
455 lbs
The dry weight of a 1996 model, 225 hp Evinrude Ocean Pro is 455 lbs.
around 600 pounds
40 lb. ft. w/#271 loctite
.40
I found this spec sheet from Yamaha. http://www.yamaha-motor.com/outboard/products/subcatspecs/2/specs.aspx The specs are probably for the 2008 models, but you can probably assume the 2006 weight is between 225 and 250 lb.
The Statue of Liberty would weigh about 90 tons on Mercury, since weight on Mercury is approximately 38% of weight on Earth.