Right now i have a 200hp Yami, 1989. I am trying to find the weight of that engine, which i cant find anywhere! i have not noticed it sitting low on the water, but i feel the stern sink low some times when running it before planing.
I concluded that the 225hp is out of the question, i'll be in the market for a 200hp that weights less than 400lb, or 400 exactly.

You guys are great help!!!!

225 Vmax is over kill and really too much weight. Better suited to a 23'. Even half of that power is sufficient to satisfy a 20 in most cases. Case in point, I think it was bitsamonkey that recently re-powered his 18 with a Suzuki 90 and showed 6.9mpg at 27mph cruise, topping out at 37mph. I have a healthy 115 tower of power on my Seafari 20 and have yet to actually "need" more power.

Your '89 is listed at 390 lbs. You wont find a modern 200 anywhere near that light. Maybe 490. 1990's Merc 200s were only a bit over 400 lbs.

Some of the 175s like the etec may be close at maybe 435 lb but still out perform your older Yammie.

Good luck.

Is there anywhere where I can find the year, horse power, and weight of motors? Is there like a chart? I've looked everywhere onlinr and I dont find anything.

oops! here it is... NADA helps! =) year, make, model, HP, and weight!!!!

http://www.nadaguides.com/Boats/1997...utboard-Motors

Well i am the second owner of a 150hp Mercury 1997, thats in very conditions, very clean and with great compression!