Welcome to Ribnet.
I guess you are asking one of two possible questions,
1) thoughts on a 1.2Hp outboard, and your Q has been posted in the wrong section.
2) thoughts on some 1Kw transmitting device. (radar, radio)
if 1), I have a 2Hp (approx 1.5Kw) auxiliary on a 5m (approx half ton) due to a lack of space between the A- frame & the main engine. Suffice to say I'm looking for something a bit bigger! If you just want to pootle about slowly, 1Kw will be fine in calm conditions.
if 2), I reckon it's the quickest way to fry your brains! So make sure it's on a high enough pole / frame to clear your head when standing. Also 1Kw @12V is a lot of current. Make sure your battery / alternator can cope!