Originally Posted by mraible
Also, y'all seem to suggest a long shaft for a raft. I'm looking to pull the trigger on the ordering tomorrow, so please let me know if a short shaft is better.
Here are the motors I've owned:
3.5hp Tohatsu 2 stroke
8hp Honda w/alternator and electric start
6hp Tohatsu Sail Pro w/alternator
20hp Tohatsu w/alternator and electric start
18hp Yanmar diesel
If your primary use will be for flat water, my personal favorite is the 2hp Honda. I've used it to push a 16' cat with a 16' SB raft from Flaming Gorge to Lake Powell, used it on the GC, tail end of the San Juan, etc. Here are some of the benefits:
Plastic prop will last for years (you WILL hit a lot of rocks)
1 litre internal tank is good for about 105 minutes
air cooled so no worries about churning up river silt (San Juan)
29 lbs. which over time you will greatly appreciate.
Don't even consider a short shaft. Rafts and cats are considered to be displacement hulls and will only go so fast no matter how much hp you provide meaning 6hp will be only slightly faster than 2hp. However the larger displacement and prop will allow you to push more boats.
Happy motoring. You're going to turn into a lazy boater.