horsepower advice needed

If you are going to keep the engine on the back of the rib then a 15 would be good. If you have to take it off, a lighter engine would be better.
The Tohatsu 9.8 is very powerful for its weight. I am not sure that an 8 would be enough for a 3.1 rib they are fine for 2 up in a sib.

Once you have an engine, get a service manual. The ones that cover a range of models are ok for basic servicing but I find lack the details if you really need to get serious.

2 strokes are probably best for a small rib my Avon supersport squats with a heavy 4 on the back (25Hp), but balances nicely with a 2.
Many of the new ribs coming out now have extended tubes further past the transom to support heavy 4 strokes.



He never did care for the river, did Montmorency.
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Hi Victor

Try this site <a style='text-decoration: underline;' href="http://www.bosunsmate.co.uk/" target="_blank">http://www.bosunsmate.co.uk/</a> which is biased towards Ribs and
engines

Hope it helps

Dave




"Victor" <viktor.DeleteThis@ukf.net> wrote in message
news:40aba59a$0$17773$cc9e4d1f@news.dial.pipex.com...
 > Hi all,
 > I got a second hand zodiac 3.10 m rib.
 > I am going to get a second hand engine but don't know if I should go for a
8
 > , 9.9 or the max allowed size of 15 HP.
 > I decided to go for a 2 stroke as I wil only use the boat for the summer
 > months and need it to be as simple as possible.
 > Are there any good sites that explain the basics of engine maintenance and
 > setup. I will use the engine in salt water.
 > Thanks for any advice
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: horsepower advice needed