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Old 10 May 2012, 03:55   #1
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Help with SIB choice if possible?

I have a 6.6 merc 4stroke long shaft.

Not ideal, but it's an aux for the main family boat.

What is the smallest sib that would take it? Or is it just a bad idea?

I don't want a huge one. Just debating buying a sib to throw in with my wife and/or little girl to potter round bays, river, lakes or canal even when the weather is nice.

Second hand ideally, so any common brands would be great.

Airfloor? Wood floor? Etc etc which is appropriate?
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Old 10 May 2012, 05:24   #2
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Quote:
Originally Posted by HUMBER P4VWL
I have a 6.6 merc 4stroke long shaft.

Not ideal, but it's an aux for the main family boat.

What is the smallest sib that would take it? Or is it just a bad idea?

I don't want a huge one. Just debating buying a sib to throw in with my wife and/or little girl to potter round bays, river, lakes or canal even when the weather is nice.

Second hand ideally, so any common brands would be great.

Airfloor? Wood floor? Etc etc which is appropriate?
Check out Dry Run under Ribs and Ribbing lol
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Old 16 May 2012, 10:34   #3
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Hi

The problem you will have is that most sibs require a short shaft motor. The cavitation plate will be too far under water with a long shaft.
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Old 16 May 2012, 14:03   #4
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What about a small rib? Like the Avon 260?

I know it's not ideal but surely it will plod along? Perhaps plane?
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Old 16 May 2012, 15:43   #5
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It will work but Really the only SID that takes a long shaft is a Bombard 420, but as i said it will work and a 9.9 is pretty light so you should be ok down to 3mtr SIB me tinks
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Old 17 May 2012, 13:09   #6
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Do you mean 6.6p or 9.9hp? I am only familiar with a 9.9 from Merc.

The issue is that the cavitation plate has to be positioned within a certain height relative to the bottom of the boat. If not, the boat's handling and steering will be affected, especially at planing speeds.

If you stick to slow speeds you could use any boat, or as suggested, get one of the few SIB's with a transom height that can handle a long shaft.
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Old 17 May 2012, 15:42   #7
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Quote:
Originally Posted by Redrock
Do you mean 6.6p or 9.9hp? I am only familiar with a 9.9 from Merc.

The issue is that the cavitation plate has to be positioned within a certain height relative to the bottom of the boat. If not, the boat's handling and steering will be affected, especially at planing speeds.

If you stick to slow speeds you could use any boat, or as suggested, get one of the few SIB's with a transom height that can handle a long shaft.
6.6 actually. Prob don't even need to plane, but if planing not bothered re handling. It's to chug up small river, poss canal and bays.
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