Reply
 
Thread Tools Search this Thread
 
Old 03 March 2014, 15:36   #1
Member
 
Country: UK - Wales
Town: abergele
Boat name: all mine
Make: ribtec 3m
Length: 3m +
Engine: tohatsu 9.8 hp 2st
Join Date: Sep 2012
Posts: 275
what sort of speed

Hi all I have got myself a 9.8hp 2st tohatsu, I will be useing this on a 3.2m sunsport sib and was woundering what sort of speed will I get with two bloke's around the 170kg mark (combined weight) and 22lt fule tank and light fishing tackle
Thanks
__________________

__________________
slate1234 is offline   Reply With Quote
Old 03 March 2014, 15:50   #2
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,926
RIBase
6kts or 16kts - depending if it planes or not
__________________

__________________
"Who knows what evil lurks in the hearts of men?"
.
willk is offline   Reply With Quote
Old 03 March 2014, 15:55   #3
Member
 
Country: UK - Wales
Town: abergele
Boat name: all mine
Make: ribtec 3m
Length: 3m +
Engine: tohatsu 9.8 hp 2st
Join Date: Sep 2012
Posts: 275
Maybe I should of asked will it get on the plane then
__________________
slate1234 is offline   Reply With Quote
Old 03 March 2014, 15:56   #4
AJ.
RIBnet supporter
 
AJ.'s Avatar
 
Country: UK - England
Town: Warwickshire
Boat name: Impulse
Make: Ribcraft
Length: 5m +
Engine: Suzuki 140
Join Date: Sep 2011
Posts: 1,020
I've got the 2.9 sun sport. Think I got 17 knts out of mine. Tad slower with two and if it's anything like mine passenger will have to lean over the bow to get it over the hump.

PeterM will remember the speed but he is no longer reading Ribnet apparently! LOL
__________________
AJ. is offline   Reply With Quote
Old 03 March 2014, 15:57   #5
AJ.
RIBnet supporter
 
AJ.'s Avatar
 
Country: UK - England
Town: Warwickshire
Boat name: Impulse
Make: Ribcraft
Length: 5m +
Engine: Suzuki 140
Join Date: Sep 2011
Posts: 1,020
Quote:
Originally Posted by slate1234 View Post
Maybe I should of asked will it get on the plane then
Yours should be easier than mine as its longer
__________________
AJ. is offline   Reply With Quote
Old 03 March 2014, 16:29   #6
Member
 
Country: UK - Wales
Town: abergele
Boat name: all mine
Make: ribtec 3m
Length: 3m +
Engine: tohatsu 9.8 hp 2st
Join Date: Sep 2012
Posts: 275
Thanks AJ, I have waited to get the right engine for a while and hope I haven't made a mistake
__________________
slate1234 is offline   Reply With Quote
Old 03 March 2014, 16:31   #7
AJ.
RIBnet supporter
 
AJ.'s Avatar
 
Country: UK - England
Town: Warwickshire
Boat name: Impulse
Make: Ribcraft
Length: 5m +
Engine: Suzuki 140
Join Date: Sep 2011
Posts: 1,020
Quote:
Originally Posted by slate1234 View Post
Thanks AJ, I have waited to get the right engine for a while and hope I haven't made a mistake
We'll sort after engine worth the wait
__________________
AJ. is offline   Reply With Quote
Old 03 March 2014, 19:55   #8
Member
 
Locozodiac's Avatar
 
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
Slate,

Move your boating mate further bow, hope not as a bow mask. inflate sib and keel to at least 3.0 psi with gauge, trim engine to be perpendicular to water level, once engine is warm give it a full wot, see if planes, fingers crossed. If not, probably will need to install trim tabs to make that combo plane faster with a less HP engine than rated for.

A less HP engine will plane faster a larger sib/rib, more surface to slide better + less hull drag to overcome fast.

Happy Boating
__________________
Locozodiac is offline   Reply With Quote
Old 04 March 2014, 12:21   #9
Member
 
Country: UK - Wales
Town: abergele
Boat name: all mine
Make: ribtec 3m
Length: 3m +
Engine: tohatsu 9.8 hp 2st
Join Date: Sep 2012
Posts: 275
Thank's for the reply's I am picking up the engine next week so fingers crossed all will be ok
__________________
slate1234 is offline   Reply With Quote
Old 07 March 2014, 10:33   #10
Member
 
Country: USA
Town: Pooler, Georgia
Boat name: not applicable
Make: Avon
Length: 3m +
Engine: Outboard
Join Date: Aug 2011
Posts: 156
We run an Avon 3.1 Rover plywood floor with a Nissan 9.8, and it performs very well with two people. We ran with a 15 HP in the past which was unpleasant at full speed.

I cannot imagine not planing with a 3.2 unless it is a much heavier boat.

Incidentally, the boat is rated for up to 10 HP.
__________________

__________________
frankc is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 05:31.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.