Reply
 
Thread Tools Search this Thread
 
Old 12 May 2009, 18:15   #11
Member
 
Country: UK - N Ireland
Length: 6m +
Join Date: May 2009
Posts: 12
thanks guys, i will check all tomorrow
__________________

__________________
johnboym3 is offline   Reply With Quote
Old 12 May 2009, 18:28   #12
Member
 
Country: UK - England
Town: Near Godalming
Boat name: AJA
Make: Ribeye
Length: 6m +
Engine: Yamaha F150AETX
Join Date: May 2009
Posts: 558
Quote:
Originally Posted by DizzyLizzy View Post
Hi Neilda. I've a 2004 Yamaha F150AET on the back of my Ballistic 6.5 and I get a top speed of about 39 knots (Satnav speed) - this is 4-up with a pretty full tank but I'm not sure it will go much faster!
Trevor
I've been reading the ads too much! The Ribeye 650 (with the Yamaha F150AETL) is regularly quoted as being able to do 50+ knots. However, I'm sure you're right that the actual real-world speed is somewhat lower.
__________________

__________________
neilda is offline   Reply With Quote
Old 12 May 2009, 18:29   #13
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by Nos4r2 View Post
Your prop hub isn't slipping if you're only making 4400 rpm.

Physically check for slime buildup. You'd be surprised how much difference a small layer makes. More importantly find out what pitch and diameter propeller you've got. You should be doing between 5000 and 6000 rpm at wide open throttle depending on how much load is onboard so either
a) You're overpropped
b)Your hull is filthy (or worse but unlikely , damaged somewhere out of sight)
c)You've got an engine problem.
Whoops teach me to read all the text properly!!!
__________________
codprawn is offline   Reply With Quote
Old 12 May 2009, 19:11   #14
Member
 
Hightower's Avatar
 
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,855
All of the above for problem solving. Plus one thing no one has mentioned. Are the throttle plates fully opening when the throttle lever is fully pushed forwards? It's easy to check!

I doubt that you will get more than about 40/42 knotts out of that package with a lightly loaded boat. Once you in the recommended WOT range it's More important to look at revs at verses cruising speed during set-up/prop selection.
__________________
Andy

Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
Hightower is offline   Reply With Quote
Old 13 May 2009, 04:06   #15
Member
 
Country: UK - England
Town: Southampton
Boat name: Shiver
Make: Zodiac Medline II
Length: 6m +
Engine: Yamaha F150
Join Date: Aug 2005
Posts: 80
Re:

I've seen 43knots out of my Zodiac Medline II with the Yam 150, which i believe is a heavier boat. That was close to pulling maximum rev's and probably half to fully laden at the time.
__________________
allegria is offline   Reply With Quote
Old 13 May 2009, 04:11   #16
Member
 
Country: UK - England
Town: Near Godalming
Boat name: AJA
Make: Ribeye
Length: 6m +
Engine: Yamaha F150AETX
Join Date: May 2009
Posts: 558
Just out of curiosity - what would a Yamaha 100 deliver in terms of cruising/top speed on a 6m RIB?
__________________
neilda is offline   Reply With Quote
Old 13 May 2009, 05:20   #17
Member
 
Country: UK - Scotland
Town: Gourock
Boat name: 5.8 Open Adventure
Make: Avon
Length: 5m +
Engine: Outboard
Join Date: Oct 2007
Posts: 25
Yam 150 on Avon 580 open adventure

With the Yam 150 on our Avon 580 we get 50mph at about 5800rpm
__________________
ryza00 is offline   Reply With Quote
Old 13 May 2009, 07:08   #18
Member
 
Bern Hanreck's Avatar
 
Country: UK - England
Town: Norfolk/Suffolk Borders
Boat name: La Bamba
Make: Ribcraft
Length: 5m +
Engine: F100 Yam / 5Hp Suz
Join Date: Oct 2002
Posts: 707
Just out of curiosity - what would a Yamaha 100 deliver in terms of cruising/top spee

Neilda.......I cruise comfortably at 25 Knts and have a top speed of about 34 Knts under normal ( quite heavily loaded conditions ) . I do believe that if I don't fuel up and ditch the passengers I can find another 5knts.....
__________________
Bern Hanreck is offline   Reply With Quote
Old 13 May 2009, 07:43   #19
RIBnet supporter
 
bedajim's Avatar
 
Country: UK - England
Town: Cambs/Northants
Length: no boat
Join Date: May 2006
Posts: 2,499
this may help

http://rib.net/forum/showthread.php?...&highlight=200
__________________
bedajim 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 22:22.


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