Reply
 
Thread Tools Search this Thread
 
Old 10 July 2006, 05:26   #1
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
prop advice experience

I recently bought a Valiant 490 with a suzuki DF70 .
I have no experience of other boats so can only go by gut feel and advice , but I think the engine will pull a 19" prop instead of the existing 17".
This seems to be the opinion of the cornish ribbers but not having had time to actually test with a gps revs for speed etc or get anyone else to drive the boat I can't be sure .
All I can say is the feel of the boat and the way it accellerates it feels like it could be bit low geared . Peak revs are about 6000 but haven't taken an exact note .
The prop I have fitted is a 13 1/4 x 17 13 spline .

What Iam looking for is iether a secondhand 13 1/4 x 19 prop or a loan prop .
It could be an expensive mistake to order a new prop if its not what i need
if Any one who has the same set up could advise me then I would be grateful.

Also any info of what props are the same spline would help .
__________________

__________________
ian parkes is offline   Reply With Quote
Old 10 July 2006, 05:58   #2
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
You're definitely overrevving-max rpm should be 5800 (I googled your engine)
The link below might help.

http://www.boatinglife.com/product.j...873C13?ID=3444

Did the previous user do a lot of skiing or tow toys?
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 10 July 2006, 06:50   #3
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
Quote:
Originally Posted by Nos4r2
You're definitely overrevving-max rpm should be 5800 (I googled your engine)
The link below might help.

http://www.boatinglife.com/product.j...873C13?ID=3444

Did the previous user do a lot of skiing or tow toys?
It was a diveboat Nosser, nuff said.
__________________
Mollers is offline   Reply With Quote
Old 10 July 2006, 08:10   #4
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
Quote:
Originally Posted by Mollers
It was a diveboat Nosser, nuff said.
The owner used it a bit for diving but, as I understand it was only for him and his wife , I don't think it was a dedicated dive boat carrying loads of divers , its not big enough , the rack would only carry 4 cylinders and with only approx 60 hrs use ??

Maybe it was specced as a dive boat , who knows but I have got to try it out with a GPS and check the revs properly .
As i have just said to Roy making it pull a higher ratio would make the slow speed handling more difficult in rough water as the engine could be labouring ?? Just my feelings
__________________
ian parkes is offline   Reply With Quote
Old 10 July 2006, 09:27   #5
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
In my (limited) experience, with the max pitch prop on mine possible it becomes awkward in tall waves (7'+).The engine laboured and wouldn't plane unless I surfed down them 1st but in normal weather it went like a rocket.It took pretty extreme conditions to create a problem though- wind against tide blowing force 7-8 in Old Harry tide race.

Most of that was because I couldn't get the searider flooding hull to drain though so in theory you should be ok as long as you're within manufacturers recommended WOT rpms.


I'm not 100% sure this is correct-someone call me a tosser if I'm wrong!
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 10 July 2006, 11:17   #6
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
Well what you are saying sounds reasonable to me and also goes along with what I felt in a following swell at the weekend .
Its all very well gearing the boat up to go like hell on flat water and cruise well at low rpm but if that makes the trip home a nightmare when it blows up rough then Ill leave it as it is .
I have been told by a suzuki dealer that my 17 pitch prop is standard on a DF70 and a valiant dealer also said they send them out with standard prop. so I aint panicking to get one this week , just incase we go to Scilly again
__________________
ian parkes is offline   Reply With Quote
Old 10 July 2006, 12:36   #7
ADS
Member
 
Country: UK - England
Town: Dorset
Length: 4m +
Join Date: Oct 2003
Posts: 1,410
Lets see some pics of the new boat Parksey, I did after all find it!
__________________
ADS is offline   Reply With Quote
Old 10 July 2006, 12:40   #8
Member
 
randski's Avatar
 
Country: UK - England
Town: Cornwall
Make: Waveline
Length: under 3m
Engine: Yamaha 2.5
Join Date: May 2005
Posts: 421
Here it is

__________________
Bob
randski is offline   Reply With Quote
Old 10 July 2006, 17:41   #9
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
Quote:
Originally Posted by ADS
Lets see some pics of the new boat Parksey, I did after all find it!
Oh well done Bob , you are a star mate .

And thanks ADS if I had been 10 mins later getting to this I would have lost it , if you get down here come for a trip and the drinks are on me , been too busy loving the boat to post here lately .

__________________
ian parkes is offline   Reply With Quote
Old 10 July 2006, 17:46   #10
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
oh and that smooth suzuki better then any 2 stroke coughing death out the back awaiting its final total loss stroke.
Sorry 2 stroke owners remarks made for the benefit of a fellow cornishman who has insulted our Suzuki's once too often .
__________________

__________________
ian parkes 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 23:09.


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