Reply
 
Thread Tools Search this Thread
 
Old 18 June 2020, 12:57   #1
Member
 
Country: UK - Scotland
Town: Dunfrmline
Boat name: Black Jem
Make: Ocean Pro 6.3
Length: 6m +
Engine: Suzuki DF140
Join Date: Jan 2020
Posts: 33
Humber Ocean Pro 6.3 Prop choice?

I've just purchased an Ocean Pro 6.3 with DF140 on the back.

Despite a couple of niggles I love the boat already.

I've done a few hours now in varying conditions. Max speed is approx 31-32kts at 5100-5300rpm. Prop on the back is 14x23, clearly too big given the low max revs.

I spoke to a lady at Humber today and she said I should use a 21. I've read on here that 19 is also used.

Just wondering what others prefer. I'm not looking for lighting acceleration but would like a decent cruise in the high 20 knots. Generally going to be and my two kids on board, exploring the west coast of Scotland and out to Isle of May for the odd fishing trip.

What max/cruise speed people are getting.

Thanks

Gav
__________________

__________________
Gav03830 is offline   Reply With Quote
Old 18 June 2020, 13:28   #2
Member
 
Country: UK - England
Town: Surrey
Boat name: ocean pro 6.3
Make: Humber
Length: 6m +
Engine: 140hp suzuki
Join Date: Feb 2004
Posts: 819
I used to have that exact same setup, had a 21” prop and was getting about 33/34 knots. I think 21” is the best balance
__________________

__________________
xpertski is offline   Reply With Quote
Old 18 June 2020, 14:07   #3
Member
 
Country: UK - Scotland
Town: Dunfrmline
Boat name: Black Jem
Make: Ocean Pro 6.3
Length: 6m +
Engine: Suzuki DF140
Join Date: Jan 2020
Posts: 33
Quote:
Originally Posted by xpertski View Post
I used to have that exact same setup, had a 21” prop and was getting about 33/34 knots. I think 21” is the best balance
Thanks for that. I think 21 was the standard size so not sure why it's got a 23, unless it's been taking heavy loads?
__________________
Gav03830 is offline   Reply With Quote
Old 18 June 2020, 14:18   #4
Member
 
Country: UK - England
Town: Surrey
Boat name: ocean pro 6.3
Make: Humber
Length: 6m +
Engine: 140hp suzuki
Join Date: Feb 2004
Posts: 819
Quote:
Originally Posted by Gav03830 View Post
Thanks for that. I think 21 was the standard size so not sure why it's got a 23, unless it's been taking heavy loads?


Yes possibly, it’ll be fine with that prop but I think as you say 21” is standard. Lovely boat, enjoy it!
__________________
xpertski is offline   Reply With Quote
Old 30 June 2020, 02:50   #5
Member
 
Country: UK - England
Town: sheffield
Boat name: barracuda
Make: Humber 7.6 mts
Length: 7m +
Engine: 200HP mercury
Join Date: Aug 2004
Posts: 179
i have a humber destroyer 7 mts with the new 200hp mercury ( new 2019)
i have a 4 bladed S/s prop 25" pitch think you should try the 21"Pitch
i have 1 for sale if you interested ( need to check if will fit)
call me
thanks
Stephen 07813207944
__________________
stepheneyre is offline   Reply With Quote
Old 30 June 2020, 02:54   #6
Member
 
Country: UK - Scotland
Town: Dunfrmline
Boat name: Black Jem
Make: Ocean Pro 6.3
Length: 6m +
Engine: Suzuki DF140
Join Date: Jan 2020
Posts: 33
Quote:
Originally Posted by stepheneyre View Post
i have a humber destroyer 7 mts with the new 200hp mercury ( new 2019)
i have a 4 bladed S/s prop 25" pitch think you should try the 21"Pitch
i have 1 for sale if you interested ( need to check if will fit)
call me
thanks
Stephen 07813207944
Thanks Stephen, I've got a 21 arriving in the post today.
__________________
Gav03830 is offline   Reply With Quote
Old 05 July 2020, 06:06   #7
Member
 
Country: UK - Scotland
Town: Dunfrmline
Boat name: Black Jem
Make: Ocean Pro 6.3
Length: 6m +
Engine: Suzuki DF140
Join Date: Jan 2020
Posts: 33
So we finally managed to get out with the new prop (21") yesterday . Managed to get 33-34 kts at about 5800-5900 rpm. Have read quite a few people managing 38-39 kts with same engine. We had about 90l of fuel and weight of two adults. Cruise was about 26kts at 5000rpm.

Thought I might be able to cruise at that speed at lower rpm. Should I try a 19" prop or be happy cruising at 5000-5100?

Apart from that I'm delighted with the boat and looking forward to a few weeks on the west coast later this month.
__________________

__________________
Gav03830 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




All times are GMT -5. The time now is 10:58.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.