Humber 600 df 140 prop size

antoine · 24 April 2007, 07:59

Hello,

I tried my new rib last monday, and the propeller is too short.

The prop is a 14X19.

Max speed 36knt with 6300 rpm.

If someone with the same boat can help a poor french ribman...

I think a 14X21, or perhaps a 14X23 could be a better choice.

Thanks

Antoine

Tim M · 24 April 2007, 08:11

6250 is the max revs for that engine so it sounds like its reving about right at wot....

antoine · 24 April 2007, 08:14

The problem is that i can push more the engine...

BogMonster · 24 April 2007, 17:08

Quote:

Originally Posted by antoine

I tried my new rib last monday, and the propeller is too short.

It isn't supposed to reach the bottom though

Sorry I could not resist that obvious and extremely poor joke

Top banana · 24 April 2007, 17:46

I run with a 14x21 ally on my 6.2 which carries some weight, 37knts at 6,000 revs WOT. you dont sound to far off the mark considering that mine is a sports hull,

Erin · 24 April 2007, 20:20

Bonjour,

I changed from a 14x19 on my suzuki df 90 to a 14x21 and it reduced the revs by about 600. Combien coute le propulseur 14x21 en France (et le 14x22 inox)?

Keith

tamsrib · 24 April 2007, 20:53

hi i have same new humber with a yamaha 115 four first trip last week and am getting identical performance
let me know how you get on if you do change prop

adonf · 27 April 2007, 19:33

if your boat is not able to exceed 36 knots sell it my friend or buy an Italian boat

sorry

A+ Adonf

antoine · 28 April 2007, 07:48

My dear Adonf,

I hoppe that you will never say one more time that you don't speak english...

For our trip, you will speak and i will drink.

Antoine

adonf · 28 April 2007, 08:36

I used my friend google ;

For our trip, you will speak, it's better your boat is too slow but it is beautiful

A+ Adonf

antoine · 30 April 2007, 07:25

I tried yesterday a 14X21 prop.

It was better, but...

With five persons on board, 37,7 knt, but still 6200 (at least) rpm.

It's too much, and i will try a 14X23 next week.

Antoine

isla · 30 April 2007, 07:37

Quote:

Originally Posted by antoine

Hello,

I tried my new rib last monday, and the propeller is too short.

The prop is a 14X19.

Max speed 36knt with 6300 rpm.

If someone with the same boat can help a poor french ribman...

I think a 14X21, or perhaps a 14X23 could be a better choice.

Thanks

Antoine

in theory to pass from 19 " to 23 ", the motor would have to come down of 800 turns the average e' 200 turns to inch

antoine · 21 May 2007, 12:03

Hello,

I tried a 14X23 prop last WE and it seems to be better:

42 knts and 6100-6200 rpm.

Two persons on board, about 85 L...

Antoine

Biggles · 21 May 2007, 12:15

A + Adonf,

I have doen some research on my Suzuki DF 140.

Below is the link.

http://rib.net/forum/showthread.php?...uzuki+140+prop

Basically I ended up with a custom 22" prop. Far better than the Suzuki job. Just waiting for a new one as I've bent my old one but thats another story.

Regards Nick.