The current prop is 3 blade 13x21 on the main dealer website it specifies swinging a 15x 23 .The rev range is 5-6000 and my engine revs to the top end of this range I am thinking on a new s/s prop and would like to decrease the revs slightly for a more relaxed ride has any one got any ideas or experience with this set up We occaisionally pull the odd toy but generally 2/3 up cruising thanks .
I've got the DF 90 and went up from a 19 pitch to a 21". It brought the revs down from about 6100 to around 5800. It's 14" diameter. The suzuki stainless props go up in even numbers so you'd probably need a 22".
I've just checked my workshop manual and it states 14" diameter for the 90 and 115.
Mine's got a 3x14x19 ally prop - I'm also thinking about putting a s/s prop on for a bit more 'bite'.
However - when I measured the unit, a 15" diameter prop won't fit. So I looked more closely at the Suzuki spec pages. The 15" 23" is not a 15x23 prop, but the range of pitch suggested. So don't go ordering a 15" prop unless you want a re-styled a-v plate.
Ok thanks guys. Steel developements have a 13 7/8x 21 or a 13 7/8x 23 both in s/s
what effect will raising the diameter by 1 inch have on performance also I tend to think that the 23 will be to much of a jump .
I'll be interested to hear how a new prop goes. I'm new to RIBS and still trying to work it all out!
I was talking with the Suzuki dealership last week about a new SS prop for my DF 115. I've a standard issue aluminium (not sure what size) that seems to perform OK and revs to 6000 at WOT so I assume it's pretty close to the right size. They thought a SS prop wouldn't be worth the cost of an upgrade - at least in terms of economy, durability and performance. So I'll leave an upgrade for now.
Interesting - my Humber (5.8m) has a 14x17 prop on, got a 19" pitch one on order should arrive in a couple of weeks, but maybe I should have gone for a 21 after all....
I'd be interested to know how you get on with 115hp in 6m of boat with whatever you choose, I may yet have to order another one (more expense, sigh...)
Have my new stainless prop ,ordered from steel developments,very helpful and delivered next day Its all fitted and ready to go Its a 13 7/8 x 23 I,m rather hoping it doesn,t drop my revs down too much but were soon gonna find out,only then will I know wether its a waste of money or not.
Interesting - my Humber (5.8m) has a 14x17 prop on, got a 19" pitch one on order should arrive in a couple of weeks, but maybe I should have gone for a 21 after all....
I'd be interested to know how you get on with 115hp in 6m of boat with whatever you choose, I may yet have to order another one (more expense, sigh...)
Take care when comparing propeller pitch on different motors, because the gearbox ratios aren't always the same. A 19" pitch prop on one motor may give the same final 'gearing' as an 18" pitch prop on another.
I have a DF115 with 14/21 prop and looking to move to S/S. We heavily load the boat with divers and flat out is often 25 knotts at 4500 revs. I've seen at 13/21 4 bladed. Any thoughts? Changing the pitch is well documented - how much change will 1" off the diameter make?
