Turning Point Props any good???

[doggypaddle]

title says it all really! will a turning point prop be any better than a yamaha K series?
I am running a 17 at the moment and would like to try a 19" the turning point prop is an alternative.
any horror stories or tales of unleashed performance

[Hightower]

Originally Posted by doggypaddle

title says it all really! will a turning point prop be any better than a yamaha K series?
I am running a 17 at the moment and would like to try a 19" the turning point prop is an alternative.
any horror stories or tales of unleashed performance

I did lots of back to back testing for my BWM and Yam 80 years ago with 15, 17, 19 K series and 16, 18, 19 SS props and I doubt you'll get a better prop than the 17 K series for your set-up. You might get some minor benefits, but at a sacrifice to other elements (better top end, slower holeshot etc). When coupled in with the fact that if you hit something with a stainless prop you are more likley to damage gearbox parts as opposed to the alloy prop, it just isn't worth the time and expense IMO.

[doggypaddle]

so you rekon i need a 19" K series then ?
the old tub is a bit slow with the 17" i only get 32 knots,
need to get a tacho really, but as nos and matt get up to 38 knots with a 90 and an 85 running 19", and Nos has run 21" on his 85, i think the 80 should just about pull 19". i did try a 19" plastic prop of Nos's but spent more time ventilating it than getting anywhere
didnt realise turning point were SS? thought SS would be 18, 20, 22" and alloy 17.19.21 etc.

[Hightower]

Well with my set-up I was getting about 35knotts WOT and more like 32 knotts cruising. But then again I recon the BWM to be heavier than a Searider, had a very different hull design and could explain the lower performance I got. But I was quite happy with my old Tub.

What's acceleration like with a 17"er? If she doesn't dig in too deep and holeshot is fairly good then there might be some more to come. Please remember that some different models of the same outboard sometimes have different ratio's of gearboxes. This would affect what prop you throw and you might not be able to make a direct comparison with some one elses set-up.

The other thing to bear in mind is that a 90 over an 80 has more than 10% more power available and might well have more than 10% torque too for the same sized boat. This might make all the difference when choosing a prop.

All I say is please borrow a prop instead of buying one, otherwise you could be very dissapointed/

[doggypaddle]

I know youre right, i should try one first, but no one seems to have one!
perhaps i can Persuade Nos to let me try his next time were out together
the boat seems to pickup fairly well, and liz thought it sounded like the engine was revving well on the 17" but i mus admit i didnt think it was revving much.
without a tacho its all speculation! i need to try a prop! i know where youre coming from with the 10% thing but the two matts had 85 and 90 and rekon there was hardly any difference, both pull 19 well. an 80 shouldnt be a lot different to an 85
i certainly dont want to buy one thats no good, i aint made of money

[Hightower]

If you have to choose a prop then you won't get a better alloy one than the K series one from Yamaha.

[doggypaddle]

i will keep my eyes open for one on fleabay! even if its overpropped with a 19 it will do as a get you home anyway

[Nos4r2]

Originally Posted by doggypaddle

i will keep my eyes open for one on fleabay! even if its overpropped with a 19 it will do as a get you home anyway

Seeing as you're asking nicely, next time we're out at the same time and it's calm you can try my 19"

[BruceB]

Originally Posted by Hightower

If you have to choose a prop then you won't get a better alloy one than the K series one from Yamaha.

I tried four different ss props of different sizes/types in comparison to a 17K yam prop on my last boat and all were no better or even worse performance.

[doggypaddle]

i am gonna try matts michegan wheel match, and if thet works better than the K17" i am gonna get a 19"K