Too Much Prop

Post by **Seabass81** » Sun May 31, 2009 9:02 am

Well with my nitro I find I am spending alot of time looking at the sky while taking off. There is a 5 second lag where my rpm's stay the same before the nose finnaly drops.

I am running a 75 hp tracker on a nitro 170 dc. When I bought the boat I was told she was slow to get on plane. The prop that came with it was a trophy 4 blade ss 23p.

What kinda prop are you running on your 75? I am thinking of dropping to a 3 blade 13x19.. Think it will do?

Oh and the prop will be for sale next week so if interested let me know

John

Post by **lifeisfun** » Sun May 31, 2009 9:49 am

Get Nauticus Smart tabs you will love the performance.

Post by **jwhite** » Sun May 31, 2009 12:40 pm

lifeisfun wrote:Get Nauticus Smart tabs you will love the performance.

I'm going to have to agree....though I've never run a set I sure know of people who have....with great success. Mostly people, like yourself, that have boats that are slightly underpowered.

Second option is those fins that attach to the cavatation plate. They're cheaper but the tabs are definately the better option in my opinion. I ran one on a previous boat and it got me up on plane in a jiff.

You're on the right track with a 4 blade prop though but you seem to be too high in pitch. Dropping down to a 19p or 21p 4 blade just might be the ticket....not sure you need to go SS with that engine. What are your rpm's at WOT?

Post by **WallyPro** » Sun May 31, 2009 2:56 pm

Adjusting the trim as you take off might help... maybe. It helped on my old ski boat anyway, no idea how it would work on a Nitro though.

Post by **Aube** » Sun May 31, 2009 4:01 pm

If your willing to spend 10 bucks go to www.canadapropeller.com and they will tell you what you need based on your boat, engine, gear that you typically carry and typical use. I used them last week, if I buy from them I'll get my 10 bucks back.

Post by **toobinator** » Sun May 31, 2009 4:15 pm

What's your rpm at WOT? That would help determine how much pitch to drop down.

Ed

Post by **basshunter1** » Sun May 31, 2009 6:37 pm

3 blade 17 or 19 pitch 13"

Post by **steadyj_17** » Sun May 31, 2009 6:44 pm

go to the following site and follow the prop selector tool

http://www.turningpointpropellers.com/

Post by **CNs** » Sun May 31, 2009 6:59 pm

Xcal165 wrote:If your willing to spend 10 bucks go to www.canadapropeller.com and they will tell you what you need based on your boat, engine, gear that you typically carry and typical use. I used them last week, if I buy from them I'll get my 10 bucks back.

or if you had al that info you could have gone here for free.

http://sites.mercurymarine.com/portal/p ... ema=PORTAL

Post by **Aube** » Sun May 31, 2009 7:13 pm

ChampionNorm wrote:
Xcal165 wrote:If your willing to spend 10 bucks go to www.canadapropeller.com and they will tell you what you need based on your boat, engine, gear that you typically carry and typical use. I used them last week, if I buy from them I'll get my 10 bucks back.
or if you had al that info you could have gone here for free.

http://sites.mercurymarine.com/portal/p ... ema=PORTAL

Wish I had that site a week ago! Good news is it gave me the same info as before. Anyone have any experience with the composite props?

Post by **Seabass81** » Sun May 31, 2009 7:16 pm

I only had the boat out once andhad it wot for all of 5 seconds. I will be out tuesday to play around and keep note. Just too ruff last time to be playing.

Thanks for all the great advice.

Post by **mikemicropterus** » Sun May 31, 2009 8:39 pm

Before I answer your question like the tubeinator asked whats WOT rpm and what is your engine heigth.

I don't like foils nor tabs as they just mask a poorly set-up boat.

Post by **lifeisfun** » Mon Jun 01, 2009 4:26 am

mikemicropterus wrote:Before I answer your question like the tubeinator asked whats WOT rpm and what is your engine heigth.

I don't like foils nor tabs as they just mask a poorly set-up boat.

I'm afraid you are wrong on the tabs part ...
There's no power boat that would not benefit with tabs installed

http://www.nauticusinc.com/testimonials ... ticus.html

Post by **CNs** » Mon Jun 01, 2009 5:44 am

lifeisfun wrote:
mikemicropterus wrote:Before I answer your question like the tubeinator asked whats WOT rpm and what is your engine heigth.

I don't like foils nor tabs as they just mask a poorly set-up boat.
I'm afraid you are wrong on the tabs part ...
There's no power boat that would not benefit with tabs installed
http://www.nauticusinc.com/testimonials ... ticus.html

oh-oh......

Post by **WallyPro** » Mon Jun 01, 2009 5:51 am

This isn't just about the taking off and time to plane is it? Does this translate to overall fuel economy and performance?

Time till plane is basically irrelevant... why do you care? If you're looking at the sky then you're motor isn't trimmed properly. Trimming adjstments while you're taking off are a good way to speed up the time till plane... if you're really that impatient, but it does save gas if trimmed correctly. Overall fuel economy is more important than time till plane unless you're in a race. Are you? With other boaters?