Prop for a 2000 90hp Merc

[eastman03]

Hi Guys
I have a 2000 Lund SS Angler 1700, weighs about 750 lbs I believe. It came with a quicksilver prop, 15 pitch 13.75" Diameter that was getting dinged up. It ran about 39mph with a medium load at 5500 or so RPM, which is good. Manufacture says 5000-6000 is what you are shooting for with the motor at wide open throttle. I need a replacement, so I order (from Iboats), a turning point Hustler prop, (http://boatpropellers.iboats.com/Turning_Point-Hustler-Propellers/H2-1315/?*******=716203649) 15 pitch 13.75" prop, thinking it would give me the same good performance as the other prop. I put it on and used it and it blows out (over revs) on take off, and I get about 34-35mph at 6000 RPM. What the heck? Why are these two statistically identical props acting so different.
Anyway my main question is, should I just move up to a Turning point Hustler 17pitch prop? Or a quicksilver 15 pitch?? I'm not sure anymore. (these are all 3 blade aluminum btw).
Thanks for any insight guys.

 

[Texasmark]

Re: Prop for a 2000 90hp Merc

I have the same engine only 2 yrs younger. I have a Turning Point Hustler that I bought just to see how this so called hot dog alum prop stood up to my high performance Ballistic SS props. I did not exactly match my props and being 2 different materials made a big difference. Also the diameter was larger on the Hustler at 14 1/4 with 23P. My boat is 17' alum with a flat, but 3 stepped hull...gets on plane pretty good considering weight aft and top end is 50 ish.

I'm pulling out the data sheet I made in comparing it to my Ballistic XL 13 1/4 x 24.

WOT was Hustler 44 mph @ 5000.....obviously too much pitch for a prop on this rig.
Ballistic 50 mph @ 5600....perfect.

As you would expect the hole shot was nice and smooth, very controllable with the Hustler. I really liked the hole shot even though this was too much prop for the engine. I did not notice the effect of any ports kicking in (detectable rpm increase) but they had to be relieving the engine or it would not have been as smooth and solid as it was.

The Hustler held tight in hard turns at reasonable trim angles. Had to trim it up pretty far to get it to start ventilating. Ballistic would pickup a couple hundred rpm's in tight turns (it wasn't ported at the time).

Being the larger diameter and slightly less pitch, it controlled the boat very well in the 25 to 35 mph range; I could set the boat attitude where I wanted it and it stayed there. Ballistic was fine, but there was a notable difference.

Now the rest of the story. The Hustler was made for the larger 4 3/4 gearboxes like the 150 and up use. I adapted it to fit mine so the exhaust hub was larger in diameter. It did not protrude out beyond my engines gearbox housing however. I don't think this made any difference one way or the other. The Hustler had all the goodies of a good high performance SS prop, as advertised, but had thicker blades, being aluminum, which will cost you some mph on the top end. I couldn't get enough pitch in the Hustler at my mid sized hub size, I think 21p is as high as they went and I wanted to get something to compare to my 24P SS so that is why I went to the larger hub where they had the higher pitches.

I think that if I put a 13+ x 21P on my boat, that is made for my gearbox size, it would run out very well. I'd probably get my rpms back to where they are with the Ballistic, but might loose as much as 5 mph on top end which I don't really want to do just yet, but if 45 vs 50 doesn't make a big deal to you I think the Hustler is a good buy. I think I paid $99 for mine through iboats.

I don't understand why you blow out on hole shot. What you could be experiencing is the effect of the ports which deliberately allow the engine to rev in the hole shot which unloads it, gets it's rpms up thus developing it's HP faster and improving your hole shot. If that's the case the rpms will move up a couple hundred roughly and pretty much stay there (won't go wandering wildly all over the place) and once you clear the hole and get some mph under your belt, there will be a point where the rpms will drop instantly. That's the point where you lock up and the holes are out of the picture.

HTH,
Mark

 

[steelespike]

Re: Prop for a 2000 90hp Merc

I'm thinking the ports may be too much for your setup.As I understand it you can get inserts to make the holes smaller or eliminate them.

 

[pootnic]

Re: Prop for a 2000 90hp Merc

The Quicksilver might be totaly different again.The only information you have now is on the new Hustler and based on the information giving a 17 might be the way to go.
I can see why your asking the question though but all props are alittle different.Thats why it's probably better to work locally so you might be able to switch props till the right one is found.

Either that or put your old dinged prop back on...or ding the new one up to exactly match it(couldn't help myself)

 

[Texasmark]

Re: Prop for a 2000 90hp Merc

I'm thinking the ports may be too much for your setup.As I understand it you can get inserts to make the holes smaller or eliminate them.

Quite possibly. I ported my Ballistic (1/4") considered a small port and noticed a nice clean hole shot, no detectable rpm increase however....apparently they were they were there but were not that much higher than non ported, but did notice some blowout when running in a good chop that I didn't have before at WOT. If I trimmed down a few degrees, knocking some top end mph off, it would lock back up and quit ventilating. Rpm's would run up a couple hundred and hold.

Mark

 

[eastman03]

Re: Prop for a 2000 90hp Merc

Thanks for some of the advice guys, but the only thing is the 15 pitch aluminum TP Hustler I bought does not have any port holes! I think they only start porting them at 17 or 19 pitch and higher. I'm not sure.
I do get higher rpm on take off, and there is a point when I'm planned out when the RPM's drop suddenly when I have some speed. Still don't like the top end though.

 

[fishin98]

Re: Prop for a 2000 90hp Merc

I have a Bayliner 1802 Capri with a 2000 90 Merc, I run a Solas Amita 4blade 19p($100 at *********) I top out at 42MPH 5600rpm-5800rpm. Great hole shot,gets up and stays on plane at a lower rpm, than my old 3blade 19p. Something to look into!

 

[eastman03]

Re: Prop for a 2000 90hp Merc

Do you think my boat and motor could handle a 19pitch 4 blade prop? My TP hustler prop does not have ports, I think my safest bet is to get a 17 pitch prop of the same brand and see if it works. If not, back to the drawing board. It is a real frustrating game trying to find the right prop. Wish I wouldn't have dinged up my old one.

 

[jestor68]

Re: Prop for a 2000 90hp Merc

Is there some reason why you did not replace it with the identical Quicksilver prop?

A quick check of the iboats prop section shows it right there.

 

[eastman03]

Re: Prop for a 2000 90hp Merc

No particular reason no, I guess the TP prop was cheaper, which I'm now regretting.

 

[Texasmark]

Re: Prop for a 2000 90hp Merc

Thanks for some of the advice guys, but the only thing is the 15 pitch aluminum TP Hustler I bought does not have any port holes! I think they only start porting them at 17 or 19 pitch and higher. I'm not sure.
I do get higher rpm on take off, and there is a point when I'm planned out when the RPM's drop suddenly when I have some speed. Still don't like the top end though.

That sure smells of porting. Ports are one per blade, a small hole just under and back slightly from the leading edge of the blade. The rpm increase is deliberate ventilation caused by the hole allowing gas across the blade and unloading the engine and the drop in rpms later is when sufficient water pressure is available from water rushing by the prop to essentially close off the hole and only pure water goes across the blade and the engine loads back up.

Mark

 

[eastman03]

Re: Prop for a 2000 90hp Merc

I checked again just to be for sure, there are no holes anywhere on the blades or shaft or anything, just solid aluminum. No port holes. I can provide pictures if you need further proof lol. I think I have a used 17 pitch prop lined up for this weekend to try, I'll give an update if that seems to work better.

 

[sublauxation]

Re: Prop for a 2000 90hp Merc

I bought a 17P Hustler for my 90hp evinrude and had much the same results as you as compared to my OMC 17P prop. It blew out and I lost a couple hundred RPM's. I've been told they tend to act like a higher pitch prop. My Hustler prop isn't ported either. At least you'll have a spare, otherwise they sell pretty quick on Ebay.

 

[Texasmark]

Re: Prop for a 2000 90hp Merc

I bought a 17P Hustler for my 90hp evinrude and had much the same results as you as compared to my OMC 17P prop. It blew out and I lost a couple hundred RPM's. I've been told they tend to act like a higher pitch prop. My Hustler prop isn't ported either. At least you'll have a spare, otherwise they sell pretty quick on Ebay.

Wonder where the start porting and what determines the point, hole size?