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Author Topic:   Hi Five stainless prop?
Dan posted 05-31-2001 08:55 PM ET (US)   Profile for Dan   Send Email to Dan  
Anyone have any experience with a Merc Stainless 12.75x20 HiFive five-bladed prop or with a stainless 13.75x19 Trophy plus four-bladed prop. Would be used on 1999 17 Outrage with 115 Merc that currently has a 12.75x21 alum prop.
Dick posted 05-31-2001 09:35 PM ET (US)     Profile for Dick  Send Email to Dick     
I haven't run either prop on a whaler, but on other boats the Hi5 is a great water ski prop, great hole shot. But a loser on the top end. The Throphy 4 blade was designed as an all around offshore prop. Good low end,no cavitation in the turns and minimal loss at the top end.
Try befor you buy.
Dan posted 05-31-2001 10:47 PM ET (US)     Profile for Dan  Send Email to Dan     
Unfortunately, I can't try before I buy because the dealers don't have demos for my size engine. Whatever prop I get would cost me, through a connection, about $400. At WOT I reach 45mph. The most I really want to do is 30mph, so losing a bit off top end isn't too bad. Quicker hole shot and better fuel economy would be great.
Dick posted 05-31-2001 11:09 PM ET (US)     Profile for Dick  Send Email to Dick     
In my opinion I think the 4 blade would be a better prop.
I managed parts departments for years and I can't believe a dealer would stick you with a prop if it didn't work for you. If you have a prop repair shop in your area go to them, they are usually a lot more helpful.
Clark Roberts posted 05-31-2001 11:34 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Dan, wish you were closer to Daytona Beach as I have a Hi-Five 20" hanging on the wall. I took it off a 90 Merc (17 Newport) when I sold the motor. It is a fantastic prop and as far as I could tell didn't loose any top end. My Newport would hit 50mph and never did that with any other prop.. and I tried the 4 blade Trophy which didn't perform well with my particular set-up... By all means try before you buy if at all possible... Clark
lhg posted 06-01-2001 01:47 PM ET (US)     Profile for lhg    
Dan - You're going to get up to three different opinions here, since Mercury only makes 3 styles of higher performance props for your engine and 4 1/4" gearcase, the 3 blade Laser II, the 4 blade Throphy Plus, and the 5 blade Hi-Five. So here's a third!

I just went through the same decision for my 18 Outrage with 115 Mercs. Based on everything I could find in Mercury's prop literature, I selected the Laser II props.
I have also run these on my 25 Outrage for 12 years. They are super, especially for lightweight hulls, like a Whaler, and with good power. Your Whaler will feel like a completely different, better performing, boat.

Like Clark, I had a bad experience with the Trophy props. I hated them. BUT, mine were the original Trophy I models, and I understand they have been redesigned and now are much better, with the variable venting system. But I'm now gun-shy about them, and have no experience with the new design, although Mercury engineers now say they are great. So I had to choose between the 3 or 5 blade designs. Besides being recommended as the best water ski prop, the 5 blade is also highly rated for great holding in rough water, but most will admit it will not run as fast as a Laser II.

Here are Merc's recommendations (from latest propeller catalog) for boat type for the three types, which will show you why I selected Laser's.

HI FIVE: Aluminum Outboard, Ski Boat Outboard, Bass Boat Outboard, Flats Boat Outboard, Walleye Boat Outboard, Ski Boat Sterndrive. (none are my idea of an Outrage)

TROPHY PLUS: Aluminum Outboard, Bass Boat Outboard, Flats Boat Outboard, Walleye Boat Outboard. (none fit an Outrage)

LASER II: Aluminum Outboard, Bass Boat Outboard, Walleye Boat Outboard, OFFSHORE SINGLE OUTBOARD, OFFSHORE DUAL OUTBOARD (CR), Sport Boat Single and Dual Outboard. (I think a BW Outrage fits this category) will send you one of these for $365., no sales tax, and about $15 shipping. Best prices I have been able to find on Merc props.

I should also say that this discussion refers to prop for the 70-125HP range engines. The V-6 applications and offerings are different,
with only the Laser II overlapping.

One final word, when switching to any one of these from an elephant ear aluminum, you should raise the engine one (definitely) or two (possibly) bolt holes, as these props are designed to run surface piercing.

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