New owner prop talk makes me dizzy

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New owner prop talk makes me dizzy

Postby Adisonjim » Mon Apr 08, 2013 11:10 pm

Ok so I just picked up a 2004 Caravelle 212 Interceptor with a 300hp merc. It has a 3 blade stainless steel prop that spins when u put it in the water. Besides that I don't know too much else... I'm coming out of a bass boat w an aluminum prop and going to a new boat in a new lake. Should I go w an aluminum prop since it is more forgiving? I don't plan on hitting anything but u never know since everything is new. Can u give me some advice? I will be taking friends tubing and wake boarding. What do u reccomend? Thanks so much for your advice Jedi caravellers
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Postby HOT PURSUIT » Mon Apr 08, 2013 11:22 pm

I'd definitely do some exploring and investigation of the new lake prior to pulling and/or just boating around. Locals should be able to help out. Fixes can be expensive and WORSE DANGEROUS! Have FUN and be SAFE Message
Adisonjim :lol:

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Postby Adisonjim » Mon Apr 08, 2013 11:32 pm

New lake new boat! I'm coming out of an 85hp bayline I smell trouble!
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Postby Muncie6spd » Tue Apr 09, 2013 6:00 am

Set your depth finder alarm to sound at least at 5 feet, that helps.

I would also stick with the stainless prop for now until you get an idea how well it works. You will need to know the pitch and diameter of the prop if you want to make a change. I have the 5.0 in my 212 and run a 21" pitch stainless 5 blade prop which works great for tubing and wakeboarding. I also have a 21" pitch 3 blade stainless which works well but does not have as much torque at lower speeds but does have a higher top speed than the 5 blade.

Since you have the 5.7 yours might have a 23 inch pitch prop. The size of the prop should be stamped on it somewhere, some are on the hub and some are inside the hub under the nut that holds the prop on.

Sizes are in inches, the diameter first, mine is 14.25" and the second number is the pitch which is how far the prop theoretically moves in one revolution.

Mike
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Postby HOT PURSUIT » Tue Apr 09, 2013 7:54 am

Hey Muncie! Curious as to what Rs your turning with the 3 blade 21P on a 5.0? HP stock was 250 horse and I ran a 19P 3 blade ENERTIA with top Rs at 4900. On the 350MAG pushing out 300 horse a 3 blade 21P should put him near WOT of 4800 Rs. HP is pushing 340 horse now and running a 22P on her with 1.47 gears and gets me to 4950. Just wondering.

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Postby AndrewT » Tue Apr 09, 2013 8:33 am

Hey HP , mine is a 270HP VP , with a 3 bladed VP SS 21" prop she does 5000RPM at 91kmph with a light load.
I also run a 4 bladed SS 19" Solas prop for tubing and wake boarding, she does 82kmph at 5000RPM , but it has a lot better holeshot and planes at a lower speed , and it's easier to drive for my wife to maintain a constant speed. The 4 bladed prop pulls like a tractor, the other day we had 2 people on kneeboards total weight of about 470lb ( me and my buddy) she got us out of the water without any hesitation. :D
2005 Interceptor 212
Volvo 5.0 GXi 270hp
21P 14.5 3B SS prop and 19P 4B SS for wakeboarding and tubing.
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Postby Muncie6spd » Tue Apr 09, 2013 11:31 am

HOT PURSUIT wrote:Hey Muncie! Curious as to what Rs your turning with the 3 blade 21P on a 5.0? HP stock was 250 horse and I ran a 19P 3 blade ENERTIA with top Rs at 4900. On the 350MAG pushing out 300 horse a 3 blade 21P should put him near WOT of 4800 Rs. HP is pushing 340 horse now and running a 22P on her with 1.47 gears and gets me to 4950. Just wondering.

HP


HP, it's been awhile since I ran the 3 blade, if my memory is correct it did about 4900 RPM at 56 mph. It's a 14.25" diameter Turbo prop whereas the 5 blade I believe is a 14.00X21 Mercury High Five, I will have to check for sure when I get it out of storage. The 5 blade will hit the rev limiter if I trim it out enough and will run about 52-53 mph on the GPS. I was surprised so little an amount in diameter made that much difference.

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Postby HOT PURSUIT » Tue Apr 09, 2013 6:13 pm

That's interesting you got that many Rs Mike. I would have thought the peak with a 21 would have been around 4500. You have a FI 5.0 right? Thanks for sharing


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Postby FasterDaddy » Tue Apr 09, 2013 7:45 pm

I have your same boat, and same motor. Started with a 21 Vengeance and moved to a 20 Enertia. I made this decision based on a spreadsheet on here and based mainly in Nuckle's result with the same boat and motor.

I agree with trying what you have this summer and ask yourself two things -- max RPMs approaching 5000? And does it have enough power/holeshot pulling? If either of these are "No" prop down an inch or two. A lot of folks here like the Enertia.
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Postby m_snow » Tue Apr 09, 2013 7:46 pm

I have the exact same boat/motor and I've tested about 6 different props. I boat just about every weekend during the season.

I'd suggest either a 20P 3 blade Enertia or a 18P 4 blade stainless. Of those two the 18P is my preference (got a 20P Enertia on right now.) Great handling because of 4 blade. Good hole shot for towing toys and full loads. Also, I'll never use aluminum again (different thread, just a preference.)

Often you can get used props on Ebay. For new try Ebay or I've seen great prop pricing at iBoats.com (no affiliation.)
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Postby Muncie6spd » Tue Apr 09, 2013 8:33 pm

HOT PURSUIT wrote:That's interesting you got that many Rs Mike. I would have thought the peak with a 21 would have been around 4500. You have a FI 5.0 right? Thanks for sharing


HP


HP, I may be wrong on the 3 blade RPM's, my memory isn't what it used to be but I definitely hit the rev limiter with the 5 blade with just me in the boat and trimmed out as far as I dared go; the tach showed a little over 5k RPM when the buzzer went off.
It creates a nice little rooster tail.

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Postby HOT PURSUIT » Tue Apr 09, 2013 11:20 pm

I believe that with the 5 blade Mike :lol: Looks pretty cool! :lol:

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