Author Topic: Another Prop to the Collection  (Read 149205 times)

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Offline David CVX-16

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Another Prop to the Collection
« on: March 10, 2011, 11:12:06 PM »
Purchased this prop on e-Bay, making it the fourth one of this identical 21" pitch bronze Quicksilver I own. This one is next to new after 40 years with some minor scratches that can be removed, and appears to have factory cupping, which was an option back then. Came in original box. Will sharpen the blades, remove the rough edges, and polish. This one is number nine (not including the "trophy Prop") in the collection, with the possibility of adding one more.


 
  
« Last Edit: February 07, 2012, 04:48:50 PM by Hyperacme »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline CVX Fever

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Re: Another Prop to the Collection
« Reply #1 on: March 11, 2011, 07:45:32 AM »
Guess I'm not the only one that keeps the box when I buy a prop. Nice find!
1979 CVX18 "Back in Black"....someday!
1985 CVX18 " Only thing better than 2 CVX18's is 2 girlfriends!

Offline Tonka Jim

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  • 1977 SSV 176 1989 CV 23
Re: Another Prop to the Collection
« Reply #2 on: March 11, 2011, 01:02:54 PM »

Dave,

Is that one going into the loaner pool this spring?
Now that my engine is running correctly, i really need to start testing props.

Jim
1977 SSV-176 / '85 115 Merc. - Mine
1989  CV 23 / 350 - 270hp - Kelly's
1968 V-174 / '73 140 I/O - Gifted to Son
1971 Seaking 14' / 1958 Evenrude 7.5 - Gifted to Grandson

Offline dorelse

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Re: Another Prop to the Collection
« Reply #3 on: March 11, 2011, 01:55:44 PM »
Ok...educate me....what does a 2-blade do/provide over a 3 or 4 blade propeller?
1990 Sierra 1700

Offline V153

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Re: Another Prop to the Collection
« Reply #4 on: March 11, 2011, 05:10:03 PM »
Ok...educate me....what does a 2-blade do/provide over a 3 or 4 blade propeller?
Higher top end. But they're not much good for anything else. ie: Holeshot, midrange.

Hey David what are the chances of ya re-hubbin one of those for us OMC guys to try? Heh heh.

Y'know if you keep this type of behavior up we're gonna have to start callin you the "Prop Monger", 'stead of Prop Hunter ...


« Last Edit: February 07, 2012, 04:50:14 PM by Hyperacme »
'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


WALK TALL AND CARRY A BIG BILGE PUMP

Offline Hyperacme

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Re: Another Prop to the Collection
« Reply #5 on: March 11, 2011, 05:30:52 PM »
Good score Dave !
Now make her shine !

" Higher top end. "
Best for smaller/ligher boats looking for top speed.

Offline David CVX-16

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Re: Another Prop to the Collection
« Reply #6 on: March 11, 2011, 09:29:19 PM »
The advantage of two blades over three or four is that there are fewer blades cutting the water and creating resistance. The disadvantage is that they are slow out of the water and can not carry heavy loads because of the smaller blade area. They should also be balanced because there are only two blades. The bronze blades are thin and sharp.

In real words testing two years ago, this two blade bronze prop GPS's at 52.9  MPH versus 51 MPH with a Ballistic 21" three blade stainless steel and 49 MPH with a 20" Laser II stainless steel. Every boat and motor is different, and only by testing several can you find out the best.

This 21" Bronze prop was running 5,400 RPM at 52.9 MPH. The newer 115 HP Mercs have better porting and breathing and can turn higher RPMs and the 21" may still be the best prop for the 1988 115 HP Mercury, maybe 56 or 57 MPH at 5,800 to 6,000 RPM for a short distance, not sustained. If RPMs are too high, have a 23" pitch 2-blade bronze to try.

It will be interesting to try the props, even compare MPH between the four identical ones.

We'll have to have a prop testing day.

Doug, they could be refitted for the OMC motors. A prop shop was going to fit a OMC Raker to my Mercury.





  

 
« Last Edit: March 11, 2011, 10:58:49 PM by David V-153 »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Hyperacme

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Re: Another Prop to the Collection
« Reply #7 on: March 11, 2011, 09:48:13 PM »
It will be interesting to see which prop will give you your best speed with the new Merc ...

Offline Glastron_GT160

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Re: Another Prop to the Collection
« Reply #8 on: March 12, 2011, 07:08:54 AM »
Nice score David,

It will be interesting to view the data once your testing begins.  I'm especially interested to know how all of them work with your new powerhouse.

Melt snow melt!

Offline David CVX-16

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Re: Another Prop to the Collection
« Reply #9 on: March 12, 2011, 07:21:27 AM »
The unknown factor is the height of the motor. The bronze props need the lower motor height for bite, and the stainless steel need a higher motor setting because they are surface props.

Chris, maybe the answer is the manual 4 in 1 jackplate with 2" setback from Bob's Machine Shop where the height of the motor can be adjusted up and down.   
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Hyperacme

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Re: Another Prop to the Collection
« Reply #10 on: March 12, 2011, 07:34:41 AM »
They ( Jackplates )  come up on CL once in a while or eBay should have it.

Offline Rosscoe

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Re: Another Prop to the Collection
« Reply #11 on: March 13, 2011, 08:50:10 AM »
Looks like I am going to have to repower with a 150 or I'll never catch up/keep up with you David.  ;D
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline David CVX-16

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Re: Another Prop to the Collection
« Reply #12 on: March 13, 2011, 07:20:45 PM »
Ross, the right prop will add alot of speed to what you are running now. The right prop is the same as more horsepower.
« Last Edit: March 13, 2011, 09:51:14 PM by David V-153 »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline David CVX-16

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Re: Another Prop to the Collection
« Reply #13 on: March 18, 2011, 08:49:38 PM »
Another prop to the collection, a Ballistic 22".  




« Last Edit: February 07, 2012, 04:52:40 PM by Hyperacme »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Hyperacme

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Re: Another Prop to the Collection
« Reply #14 on: March 18, 2011, 09:19:44 PM »
Your other Ballistic was a 21P ?
Your stocking up the arsenal ... LOL
We might be boating on lakes this spring, with all the flooding in the forcast !

Offline David CVX-16

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Re: Another Prop to the Collection
« Reply #15 on: March 18, 2011, 09:24:47 PM »
Gregg, yes the other Ballistic is a 21".

Get the home projects out of the way early to enjoy the shortened Minnesota boating season of 2011.
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Rosscoe

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Re: Another Prop to the Collection
« Reply #16 on: March 18, 2011, 09:27:39 PM »
Ross, the right prop will add alot of speed to what you are running now. The right prop is the same as more horsepower.

It will certainly help but I can not get the RPM's out of my 4 cylinder that you guys with the 6's can. 5K max recommended by the rebuilder and confirmed by Steve. Back to restraining myself.  :(
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline David CVX-16

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Re: Another Prop to the Collection
« Reply #17 on: March 18, 2011, 10:50:55 PM »
Ross, either the 21" 2-blade bronze or 21" Ballistic should run well at 5,000 RPM. I forgot if you have a tach or not. If not, you should get one installed or else use a hand held one just for testing.
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline David CVX-16

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Re: Another Prop to the Collection
« Reply #18 on: March 24, 2011, 10:55:35 PM »
Another prop to the collection, this one a 23" pitch in case I ever need to go that high in pitch. This one purchased from Chris in Canada in great shape, just needed the blades sharpened, prop shop number removed, and polished.





« Last Edit: February 07, 2012, 04:55:18 PM by Hyperacme »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Glastron_GT160

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Re: Another Prop to the Collection
« Reply #19 on: March 25, 2011, 06:27:37 AM »
Looks great David...  glad you will make use of it.