Hi all just a question for hwsiii about prop selection.
1. Year, make and model of boat
1972 Pride Capella
See... http://news.google.com.au/newspapers?id=21EVAAAAIBAJ&sjid=cOUDAAAAIBAJ&pg=3218,1636805&dq=pride+capella&hl=en
2. Length, width and base weight of boat, look for boat decal on back of boat
13ft2in, 5ft7in, 450lb without motor, 635lb with motor
2a.What is the maximum recommended HP for your boat
80hp
3. Number of people and gallons of gas normally on boat
2 adults...13 gallons of gas (450lb)
4. What do you use the boat for
60% - fishing
40% - kneeboarding, wakeboarding
5. Is it a Deep Vee and if so how many degrees of Deadrise
No, 18degrees deadrise
6. Year, manufacturer and model of motor
1974?, mercury blueband 402
7. HP and gear ratio of motor IMPORTANT
If you don?t know the ratio, you need to pull the plugs out and put a piece of tape across the prop and the lower unit and then cut it between the prop and the housing then do the same thing on the flywheel and turn the motor until the tape lines up with each other on the prop, it is easier if two people do this, so one can watch the prop while the other counts the revolutions of the motor
40hp, 2:1 Gear Ratio
8. Manufacturer?s recommended Wide Open Throttle (WOT) range
4800-5300 RPM
9. Anti-ventilation Plate height above the bottom of the transom of boat if it is an outboard in inches, use a straight edge or a board under the keel and sticking out to the anti ventilation plate for a reference, and take about 4 pictures for us to see.
about even
10. Is it a bass boat or does it have a pad bottom
no
11. Does it have a hydrafoil, dolefin or trim tabs
Has trim tabs
12. Manufacturer, model, diameter, pitch, number of blades and whether SS or aluminum props.
IMPORTANT
Merc Quicksilver, 11.5? diameter, 13 pitch, 3 blades, aluminium
13. WOT RPM and speed from your current prop and how much gas and how many people were in the boat for the test data and is the speed by GPS. Make sure you trim the prop up until it starts ventilating and then just trim in until it quits ventilating. If you do not have a tach you can buy a Tiny Tach for less than $ 50
RPM ___________ Speed (GPS)___________ No. of people ____________ Gal. Gas ________
WOT 4800rpm @ 26.5mph, 2 people, 5.3 gallons
14. Are you at sea level or a higher elevation, give us the elevation in feet __________
sea level
15. Has your motor been tuned up lately and have you checked that the carburetor butterfly is opening all the way by only using the control on the console, checked compression, looked at the plugs and checked spark, is the bottom of the boat clean and barnacle free, and have you checked the Tachometer against a mechanics tach, all of the foregoing could be the reason your prop is not attaining full RPM.
Everything ok.
16. How long has this prop been on the boat and why, at this time, do you think it is the wrong prop.
Came with boat, unknown history, doesnt reach in the rpm range
17. Does the prop show any damage that you can see
just a little worn
18. What problems are you trying to cure or what are you looking for the boat to do that it is not doing the way you think it should or to your expectations
Maybe something to get it into the right rpms. As a starter prop to do the actual performance tests I'm looking for a 'middle ground' prop. Aluminum, as it less expensive and may be replaced when the tests are done.
19. If you are trying to attain a better cruising speed and fuel savings or trying to attain a faster speed I will want you to take your boat and run it with 1 or 2 people and give me the RPM and speed readings starting at 3,000 RPM in 500 RPM increments all the way to WOT.
1. 3000 RPM
2. 3500 RPM
3. 4000 RPM
4. 4500 RPM
5. 5000 RPM
6. 5500 RPM
7. 6000 RPM
Unavailable
I also have a 15pitch propellor that i tried which gave be a lower speed and lower rpms so obviously straining the motor, i also have another 13pitch prop with a smaller diameter of around 10" i dont know what difference the less diameter would make compared to the current one?
1. Year, make and model of boat
1972 Pride Capella
See... http://news.google.com.au/newspapers?id=21EVAAAAIBAJ&sjid=cOUDAAAAIBAJ&pg=3218,1636805&dq=pride+capella&hl=en
2. Length, width and base weight of boat, look for boat decal on back of boat
13ft2in, 5ft7in, 450lb without motor, 635lb with motor
2a.What is the maximum recommended HP for your boat
80hp
3. Number of people and gallons of gas normally on boat
2 adults...13 gallons of gas (450lb)
4. What do you use the boat for
60% - fishing
40% - kneeboarding, wakeboarding
5. Is it a Deep Vee and if so how many degrees of Deadrise
No, 18degrees deadrise
6. Year, manufacturer and model of motor
1974?, mercury blueband 402
7. HP and gear ratio of motor IMPORTANT
If you don?t know the ratio, you need to pull the plugs out and put a piece of tape across the prop and the lower unit and then cut it between the prop and the housing then do the same thing on the flywheel and turn the motor until the tape lines up with each other on the prop, it is easier if two people do this, so one can watch the prop while the other counts the revolutions of the motor
40hp, 2:1 Gear Ratio
8. Manufacturer?s recommended Wide Open Throttle (WOT) range
4800-5300 RPM
9. Anti-ventilation Plate height above the bottom of the transom of boat if it is an outboard in inches, use a straight edge or a board under the keel and sticking out to the anti ventilation plate for a reference, and take about 4 pictures for us to see.
about even
10. Is it a bass boat or does it have a pad bottom
no
11. Does it have a hydrafoil, dolefin or trim tabs
Has trim tabs
12. Manufacturer, model, diameter, pitch, number of blades and whether SS or aluminum props.
IMPORTANT
Merc Quicksilver, 11.5? diameter, 13 pitch, 3 blades, aluminium
13. WOT RPM and speed from your current prop and how much gas and how many people were in the boat for the test data and is the speed by GPS. Make sure you trim the prop up until it starts ventilating and then just trim in until it quits ventilating. If you do not have a tach you can buy a Tiny Tach for less than $ 50
RPM ___________ Speed (GPS)___________ No. of people ____________ Gal. Gas ________
WOT 4800rpm @ 26.5mph, 2 people, 5.3 gallons
14. Are you at sea level or a higher elevation, give us the elevation in feet __________
sea level
15. Has your motor been tuned up lately and have you checked that the carburetor butterfly is opening all the way by only using the control on the console, checked compression, looked at the plugs and checked spark, is the bottom of the boat clean and barnacle free, and have you checked the Tachometer against a mechanics tach, all of the foregoing could be the reason your prop is not attaining full RPM.
Everything ok.
16. How long has this prop been on the boat and why, at this time, do you think it is the wrong prop.
Came with boat, unknown history, doesnt reach in the rpm range
17. Does the prop show any damage that you can see
just a little worn
18. What problems are you trying to cure or what are you looking for the boat to do that it is not doing the way you think it should or to your expectations
Maybe something to get it into the right rpms. As a starter prop to do the actual performance tests I'm looking for a 'middle ground' prop. Aluminum, as it less expensive and may be replaced when the tests are done.
19. If you are trying to attain a better cruising speed and fuel savings or trying to attain a faster speed I will want you to take your boat and run it with 1 or 2 people and give me the RPM and speed readings starting at 3,000 RPM in 500 RPM increments all the way to WOT.
1. 3000 RPM
2. 3500 RPM
3. 4000 RPM
4. 4500 RPM
5. 5000 RPM
6. 5500 RPM
7. 6000 RPM
Unavailable
I also have a 15pitch propellor that i tried which gave be a lower speed and lower rpms so obviously straining the motor, i also have another 13pitch prop with a smaller diameter of around 10" i dont know what difference the less diameter would make compared to the current one?
