I had a previous thread and got some great advice from Tail Gunner and Chappy but figured I would go ahead and provide my data on hwsii form since I have read so many of his posts. I am leaning towards Stiletto Bay Pro II or Solas Titan HR4 18p but wanted to double check sizing/geometry and get your thoughts.
Iboats Boat and Motor Info
1. Year, make and model of boat: 2009 Four Winns H200
2. Length, width and base weight of boat, look for boat decal on back of boat: 19'8", 8'4", 3000 LB
2a.What is the maximum recommended HP for your boat: 270
3. Number of people and gallons of gas normally on boat: 2-6 people, usually 4 people, 20 gals of gas
4. What do you use the boat for: Mostly wakeboarding, tubing, and kneeboarding
5. Is it a Deep Vee and if so how many degrees of deadrise: Yes, 19 degrees
6. Year, make. manufacturer and model of motor: 2008 Volvo Penta 4.3L GXi with SX drive
7. HP and gear ratio of motor IMPORTANT: 225 hp, 1.61:1 GR
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
8. Manufacturer?s recommended Wide Open Throttle (WOT) range: 4400-4800
9. Anti-ventilation Plate height above keel of boat if it is an outboard in inches, use a board under the keel and stiking out to the anti ventilation plate for a referene
10. Is it a bass boat or does it have a pad bottom: No
11. Does it have a hydrafoil, dolefin or trim tabs: No
12. Make, model, diameter, pitch, number of blades and whether SS or aluminum prop: Volvo Penta 14.3" 21p 3 blade aluminum
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 digital tachometer and hour meter here: http://cgi.ebay.com/ebaymotors/Tacho...Q5fAccessories $ 35
RPM ___4500______ Speed __45____ GPS __No____ No. of people __3____ Gal. Gas ___15_____
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 just pushing the throttle at the helm and not at the carburetor, checked compression, and looked at the plugs and checked spark as well as timing and advance, all of the foregoing could be the reason your prop is not attaining full RPM: Yes, tuned at 20 hrs, boat had around 40 hrs for test
16. How long has this prop been on the boat and why, at this time, do you think it is the wrong prop: OEM prop, minor damage, want 4 blade, probably SS for watersports
17. Does the prop show any damage that you can see: Small piece broken off on one of the blades.
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: Better holeshot and planing at lower speeds for watersports.
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.
REMEMBER, The numbers I give you will be NO better than the information you give me
The only thing I ask of you is to come back and give me a report of WOT RPM and speed for my database.
Iboats Boat and Motor Info
1. Year, make and model of boat: 2009 Four Winns H200
2. Length, width and base weight of boat, look for boat decal on back of boat: 19'8", 8'4", 3000 LB
2a.What is the maximum recommended HP for your boat: 270
3. Number of people and gallons of gas normally on boat: 2-6 people, usually 4 people, 20 gals of gas
4. What do you use the boat for: Mostly wakeboarding, tubing, and kneeboarding
5. Is it a Deep Vee and if so how many degrees of deadrise: Yes, 19 degrees
6. Year, make. manufacturer and model of motor: 2008 Volvo Penta 4.3L GXi with SX drive
7. HP and gear ratio of motor IMPORTANT: 225 hp, 1.61:1 GR
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
8. Manufacturer?s recommended Wide Open Throttle (WOT) range: 4400-4800
9. Anti-ventilation Plate height above keel of boat if it is an outboard in inches, use a board under the keel and stiking out to the anti ventilation plate for a referene
10. Is it a bass boat or does it have a pad bottom: No
11. Does it have a hydrafoil, dolefin or trim tabs: No
12. Make, model, diameter, pitch, number of blades and whether SS or aluminum prop: Volvo Penta 14.3" 21p 3 blade aluminum
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 digital tachometer and hour meter here: http://cgi.ebay.com/ebaymotors/Tacho...Q5fAccessories $ 35
RPM ___4500______ Speed __45____ GPS __No____ No. of people __3____ Gal. Gas ___15_____
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 just pushing the throttle at the helm and not at the carburetor, checked compression, and looked at the plugs and checked spark as well as timing and advance, all of the foregoing could be the reason your prop is not attaining full RPM: Yes, tuned at 20 hrs, boat had around 40 hrs for test
16. How long has this prop been on the boat and why, at this time, do you think it is the wrong prop: OEM prop, minor damage, want 4 blade, probably SS for watersports
17. Does the prop show any damage that you can see: Small piece broken off on one of the blades.
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: Better holeshot and planing at lower speeds for watersports.
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.
REMEMBER, The numbers I give you will be NO better than the information you give me
The only thing I ask of you is to come back and give me a report of WOT RPM and speed for my database.
But if your doing 4500 rpm @ wot and with a load turning a 23 then a 19 pitch 4 blade in ss would be a bit heavy and the 18 should be the sweet spot...And again in the end your splitting hairs here again i should no....I tinker around to the point that it is begining to annoy my wife..Hmm i wonder if one could make a necklace out of props...There shiny enough...:facepalm: