1986 21' bayliner capri... what prop are u guys using

s2klove04

Recruit
Joined
Jul 13, 2009
Messages
3
ok so i got a 1986 bayliner capri 21' with the factory v8 5.7 liter volvo penta inboard with the factory volvo penta outboard.. the prop i have now is all beat up so i wanna replace it but i dont know with which one.. what are u guys using? i dont have much info on anything else so try to work with me here... i can say that at 3300-3400 rpm's im doing about 24-25 mph....

any help is greatly appreciated

thanx in advance
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: 1986 21' bayliner capri... what prop are u guys using

Finding someone with the same setup isn't likely.
There should be numbers on the barrel of the prop or under the prop nut.
It may be possible to get the prop repaired and make a couple of test runs.
Give us the details,prop size,stainless or aluminum,max rpm and speed(gps is best)rated rpm of the motor.Usually on a label on the motor.
You could try a couple of runs with the beatup prop but usually doesn't prove much.
 

hwsiii

Commander
Joined
Jan 25, 2009
Messages
2,639
Re: 1986 21' bayliner capri... what prop are u guys using

S2k, I am sorry but I have been real busy lately this is the information I need to help you, get me as much as possible and I will tell you I need more information than anyone else. But if you would like my help fill this form out and I will help you as much as I can, if you would prefer to not go to this much trouble there are other people who will help you.

Iboats Boat and Motor Info
1. Year, make and model of boat
2. Length, width and base weight of boat, look for boat decal on back of boat
2a.What is the recommended HP for your boat
3. Number of people and gallons of gas normally on boat
4. What do you use the boat for
5. Is it a Deep Vee and if so how many degrees of deadrise
6. Year, make and model of motor
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 and turn the motor until the tape lines up with each other, 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
9. Anti-ventilation Plate height above keel of boat if it is an outboard in inches
10. Is it a bass boat or does it have a pad bottom
11. Does it have a hydrafoil, dolefin or trim tabs
12. Make, model, diameter, pitch and whether SS or aluminum prop
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. If you do not have a tach you can buy a Tiny Tach for $ 50
14. Are you at sea level or a higher elevation, give us the elevation in feet
15. Has your motor been tuned up lately and have you checked that the carburetor butterfly is opening all the way, checked compression, and looked at the plugs and checked spark, all of the foregoing could be the reason your prop is not attaining full RPM
16. How long has this prop been on the boat and why, at this time, do you think it is the wrong prop
17. Does the prop show any damage that you can see
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
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.

H
 
Top