Advise
+ Reply to Thread
Results 1 to 12 of 12

Thread:
Advise

  1. #1
    Senior Member Beerguy's Avatar
    Join Date
    Apr 2008
    Location
    Lake Havasu AZ.
    Posts
    2,233

    Default Advise

    I bought a 20ft. Campbell recently. It has an LS-6 .30 over. 830 holley, single plain manifold and roller rockers. Has a Casale 500C with 22% od gears, spinning a 13/11 3 blade prop.

    Had it out today and ran it for about an hour, from Windsor launch ramp down to Copper Canyon, by the time I had got back by Crazy Horse, I had used up 1/2 tank of fuel. My tanks are 30 gal each.

    I was only running it at about 2600 rpm for most of the time.

    Any advise as to changes needed to make this alittle more fuel friendly?

    We will be using the boat for basic cruising around the lake.

    Thanks,
    Larry
    Last edited by Beerguy; 09-26-2008 at 03:33 PM.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Member
    Join Date
    Mar 2008
    Posts
    55

    Default

    Larry---Keep the diameter of the prop the same but run more pitch.

  4. #3
    Senior Member Beerguy's Avatar
    Join Date
    Apr 2008
    Location
    Lake Havasu AZ.
    Posts
    2,233

    Default

    Quote Originally Posted by palhal View Post
    Larry---Keep the diameter of the prop the same but run more pitch.
    Go to a 14 or 15 pitch?, so run a 13/14, I can buy a 12/15 in town, should I try that one?

    Thanks,
    Larry

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    I'm famous ! Lucky's Avatar
    Join Date
    Dec 2007
    Location
    Ukiah,Ca
    Posts
    7,043

    Default

    That seems like allot of over drive - what is your max rpm ?
    " my carbon footprint is gonna kick your green ass"


    Quote Originally Posted by 396_Ways_To_Spit View Post
    WOWO!!!!! THat has to be the most beautiful crank that Ive ever seen!!!!!!!!!!!!!!!!


    Quote Originally Posted by MAXIMUS View Post
    He has been allowing me to park my equipment in his backyard for a few years now...
    [/SIGPIC]

  7. #5
    Senior Member Beerguy's Avatar
    Join Date
    Apr 2008
    Location
    Lake Havasu AZ.
    Posts
    2,233

    Default

    Quote Originally Posted by Lucky View Post
    That seems like allot of over drive - what is your max rpm ?
    4600 rpm, the boat came with these gears.

  8. #6
    Senior Member Beerguy's Avatar
    Join Date
    Apr 2008
    Location
    Lake Havasu AZ.
    Posts
    2,233

    Default

    Quote Originally Posted by palhal View Post
    Larry---Keep the diameter of the prop the same but run more pitch.
    Gary from Willmington Prop is bringing me out a 13/13 to try next week. Great guy, met him and his wife on one of our neighborhood walks.

  9. #7
    Member
    Join Date
    Mar 2008
    Posts
    55

    Default

    Anything above 12" dia. is ok. You have a heavy boat.

  10. #8
    JWM
    JWM is offline
    Boat Test GURU JWM's Avatar
    Join Date
    Dec 2007
    Location
    Santa Ana, CA
    Posts
    516

    Default

    PALHAL Working with a propeller is a good idea but I think you need to check all your engine systems.
    First check the tune up of your engine. Timing is going to add some milage if it's not correct. Next check the spark plugs! Do they need to be changed? You can work with the spark plug gap to add some milage. What ignition system do you have?? This could add to your fuel issue. Next thing is the 830 carb on a .030 454 (461). Why so big? You can't use 830CFM of air at 4600 rpm. Step down the carb size and create more torque to push that heavy boat you have!!!
    This is what I would do if I wanted better fuel consumption.

    JW
    Sales & Service! V-Drives, Outdrives, Jet-Drives, MerCruiser, and Mercury Racing Parts.
    -Performance Engine Building-714-540-8908

  11. #9
    Boat Nut sleekcrafter's Avatar
    Join Date
    Dec 2007
    Location
    South Elgin, Il.
    Posts
    5,131

    Default

    Blown or wrong PV in carb?

  12. #10
    Senior Member Beerguy's Avatar
    Join Date
    Apr 2008
    Location
    Lake Havasu AZ.
    Posts
    2,233

    Default

    Quote Originally Posted by JWM View Post
    PALHAL Working with a propeller is a good idea but I think you need to check all your engine systems.
    First check the tune up of your engine. Timing is going to add some milage if it's not correct. Next check the spark plugs! Do they need to be changed? You can work with the spark plug gap to add some milage. What ignition system do you have?? This could add to your fuel issue. Next thing is the 830 carb on a .030 454 (461). Why so big? You can't use 830CFM of air at 4600 rpm. Step down the carb size and create more torque to push that heavy boat you have!!!
    This is what I would do if I wanted better fuel consumption.

    JW
    Thank you for your advice. Plugs are new, gaped properly, plugs have a nice choc brown to them. Ignition is a Mercury Thunderbolt system. Timing is set correctly, carb was rebuilt and re jetted, 7 lbs. of fuel pressure, all this done about three weeks ago by Huston Marine in Havasu.(long time Campbell mechanic). Motor runs fantastic, so not sure about the tune-up being the problem. I will re-check the timing and the gap on the plugs.
    What advice do you have as to what prop size you would recommend.

    Thank you

    Save the Salt

  13. #11
    Members only MAXIMUS's Avatar
    Join Date
    Jan 2008
    Location
    Close by
    Posts
    4,518

    Default

    Quote Originally Posted by sksadie View Post
    Thank you for your advice. Plugs are new, gaped properly, plugs have a nice choc brown to them. Ignition is a Mercury Thunderbolt system. Timing is set correctly, carb was rebuilt and re jetted, 7 lbs. of fuel pressure, all this done about three weeks ago by Huston Marine in Havasu.(long time Campbell mechanic). Motor runs fantastic, so not sure about the tune-up being the problem. I will re-check the timing and the gap on the plugs.
    What advice do you have as to what prop size you would recommend.

    Thank you

    Larry Jim has a real nice 4 blade somewhere... It might be the wrong rotation however?

  14. #12
    Senior Member CampbellCarl's Avatar
    Join Date
    Jan 2008
    Location
    Whittier, CA & Katherine Landing
    Posts
    3,040

    Default

    Maxi
    Don't you have a 3 blade you want to get rid of? I heard Whiskers didn't like it!
    C

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95