525 Engine timing adjustment
+ Reply to Thread
Results 1 to 6 of 6

Thread:
525 Engine timing adjustment

  1. #1
    Junior Member troublemaker468's Avatar
    Join Date
    Feb 2009
    Location
    Las Vegas, NV
    Posts
    12

    Default 525 Engine timing adjustment

    I know for the new 525's there is no timing adjustment necessary...all the sensors are located on the timing cover and the distributer hole is plugged. But the older models have a sensor that sits in the distributor hole (a crank position sensor, I think). So, my question is how do you adjust that? I have the manual for the new model engines, I just don't want to spend another $70 on the older manual... I need gas money.. lol

    Thanks
    Gary
    Last edited by troublemaker468; 03-03-2009 at 01:43 PM.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Dec 2007
    Location
    Olympia, Washington
    Posts
    588

    Default

    Should be a cam position sensor and turning the dist. does not affect timing but alters the rotor phase. Do yourself a favor and buy the manual.

  4. #3
    New here Beer:30's Avatar
    Join Date
    Feb 2008
    Location
    Bakersfield, CA
    Posts
    4,219

    Default

    There must be a cam sensor where the distributor goes. It would look like a cap, but with a weatherpack connector and wires. There has to be something in there, as a Gen VI block still needs the cam to turn the oil pump. Usually is a good place for a cam sensor to do all of it.

    Arizona Speed and Marine has a kit to make your 525 fully adjustable:






    Arizona Speed and Marine now has the solution for the HP525 owner looking to take their engine to the next level. Up until now, there hasn't been an way to tune for improvements to the HP525 such as adding a supercharger, going to a bigger camshaft, or taking the HP525 to 540 inches. These had always been popular upgrades to the HP500 which was the predecessor to the HP525. The new Motorola ECU that Mercruiser went with on the 525 makes it impossible to tune for aftermarket upgrades due to the lack of calibration software for the new ECU. We can now provide you will all the components to allow complete control over the fuel delivery, ignition timing, rev-limiter and much more.

    The kit comes with the following components:

    - Delphi MEFI ECU

    - Marine Spec Wiring Harness

    - 58X Big Block Chevy Reluctor Wheel

    - Ignition Coil Packs with mounting bracket and hardware

    - All Necessary additional sensors
    Last edited by Beer:30; 03-03-2009 at 01:09 PM.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Junior Member troublemaker468's Avatar
    Join Date
    Feb 2009
    Location
    Las Vegas, NV
    Posts
    12

    Default

    Still no answer to this problem. I tried to order the service manual from two different companies...and both times received the manul for the newer 525's...the ones that don't have that sensor in the distributer hole..

    Does anyone here have a copy of the earlier manual...the first batch of serial numbers back in 2004/5??

    thanks.

  7. #5
    New here Beer:30's Avatar
    Join Date
    Feb 2008
    Location
    Bakersfield, CA
    Posts
    4,219

    Default

    So you are saying you have a 525 WITH a distributor? I thought all of them were DIS?

    In the distributor hole would be a CAM sensor to time the sequential injection. It can be adjusted to advance the fuel delivery or retard it. My turbo Buick GN has a timing sequence to advance the injection, which makes them more responsive than stock. I don't see any way it can increase power, but it may make the boat peppier.

    I am not a blue motor guru, but I just didn't think they made 525s with distributors?
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  8. #6
    Junior Member troublemaker468's Avatar
    Join Date
    Feb 2009
    Location
    Las Vegas, NV
    Posts
    12

    Default

    No...it's not a distributor. Kind of looks like one though.

    Whatever it is they moved it to the front timing cover on the new motors...and it's referred to as a "crankshaft sensor".
    Last edited by troublemaker468; 04-04-2009 at 05:13 PM.

+ 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