If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Follow us on Facebook Follow us on Twitter
Results 1 to 2 of 2
  1. #1

    Help with 502 mag.

    Went to get on plane, one engine wouldn't go over 2500 rpm, I gave it WOT and it wouldn't go past 3K rpm. It starts and idles fine. The motor doesent make any unusual noise. The plugs and the carb look good. The boat is a 1993 Formula 336. Any help would be appreciated.

  2. #2
    Registered mats's Avatar
    My Boats:
    Baja 1988
    Join Date
    Oct 2002
    Stockholm, Sweden
    reading out of the troubleshooting section in the manual;
    Check trottle linkage for binding.Check for low fuel pump volume,incorrect float drop, a clogged fuel filter, stuck power valve or an inoperative secondary system

Similar Threads

  1. May Need A New Mag 502
    By Sundown94 in forum General Boating Discussion
    Replies: 0
    Last Post: 03-09-2007, 04:58 PM
  2. 502 Mag to 502 Mag MPI
    By wallynt in forum General Q & A
    Replies: 7
    Last Post: 03-14-2005, 02:33 PM
  3. 502 Mag??
    By mopower in forum General Q & A
    Replies: 0
    Last Post: 10-16-2004, 03:34 PM
  4. 454 Mag or 502 Mag
    By Cmoney in forum General Q & A
    Replies: 3
    Last Post: 08-02-2004, 11:15 PM
  5. G.M. 502/502 Mag New Service Longblock (502HP)
    By XCAV8 in forum General Q & A
    Replies: 18
    Last Post: 05-10-2004, 09:58 PM

Posting Permissions

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

OSO Directory
All times are GMT -5. The time now is 01:28 AM.
Powered by vBulletin® Version 4.2.0
Copyright © 2017 vBulletin Solutions, Inc. All rights reserved.
Search Engine Optimization by vBSEO 3.6.1
Original Poster In Postbit provided by Original Poster In Postbit v1.0.0 (Free) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2011 OffShoreOnly. All rights reserved.