Register

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 7 of 7
  1. #1
    Registered
    My Boats:
    '96 Eliminator Eagle 250 XP
    Join Date
    Jun 2004
    Location
    Sun Prairie, WI
    Posts
    979

    engine burned down

    I've got a buddy with an older sea ray with chevy sb that he rebuilt last year. He had the cylinders bored and honed, new pistons/rings, head job, pretty much everything. He and his buddies assembled the engine. He ran it a couple of times last year, but said it wasn't running super good, he thought the new carb needed some adjusting.

    This year, he took it into the shop, and they put new plugs in, new wires, cap and rotor, and adjusted the timing. When he took it out he said it was doing fine then gradually started slowing down till as fast as he could go was 30mph. He checked the plugs, and found cylinder one plug hand tight, took it out and the electrode was completely cooked, or burned down. When he took it to the shop, the guy checked and found two cylinders with low compression and the other plug was the same.

    My buddy pulled the heads now and found both of those pistons were crumbling and coming apart, whatever you wanna call it. Did this happen from a head gashet or intake gasket not installed correctly? Water in the motor, would this do that?

  2. #2
    Registered hillbilly24's Avatar
    Join Date
    Oct 2004
    Posts
    1,358

    Re: engine burned down

    possible intake gasket leak, but more likely carb running way to lean or bad gas left over from last season. The loose plug and meted electrode was cuased by an extremly lean condition.

  3. #3
    Registered Turbojack's Avatar
    My Boats:
    2003 Eliminator 30' Daytona
    Join Date
    Sep 2001
    Location
    Houston, TX, USA
    Posts
    2,171

    Re: engine burned down

    Detonation, (pinging)it will distroy a motor. Tears up valves, spark plugs, & pistons. What did other spark plugs look like? White in color. If so then motor was too lean. Detonation is caused by too much timming, too hot spark plugs, lean fuel mixture, low octane gas, & engine getting too hot.

  4. #4
    Registered carney's Avatar
    My Boats:
    1997 35 lightning
    Join Date
    Jan 2003
    Location
    FINGER LAKES N.Y.
    Posts
    796

    Re: engine burned down

    I put together a nice small block for a guy, He wanted to go like h77L. and run with the big guns, He brought the boat back after a couple of months. He said it was running like bad. Idid a leak down found two bad cylinders , melted like you are telling. He was running 87 oct and got it hot. fixed motor got him on the right octane and wow It runs great. Cheap beer big head ache, Cheap gas big repair bill.

  5. #5
    Registered The Menace's Avatar
    My Boats:
    46 turbined Skater
    Join Date
    Nov 2002
    Location
    Bonita Springs, Florida
    Posts
    3,028

    Re: engine burned down

    To little fuel casues detonation and extreme heat. It is engine rebuilding time.

  6. #6
    VIP Member VIP Member JaayTeee's Avatar
    My Boats:
    2002 baja 33 o/l 575sci's
    Join Date
    Nov 2002
    Location
    ankeny,ia.
    Posts
    3,030

    Re: engine burned down

    Saw that happen to a friends dad's boat.

    During winterization, he pulled all the plugs,
    shot oil into the cylinders.......apparently,
    he forgot to tighten one....... first time out the following
    spring, ran for a while, eventually started losing power,
    shortly after that....... hole in a piston.


    The loose plugs can't dissapate heat
    into the cylinder heads, they get too
    hot......preignition......BOOM
    holes in pistons and other carnage.

  7. #7
    Registered
    My Boats:
    '96 Eliminator Eagle 250 XP
    Join Date
    Jun 2004
    Location
    Sun Prairie, WI
    Posts
    979

    Re: engine burned down

    the shop that worked on the boat, did replace the plugs. I don't suppose anything with the motor would cause a plug to loosen up?


Similar Threads

  1. burned ground wire
    By Flamingo 32 in forum General Q & A
    Replies: 2
    Last Post: 05-30-2008, 07:40 PM
  2. Help! Burned piston
    By scarab39 in forum General Q & A
    Replies: 46
    Last Post: 04-30-2006, 02:10 AM
  3. Burned Blade??
    By restabr in forum Prop Talk
    Replies: 22
    Last Post: 11-29-2005, 10:50 AM
  4. The Oasis on Lake Travis burned down
    By BajaRunner in forum General Boating Discussion
    Replies: 0
    Last Post: 06-01-2005, 09:21 AM

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 11:34 PM.
Powered by vBulletin® Version 4.2.0
Copyright © 2014 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 © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2011 OffShoreOnly. All rights reserved.