MarineEngine.com - Your online store for all types of marine engines and boat parts.
PHONE ORDERS
Monday - Friday
9:00 AM - 5:00 PM EST
Click for TOLL-FREE Number
Online Checkout
Special $9.95 Flat Rate Shipping
(800) 209-9624 | Home | Contact | Shipping | Returns | Cart View your shopping cart.
Part Number Search
Shop by engine/drive part number.
Original & matching parts for sale.
Manuals & Accessories
Shop by description, item number
or manufacturer's model number.
Boat Repair Forum Boat Repair Forum   Boat Video Gallery Video Gallery
   
Click for Crusader parts and manuals!
Results 1 to 14 of 14
  1. #1

    Default Antifreeze in cylinder

    Hello All,
    I have a pair of 1983 Crusader 350's, fresh water cooled.
    I winterized them last fall by running RV Antifreeze through the sea strainers while cranking them over but not letting them start.
    I'm getting ready to run them and in preparation, changed the spark plugs.
    Whn I removed one plug about a cup or so of the RV Antifreeze came out of the hole!
    This only happend on one plug but I am wondering how and why thsi happend and also what I should do next.
    Any ideas or comments would be appreciated
    Thanks

  2. #2
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    12,436

    Default Re: Antifreeze in cylinder

    Uh-oh. I'd run a compression test and see if you have a blown head gasket.

    How did that motor run before shutdown for the winter?

    Jeff

    PS: THe way you winterized them, you'll be lucky if parts of the raw water side aren't freeze cracked. You need to RUN the motor and pump the AF through it.

  3. #3

    Default Re: Antifreeze in cylinder

    The motor ran great before I put them to bed. I do not think anything froze as i had 2 "goldenrod" heaters on each engine and we didn't see any prolonged cold temps.
    The cylinder that had the RV AF in it is the one next to the 8" riser at the end of the log manifold. I am now thinking I have a bad riser and or gasket! There are stainless block off plates between the manifold and riser so maybe this is just the riser. No history on when they were last changed as we just got the boat last Spring.
    Comments anyone?
    Any great tips on removing the risers?
    Thanks.

  4. #4
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    12,436

    Default Re: Antifreeze in cylinder

    That sounds promising. Hope that's it.

    Jeff

    PS: Be sure to drain the...everything...before taking it apart.

  5. #5
    Join Date
    Sep 2007
    Location
    Egg Harbor, New Jersey, USA
    Posts
    1,572

    Default Re: Antifreeze in cylinder

    While the riser change is likely good maintenance anyway, are you sure it was antifreeze and not water? A few years back JUST BY CHANCE while changing sparkplugs after a winter layup, we had the plugs out and decided to spin the engine by cranking it based on a post I had read a few years earlier. Cylinder 1 port side (closest to the elbow) spit out about 1/4 cup of water assumably from condensation. Never gave it any further thought as it was a few years back BUT... as you read these posts...you start thinking and playing back the brain's video tape...FWIW, AL

  6. #6
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    9,627

    Default Re: Antifreeze in cylinder

    Never supply water / coolant to an inboard with out the motor running.--------------Motor should be running so that coolant is forced out with the exhaust.--There is always a chance it will back feed if motor is not running.

  7. #7

    Default Re: Antifreeze in cylinder

    Thanks for the replies.
    I've ordered new risers and elbows as I have no record on when they were last changed. Hope they come off without too much trouble but may take off the manifolds too.
    Guess I'll change my winterizing procedures as well.

  8. #8
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    12,436

    Default Re: Antifreeze in cylinder

    We all live and learn! I've always spin the motors over before trying to start them, in case there was water in the cylinders. What I did NOT do, however--like a total boob!--was running the blowers 4 minutes (as I always do upon starting them). The spark created by the starters alone is enough to blow the boat up if fumes are present! Like a fool I never thought of that before (and thanks to the wise gentleman on this site who brought it up).

    From now on I'll run the blower 4 minutes, test crank for water, run the electric boost pumps to fill the carbs (another few minutes), then crank 'em up.

    Older and wiser Jeff

  9. #9
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    5,557

    Default Re: Antifreeze in cylinder

    several good threads in the archive about winterizing these...use the search button.

    Also, several threads on elbow/riser/manifold R&R. Big tip - get new gaskets and pay attention to which one goes where and their orientation...the tabs oare on there for a reason!

  10. #10
    Join Date
    Dec 2008
    Location
    Bourne, MA, USA
    Posts
    250

    Default Re: Antifreeze in cylinder

    Mark, et al,

    Speaking of gaskets, the log-style round gaskets have either one hole (2 tabs) or three holes (one tab). A closed cooling system calls for a 3 hole gasket on each side of the stainless steel blocking gasket and this "sandwich" is used between the riser (when used) and the manifold, and a single one hole gasket between the riser and the elbow. My question is, does it really matter whether 3 hole or one hole gaskets are used in that sandwich? Someone told me that the 3 hole gaskets will help to cool the blocking plate, but wonder how true that may be. Your thoughts on this?

    Erich

  11. #11
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    5,557

    Default Re: Antifreeze in cylinder

    In the sandwich with the blockoff plate, the gasket picked won't make a difference. There's no 'cooling' benefit to the S/S plate provided by those holes in the gasket.

  12. #12
    Join Date
    Dec 2008
    Location
    Bourne, MA, USA
    Posts
    250

    Default Re: Antifreeze in cylinder

    Quote Originally Posted by makomark View Post
    In the sandwich with the blockoff plate, the gasket picked won't make a difference. There's no 'cooling' benefit to the S/S plate provided by those holes in the gasket.
    As always, thank you for the knowledgeable replies.

    Erich

  13. #13

    Default Re: Antifreeze in cylinder

    Just to follow up, I did change the risers and elbows. Turned out to be not too bad a job as the slid off the manifold with a few hammer taps and a slight pry at the stainless plate. Looks like they are date stamped into the cast 1981, so I guess these are originals! Says a lot about Crusader design and quality.
    Put the news ones in, no issues. I did clean all the paint off the mating surfaces, used Ultra Black very lightly and did replace the stainless blocking plates.
    I then removed the spark plugs, turned them over a few times, re installed plugs and both engines fired up like they were run yesterday! Thanks for the comments and advice!

  14. #14
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    12,436

    Default Re: Antifreeze in cylinder

    Great! Nice to hear a success story.

    Jeff

Similar Threads

  1. antifreeze ?
    By draven620 in forum Mercruiser Sterndrive Forum
    Replies: 5
    Last Post: 08-12-2010, 05:34 AM
  2. Antifreeze
    By isaacs in forum Mercruiser Sterndrive Archive
    Replies: 4
    Last Post: 12-08-2008, 07:22 AM
  3. RV antifreeze
    By dave_rose in forum OMC Sterndrive and Inboard Archive
    Replies: 12
    Last Post: 09-25-2008, 12:28 PM
  4. AQ145A Antifreeze in Cylinder
    By modemagic in forum Volvo Penta Gas Archive
    Replies: 49
    Last Post: 07-14-2008, 02:58 PM
  5. Antifreeze
    By drpepper in forum Miscellaneous marine engine topics
    Replies: 2
    Last Post: 01-22-2008, 10:59 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
  •